System for two-way high-speed short-wave radio communication

FIELD: physics, communications.

SUBSTANCE: invention relates to radio communication and can be used in constructing high-speed two-way radio links operating at one frequency when transmitting discrete or analogue signals. A system for two-way high-speed short-wave radio communication consists of two transceiving sets, each comprising an analogue signal source, an analogue signal receiver, a signal compressor, a signal expander, a control unit, a modulator, a transmitter, a transceiving antenna, a first input signal switch, a demodulator, a clock signal demodulator, a receiver, wherein each transceiving set further includes an encoder, a decoder, a discrete signal source, a discrete signal receiver, a first radio signal switch, an output signal switch, a digital selective call (DSC) signal generator and a second input signal switch.

EFFECT: high link throughput and more radio subscribers that can operate at the same operating frequency.

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The invention relates to the field of radio communications and can be used when building a high-speed duplex radio links operating on the same frequency in the transmission (reception) of a discrete or analog signals.

Known system duplex radio communication, consisting of two transmitter / receiver sets, each of which contains serially connected to the signal source, modulator, transmitter, and also serially connected to the receiver, the demodulator, the receiver of the signal, and a receive / transmit antenna, the input and the output of which is connected to the transmitter output and the receiver input, respectively, switching of each of the sets in the mode of "receiving" or "transfer" is performed manually [1].

Known duplex radio systems the closest in spirit of challenge and the most matching features is a system of duplex radio communications [2], consisting of two transmitter / receiver sets, each of which contains the analog signal source and the receiver of the analog signal, the device of signal compression and expansion unit signal, the control unit, the output of which is connected to the control input of signal compression modulator serially connected to the transmitter and a receive / transmit antenna and the first switch input signals, a demodulator, o�d which is connected to the input of the device extension of the signal the demodulator clock, the output of which is connected to the input of the control unit, and the receiver, the output of which is connected in parallel with the input of the demodulator and the input of the demodulator clock.

Consider the disadvantages of the known system of duplex radio communications [2] when operating in high (KB) radio channel.

Each transmitter / receiver kit this system contains two modulators: a primary modulator signal and the modulator clock to enable synchronous separation in time adjustment radio with mode "reception" mode to "transfer" or Vice versa.

For a more noise-isolation clock signal received from each transmitter / receiver kit quanta messages in [2] proposed to use various types of modulation of the main signal and the dot clock:

- when the transmission of the telephone (PHONE) signal is the analog modulation type, for example, using a class of emission Azay - two-way telephony with amplitude modulation of the carrier frequency [3];

- when the transmission clock - selectable modulation type, for example, the frequency F1B telegraphy-500, 300 Baud.

Switching various analog modulating signals to the same input is possible only when the exciter of the transmitter has the input of external information with any vido� modulation at intermediate frequency (if). For example, the modern agents of type "Surf", P-170 VM [4] and agents of the old Park of the type P-170V (specifications CL.209023 TU) are input at the if - frequency of 128 kHz. According to [2] and main clock signals must be generated at the inverter be switched to the input that's the type of pathogen.

It is known that to increase the energy of the resulting signal transmitted must ensure the formation without rupture and abrupt phase changes of the amplitude of the carrier wave [5], in this case - in the moments of change of modulation type. A necessary condition for the exception of step changes in phase is the use of a single reference oscillator to form the inverter as the core of the transmitted signal and the synchronous signal.

However, in the known system a duplex radio communication, the formation of the main and the timing of modulating oscillations is different from offline modulators (electrical connections between the modulators are missing). Thus, the outputs of these modulators, which can be formed only from an independent reference generator in the composition of these modulators will differ both in phase and in frequency (within the resulting instability of used generators and accuracy in their initial adjustment of the frequency).

Accordingly, in the moments of switching of the modulating signals, the phase and the amplitude of the resulting signal at the input of the exciter of the transmitter may change abruptly, moreover, at the time of transfer clock frequency of the transmitted broadcast signal may differ from the frequency of the main signal.

Abrupt changes of phase or amplitude of the signal at the input of the pathogen lead to short-term attenuation of the transmitted result of the signal due to the transient processes during further passage of the signal through a narrow-band selective circuit of the pathogen [5].

When the transfer clock at the beginning of each transmitted quantum communications abrupt changes of phase and amplitude of the carrier wave will lead to a reduction of primary energy of the transmitted signal in the initial periods of time quanta generated signal, when the transmission clock at the end of each quantum transmission to reduce the energy of the transmitted signal in the initial time segments transmitted in the broadcast signals. In both cases, these phenomena, including changes in the frequency of the radiated signal, is undesirable as it reduces the noise immunity of the reception.

The implementation of the requested method of formation of the resulting signal in digital form with the submission of the digital data stream on a digital input�d modern exciter type P-170 VM at the junction of the Ethernet [4] could not be implemented in this structural development of the known system of duplex radio communications.

Another disadvantage of the known system duplex radio communication is that, the introduction of the transmitted signal (of any kind) redundant timing information leads to lower communication bandwidth, as well as what is not envisaged measures for the suppression of unwanted radiation noise and harmonic nature of the transmitter at the receiver input at time intervals of "reception", which decreases the communication range.

The disadvantage is the fact that you want to extend the bandwidth by transmitting and receiving signals of at least two times due to the compression of the transmitted signal twice. For example, for transmission (reception) analog PHONE signal traditional method requires a single-sideband signal in the upper side band amplitude modulation class of emission J3E, NE or R3E [3] with a bandwidth of 3100 Hz.

To transmit the same signal using the known system will require a dual band signal class radiation Azay that will reduce the noise immunity of the main signal due to the expansion of the passband of the main filter selection PHONE signal at the reception.

In addition, a significant disadvantage of the known system duplex radio communication is that, when working in high (KB) radio channel structuring transmitter / receiver set�Chow this system can provide high-speed exchange of data with the use of sources and recipients of the discrete signal and allows to provide only analog radio telephone messages using analog sources and receivers of the signal (for example, two microphones and two phones). For proof of this assertion will analyze the possibility to work with well-known systems in KB the radio channel using both analog and digital sources and receivers of the signal.

As is known, the main obstacle to increase the speed of transmission of binary information at KB channel is multipath propagation. In this case, the received signal is a set of components (rays) reflected from different layers of the ionosphere. The number of rays at the point of admission and the amount of multipath is determined by the length of the route, the choice of the operating frequency and the state of the ionosphere [6, 7]. At frequencies close to the optimum working frequency (CFP) are often observed two beams at frequencies much smaller ORC, the number of rays is increased to four, five or more. The spacing of multipath for KB is in the range of 2-4 MS, reaching in rare cases of large values. In this case the amplitude of the beams exposed to federovna, and the ratio between them can be different and can change over time.

Consider the work of well-known systems duplex radio in a multipath KB channel using traditionalto transmitting and receiving analog messages. For example, with the use of modern agents of type P-170 VM [4]. one is to pass a primary PHONE signal (radiation class AZE), the other for the transmission of the synchronous signal by the method of frequency F1B telegraphy-500 with a speed of 300 Baud, as recommended in [2] (formed on the inverter and switched to the input of the inverter exciter transmitter).

For reception of the main PHONE signal, and receiving and demodulating clock will use the receiver R-170 PM, with separate outputs [4]:

for head phones when receiving PHONE signals;

- on the recording apparatus when the reception of Telegraph signals.

In traditional single-channel method of receiving and demodulating Telegraph signals (autocorrelation reception [8]) and the duration of elementary parcels (binary feature), the signal is much greater latency comparable to the level of rays provided satisfactory reception of Telegraph signals (in the present case - clock): boundary value (Telegraph) distortion of the demodulated signal caused by multipath propagation and additive noise (noise) do not exceed the correcting ability of the regeneration device in the structure of the demodulator, reducing the true position of the boundaries take binary signal [8].

Decreasing the duration element of the signal (increasing�Oia transfer rate) or increase the delay between commensurate rays (when working at KB tracks of different lengths) there is a "blurring" of fronts accept parcels sent at separate time intervals (when levels of various rays commensurable) or the offset of the sequence of received parcels in time in the direction of the lead or lag depending on, from what rays (leading or trailing) to other time intervals exceeds the level (not less than a certain value), any other beam. For this reason, in [2] and recommended a relatively low transmission rate clock is 300 Baud (the length of the element signal to 3.3 MS).

In the known system a duplex radio communication in the transmission of analog PHONE signal to change the time position of quanta of the received signal in accordance with changes in the temporal position of the received clock signal a significant impact on the quality of hearing do not have a reception, because the hearing aid person is not very sensitive to phase distortion of the signal [8] (after "stitching" quanta signal in the expansion unit signal).

However, if in the known system instead of an analog PHONE signal from the output of the signal source to transmit a discrete binary signal, for example, at a rate of 600 bit/s after compression in the compression device signal must be supplied to the input of the modulator at a speed of 1200 bps, then the emitted quanta resulting signal formed using conventional modulation techniques, such�EP, using class of emission G1B (oft) for transmission of the primary digital signal with a speed of 1200 bit/s - duration of the element signal of 0.83 MS, and class F1B-500 for transmitting clock at a speed of 300 Baud is 3.3 MS, as recommended in [2]) are unsuitable for the implementation of full-duplex radio in a multipath KB channel.

The fact is that when the path difference of the separate beams exceeding the duration of elementary parcels, in lengths or quanta demodulated binary sequence can appear specific errors in the form of inserts or deletions of the corresponding number of characters when changing the beam with the maximum level. Accordingly, when "stitching" distorted quanta binary signal in the expansion unit signal generated at the reception of a binary sequence can be completely unsuitable for the recipient of a discrete signal.

Moreover, the very structure known system duplex radio communication is conceptually impossible to synchronize the source and destination of a discrete signal, which can be regarded as terminal equipment (transmission and reception) by interacting KB two channel transmitter / receiver sets.

For simultaneous operation of transmitting and receiving terminal equipment of the radio system a necessary condition�the device clock and frame synchronization, and it should be possible to install each transmitter / receiver set in the master mode or slave at the beginning of the session.

In the known duplex radio communication system are provided, i.e. structuring of the system can claim the versatility of using different sources and receivers of signals. Thus, taking into account the above it is confirmed that this system is designed for duplex radio communication using sources only analog signals. Tasks the solution of which directed the present invention is a system duplex high-speed short-wave radio, are:

- improving the noise immunity of the reception of telephone messages by reducing bandwidth not less than twice and implementation of the modulator and demodulator in the system through the application of the method of sealing with orthogonal frequency division (OFDM - Orthogonall Frequency Division Multiplexing) to achieve the greatest density padding frequency band using OFDM;

- increase communication bandwidth by eliminating special clock that is input in the resulting transmitted signal, and use for duplex radio communication signal OFDM with high spectral density instead of an�logologo PHONE signal with significantly lower spectral density;

- expand the functionality of the system by introducing additional technical tools and the use of OFDM, which provides full-duplex exchange in multipath KB channel like telephone and high-speed discrete messages.

- increasing the number of stations that can operate at the same operating frequency, due to the introduction of technical means of transmission and reception of digital selective calling (DSC);

- increase transmission power by reducing the input level of own noise of the transmitter in the time intervals "welcome".

Problem solving is achieved in that in the system of duplex high-speed communications system consisting of two transmitter / receiver sets, each of which contains the analog signal source and the receiver of the analog signal, the device of signal compression and expansion unit signal, the control unit, the output of which is connected to the control input of signal compression modulator serially connected to the transmitter and a receive / transmit antenna and the first switch input signals, the demodulator, the output of which is connected to the input of the device extension of the signal, the demodulator clock, the output of which is connected to the input of the control unit, and when�mnik, the output of which is connected in parallel with the input of the demodulator and the input of the demodulator clock, we have introduced in each transmitter / receiver kit encoder, the input of which is connected to the output of the analog signal source, and a decoder, the output of which is connected to the input of the recipient of the analog signal, the discrete signal source and the recipient of a discrete signal, the first switch of the radio signals, a switch output, input, first and second outputs of which are connected respectively with the output of the extension signal to the input of the decoder and to the input of the recipient of a discrete signal, and the control input of the switch output signals, which input source control signal transmitter / receiver kit combined with the control input of the first switch input signals, an output, first and second inputs of which are connected respectively with the input devices of expansion of a signal, with the output of the encoder and the output of the discrete signal source, additionally introduced shaper signal digital selective calling (DSC) and second switch input signals, the output of which is connected to the input of the modulator, the output of which is connected to the input of the transmitter, the output of which is additionally connected with the signal input of the first switch of the radio signals, the output of the control unit is connected to the additional�Uo with the control input of the first switch of the radio signals, with the additional input of the transmitter and with the additional input of the demodulator, and the first additional input of the control unit, which input the control signal transmission unit transmitting or receiving set, combined with the control input of the second switch input signals and to a control input of the shaper of the DSC signal, the output of which is connected to the first input of the second switch input signals, a second input connected to the output of a device for compression of the signal, the first and second complementary outputs of which are respectively connected to a clock input of the shaper of the DSC signal and the second additional input of the control unit, the third additional input which is the input of transmitter / receiver set up to receive signal and its fourth input connected to an auxiliary output of the device of expansion of a signal input coupled additionally with the fifth additional input of the control unit.

Each transmitter / receiver set the device to compress the signal consists of a first memory block, the input and output of which are respectively the input and output of a device for compression of the signal, the first counter of the record, the first counter reading of the first block phasing and the first unit clock whose input is combined with the input of the first block� memory and the first and second outputs respectively connected to a clock input of the first counter with a clock input of the first counter reading, the output of which is combined with the control input of the readout of the first memory block and the first input of the first block phasing, a second input is combined with the control input of the first memory block and the output of the first counter records, the control input of which is connected to the first output of the first block phase, the second output of which is connected to the control input of the first counter reading, and the second output of the first unit clock synchronization, the third output and the third input of the first block of phase are respectively the first additional output, the second additional output and the control input of a device for compression of the signal.

Each transmitter / receiver set the control unit comprises an OR element, first and second triggers, the third switch input signals, the nor gate and the decoder of the DSC signal, the output of which is combined with the first input of the OR gate and to a first input of the first trigger, the output of which is connected to the control input of the third switch input signals, the output of which is connected to a first input of a nor gate, a second input connected to the output of the second trigger, the first input of which is connected to VGA output�element OR, moreover, the first and second inputs of the third switch input signals, a second input of the first trigger, combined with the second input element OR the second input of the second trigger, the first and second inputs of the decoder of the DSC signal and the output of the nor gate are respectively the input, second, first, third, fourth and fifth additional inlet and outlet of the control device.

Each transmitter / receiver set the expansion unit signal consists of a second memory block, the input and output of which are respectively the input and output devices of expansion of a signal, a second counter records the second counter reading of the second block phase, the second block clock block and frame synchronization, the input of which is combined with the input of the second memory block and the input of the second block of synchronization, the first and second outputs of which are respectively connected to a clock input of the second counter reading and a clock input of the block cyclic synchronization, combined with a clock input of the second counter records, and an output device for the extension signal, the output of the second counter records combined with the control input of the recording of the second memory block and the first input of the second block phase, a second input, combined with the control input of the read in�section, which memory block and the output of the second counter reading, the control input of which is connected to the first output of the second block phase, the second output of which is connected to the control input of the second counter record, and the third input of the second unit of phase is connected to the output of the frame synchronization.

Each transmitter kit modulator is made in the form of series-connected series-parallel Converter, the input of which is the input of the modulator, and the processing unit of the OFDM signal, the output of which is the output of the modulator.

Each transmitter / receiver kit transmitter comprises a series-connected exciter, the input of which is input to the transmitter, power amplifier and harmonic filter, whose output is the output of the transmitter, the control input of the exciter, which is an optional input to the transmitter, combined with the control input of the power amplifier and the control input of the harmonic filter, which contains the band To filter nodes, the input and output of each of which via movable and fixed contacts of the respective two three-prong switches are connected to input and output harmonic filter, respectively, other fixed contacts of all 2 three-prong switch harmonic filter connected to a common bus and a normally closed contact with the corresponding machined parts�important contacts each band of the filter node includes a main filter element, the input of which is an input band filter node, and an additional filter element, whose output is the output band of the filter node and the second switch signal, a signal input which is combined with the output of the main entrance and additional filter elements, the signal output of the second switch signal is connected to the shared bus, and its control input is a control input of the frequency filter node, the control inputs of all band filtering of nodes combined with the control input of the harmonic filter.

Each transmitter / receiver kit demodulator made in the form of series-connected unit demodulating the OFDM signal, the input and the control input of which are respectively the input and the additional input of the demodulator, and a parallel-serial Converter, the output of which is the output of the demodulator.

Each transmitter / receiver set the demodulator clock is made in the form of series-connected amplitude detector, the input of which is the input of the demodulator clock, and regenerator, whose output is the output of the demodulator clock.

Fig.1 shows a diagram of the electrical page�churna of the proposed system; Fig.2 is a timing diagram illustrating the operation of the system.

System duplex high-speed short-wave radio, consisting of two transmitter / receiver sets 1, each of which contains the analog signal source 2 and the receiver analog signal 3, the compression device 4 and the expansion unit signal 5, the control unit 6, the output of which is connected to the control input of a device for compression of the signal 4, the modulator 7, the series-connected transmitter 8 and the transmitting-receiving antenna 9, and the first switch input signals l the demodulator 11, the output of which is connected to the input of the device of expansion of a signal 5, the demodulator clock 12, the output of which is connected to the input of the control unit 6, and the receiver 13, the output of which is connected in parallel with the input of the demodulator 11 and the input of the demodulator clock 12.

Each transmitter / receiver kit 1 includes an encoder 14, an input coupled to an output of the analog signal source 2, and the decoder 15, the output of which is connected to the input of the analog receiver signal 3, the discrete signal source 16 and the receiver of discrete signal 17, the first switch signal 181the switch output signals 19, the entrance, the first and second outputs of which are connected respectively with the output of the device extension of the signal 5, to the input of the decoder 15 and I�house recipient of discrete signal 17, and the control input of the switch output signals 19, which is an input source control signal transmitter / receiver set 1 combined with the control input of the first switch, the input signals 101output , the first and second inputs of which are connected respectively with the inlet of the expansion device 4, the output of the encoder 14 and to the output of the discrete signal source 16, in addition, each transmitter / receiver kit 1 contains a signal generator digital selective calling (DSC) 20 and second switch input signals 102, the output of which is connected to the input of the modulator 7, the output of which is connected to the input of the transmitter 8, the output of which is additionally connected with the signal input of the first switch of the radio signals 181the output of the control unit 6 is additionally connected with the control input of the first switch of the radio signals 181with the additional input of peredatchika 8 and with the additional input of the demodulator 11, and the first additional input of the control unit 6, which is the input control signal transmission unit transmitting or receiving set 1, combined with the control input of the second switch input signals 102and with the control input of the shaper signal of the DSC 20, the output of which is connected to the first input of the second switch input signals 102, a second input Kotor�th is connected to the output of a device for compression of the signal 4, first and second complementary outputs of which are respectively connected to a clock input of the shaper signal of the DSC 20 and the second additional input of the control unit 6, an optional third input which is the input of transmitter / receiver set to 1 in receive mode signal, and its fourth input connected to an additional output signal extensions 5, a further input coupled to the fifth additional input of the control unit 6.

The compression device 4 consists of a first memory block 211the input and output of which are respectively the input and output of a device for compression of the signal 4, the first counter records 221the first meter reading 231of the first block phase 241and the first unit clock 251whose input is combined with the input of the first memory block 211and the first and second outputs respectively connected to a clock input of the first counter records 221and with a clock input of the first counter reading 231, the output of which is combined with the control input of the read memory block 211and the first input of the first block phase 241, a second input is combined with the control input of the first memory block 211and the output of the first counter records 221, management,�allowing input coupled to the first output of the first block phase 24 1the second output of which is connected to the control input of the first counter reading 231and the second output of the first unit clock 251the third output and the third input of the first block phase 241are respectively the first additional output, the second additional output and the control input device signal compression 4.

The control unit 6 contains an element OR 26, first and second triggers 271and 272the third switch input signals 103the nor gate 28 and the signal decoder unit 29, the output of which is combined with the first input of the OR element 26 and to a first input of the first flip-flop 271, the output of which is connected to the control input of the third switch input signals 103, the output of which is connected to a first input of nor gate 28, a second input connected to the output of the second trigger 272the first input of which is connected to the output of the OR element 26 and the first and second inputs of the third switch input signals 103the second input of the first trigger 271combined with the second input element OR the second input of the second trigger 272first and second inputs of the decoder signal DSC 29 and the output of the nor gate 28 are respectively the input, second, first, third, fourth and fifth additional inputs and output of the us�device control 6.

The expansion unit signal consists of 5 of the second memory block 212the input and output of which are respectively the input and output devices signal extensions 4, second counter records 222, second counter reading 232that second unit phasing 242that second unit clock 252and block cyclic synchronization 30 whose input is combined with the input of the second memory block 222and the input of the second block clock synchronization 252first and second outputs of which are respectively connected to a clock input of the second counter reading 232and a clock input of the block cyclic synchronization 30 combined with a clock input of the second counter records 222and which is the additional output device extension signal 5, the output of the second counter records 222combined with the control input of the recording of the second memory block 212and the first input of the second block phase 242, a second input, combined with the control input of the reading of the second memory block 212and the output of the second counter reading 232the control input of which is connected to the first output of the second block phase 242the second output of which is connected to the control input of the second counter records 222and the third input of the second block phasing 24sub> 2connected to the output of the block cyclic synchronization 30.

The modulator 7 is in the form of series-connected series-parallel Converter 31, the input of which is the input of the modulator, and the processing unit of the OFDM signal 32, the output of which is the output of demodulator 7.

Transmitter 8 comprises a series-connected exciter 33, the input of which is input to the transmitter 8, the power amplifier 34 and harmonic filter 35, the output of which is the output of the transmitter 8, the control input of the exciter 33, which is an optional input to the transmitter 8, combined with the control input of the power amplifier 34 and the control input of the harmonic filter 35, which contains the band To filter nodes 36, the input and output of each of which via movable and fixed contacts of the respective two three-prong switches are connected to input and output harmonic filter 35, respectively, other fixed contacts of all 2 three-prong switch harmonic filter 35 connected to a common bus and a normally closed contact with the respective movable contacts, each band filter node 36 includes a main filter element 38, the entrance of which is an input band filter node 36, and an additional filter element 39, the output of which is output di�batonnage filter node 36, and the second switch signal, a signal input which is combined with the output 38 main entrance and additional filter elements 39, the signal output of the second switch signal 18 g are connected with a shared bus, and its control input is a control input of the frequency filter node 36, the control inputs of all band filtering nodes 36 is combined with the control input of the harmonic filter 35.

The demodulator 11 is made in the form of series-connected unit demodulating the OFDM signal 40, the input and the control input of which are respectively the input and the additional input of the demodulator 7, and a parallel-serial Converter 41, the output of which is the output of demodulator 11.

The demodulator clock 12 made in the form of series-connected amplitude detector 42, the input of which is the input of the demodulator clock regenerator 12 and 42, whose output is the output of the demodulator clock 12.

System duplex high speed shortwave radio operates as follows.

In the initial state (before duplex exchange analog phone or digital information), each transmitter / receiver set 1 (ACC) system is set to the mode "reception" by feeding the "Ctrl. PFP" (third additional�individual input of the control device 6) pulse signal in the form of short logic level "1". In the control device 6, the pulse signal throws the second trigger 272in a single (banning) state, and its output logic level "1" blocks the flow control signal from the output of the third switch 103to the output element OR-NOT", which is the output of the control unit 6. As a result, the logic level "0" from the output control unit 6, acting on the auxiliary input of the transmitter 8, the control input of the first switch of the radio signals 181and an additional input of the demodulator 11, blocks the output signal of the transmitter 8 to the input of the transmitting antenna 9 and simultaneously provides connectivity transceiver antenna 9 to the input of the receiver 13 through the first switch radio 181.

In this case, the received transmitting antenna 9 signal representing a combination of different noise, filtered by the selective circuits of the receiver 13 and with its release, for example, in digital form [4] is supplied in parallel to the inputs of the demodulator clock 12 and the demodulator 11, which operate in continuous mode (operation of the demodulator 11 is not blocked by the control signal on its secondary input).

Consider the system where the exchange of information between the two PEAK will be carried out with the use of sources of analog signals 2 and sex�ers analog signals 3.

To do this, enter "Ctrl. IP" (source control signal) of each SPC must be received logic level "0" when the first switch input signals 101connects to the input of the device for compression of the signal 4 the output of the encoder 14, which converts the analog PHONE signal from the output of the analog signal source 2 in a binary stream, and the switch output signals 19 connects the output of the expansion device signals 212to the decoder 15, which performs the reverse operation of converting the received binary stream into an analog PHONE signal, which is then fed to the receiver of the analog signal 3.

When the need for duplex communication session on the initiative of one of the subscribers corresponding to the CPD, for example, the first translates into "leading" by submitting to its input "Ctrl. DSC" (transmission control signal DSC) teams in the form of logic level "1". This level is passed onto the control inputs of the second switch input signals 102and the signal generator unit 20, provides with the launch of the shaper 20 and the switching of its output signal through the second switch input signals 102to the input of the modulator 7.

The DSC signal is generated as a binary sequence of coded and recurring digital address vyzyvaemogo� subscriber. The speed of signal transmission DSC equal to double the transfer rate of the main signal V=1/T bits/s (T - the duration of the original signal at the output of the first switch, the input signals 101either discrete binary or analog phone that is converted to a binary stream) and is equal to the repetition rate of clock pulses 2Ft PRDon the first additional output signal compression 4.

The duration of the signal DSC is determined by the duration of logic level "1" at the input "Control. The DSC and must be at least the time interval necessary for reliable detection signal DSC in the second (slave) ACC.

At the same time managing a logical "1" level input "Ctrl. DSC" leading CPD is served on the first additional input of the control unit 6, in which it is supplied to the second input of the OR element 26 and the second input of the first flip-flop 271by translating the first 271and second 272triggers respectively the unit and zero, a condition in which the output of the nor gate 28 through the third switch input signals 103is switched from the second additional output signal compression 4, the control signal is a square wave that defines recurrent cycles ("PTT") PPK with a frequency FC PRD("transfer"-Uro logical�tier "1", "reception"is a logical "0"level).

In each time interval "transfer" control of square wave transmitter 8 provides amplification by the power of the signal output from the modulator 7, filtering it from unwanted frequency components in one band To filter nodes 36 (band of transparency which allows the passage of the transmitted signal, which is connected through three-prong switch 37 to the input and output harmonic filter 35, and the radiation in the air with a transceiving antenna 9 quanta of the signal carrying information about the DSC signal.

Original modulating binary sequence DSC signal output from the second switch input signals South is input to serial-to-parallel Converter 31 of the modulator 7, which is divided into N parallel streams (N is the number of frequency channels of the modulator 7, in each of which the duration of the binary symbols is increased to N times).

The subsequent formation of multi-frequency OFDM signal in the band of the telephone channel (3100 Hz), the modulation of the transmitter 9, is performed in the processing unit of the OFDM signal 32 in a known manner, for example, as shown in [9].

In the intervals of the "reception" of the governing meander choking occurs exciter 33 and the amplifier 34 to the transmitter 8, and connected band� filter node 36 - the connection to the shared bus output main filter element 38 and the output of the additional filter element 39 via the closed second switch radio I82 performed on p-i-n-diodes.

This series resonant circuit band filter node 36, 38 consisting of a main and additional filter elements 39, is converted to the input of a transmit-receive antenna 9 in a parallel resonant circuit with a resonance frequency close to the cutoff frequency of the band filter of the node 36. The impedance of this parallel resonant circuit in the transparency band, band of the filter node 36 is inductive, the module whose magnitude exceeds the magnitude of the input impedance of the receiver 13 connected at intervals "reception" to transponder antenna 9 via the first switch of the radio signals 181performed on p-i-n-diodes.

Thus, in the intervals of the "reception" of the governing meander provides the necessary attenuation of the noise from the output of the transmitter 8 and the preservation of the sensitivity of the receiver 13.

Consider the work of the second (slave) ACC when receiving the signal of the CIP.

In the initial state (before the signal transmission, the first DSC ACC), the second ACC, as noted above, is �welcome."

When the transmission of the DSC signal and the subsequent transmission of the first main ACC discrete signal received by the receiver 13 of the second CPD the radio signal is a signal form corresponding to the multifrequency signal amplitude telegraphy (AT) [10].

Thus, in the received signal in addition to the basic information contained in the quanta of the OFDM signal, contains more and sinhronizacija about the boundaries of time intervals "reception":"transfer", which can be used to provide simultaneous operation of two ACC without giving peredavay signal excess synchroinformation.

The selection signal corresponding to the control of the first meander CPD is produced by the demodulator 12 of the second clock unit, wherein the first signal is detected by the amplitude detector 42 [10], then the AT - the signal is subjected to regeneration regenerator 43, where they are averaging temporal position of the fronts of packages another meander and restore its shape [8] as a Manager of a meander, providing the slave SPCS in antiphase with respect to the work of the master control panel.

Due to the periodicity and quite a large period of the cyclic repetition intervals "transmit-receive", regenerable meander can be restored with a high degree of reliability.

Simultaneously�about is the demodulation of the received signal demodulation unit of the OFDM signal demodulator 40 11, for example, a known method [9], then N synchronous binary stream is converted to parallel-serial Converter 41 into a single binary sequence with essential transmission rate V=2Ft PRM=2Ft PRD.

The detection signal DSC is performed by the decoder signal DSC 29 of the control unit 6, the signal input of which receives the output signal of the demodulator 11, and on its clock input a sequence of clock pulses with an auxiliary output device signal compression 4, synchronous with the sequence of binary symbols of the input signal.

Upon detection of the DSC signal in the demodulated signal quanta at the output of the decoder 29 is formed a pulse signal is short, the logical "1" level, which having at the first inputs of the first flip-flop 271and the OR element 26, 27 sets the first1and second 212triggers in the zero state, which provide switching take control square wave from the output of the demodulator clock 12 (via the third switch, the input signals 103and the nor gate 28) on the output of the control unit 6. This ensures that the remote translation of the second ACC state to "slave".

The detection signal DSC decoder signal DSC 29 may also be accompanied by audible or visual signals�the ization for the called subscriber's ID, after conducting a full-duplex PHONE radio communication can be carried out similarly to the phone.

After the translation of the second in ACC mode "slave, transmitter / receiver antenna 9 begins to radiate in the air quanta of information radio signal in the time intervals "transfer" regenerated managing meander.

Consider in more detail the process of establishing and maintaining full duplex radio communications.

At the end of the signal transmission, the first DSC control panel (if you change a single logic level to a zero level at the input "Control. DSC"), a second switch input signals 102connects to the input of the modulator 7 binary information sequence from the output of signal compression 4.

The compression device from 4 operates as follows.

The input device via the first switch input signals 101can go binary signals either from the output of the encoder (digital speech), or from the output of the discrete signal source (data) with a transfer speed of V bits/sec. For clarity of description, we assume that the input signal is a recurring combination of binary symbols type 1110010 (Fig.2A).

In the compression device signal 4 input signal is supplied simultaneously to the first block of synchronization (BPS) 251and the first memory block 211that �may be a random access memory with separate and independent control inputs for recording and reading information.

BPS 251is designed to generate a clock sequence of pulses to the first counter records 221and the first counter reading 232information, synchronized with the repetition rate of binary symbols of the input signal. In order to provide compression of binary signal in 2 times at the output of signal compression 4 it is necessary that the pulse repetition rate of reading was twice the frequency of following of pulses records Ft PRD.

Clock sequence Ft PRDand 2Ft PRD(Fig.2B, C) can be formed on the intermediate outputs of the frequency dividers of the BPS by dividing the frequency of the master oscillator having high stability. The phase of the pulses at the output of the dividers can be changed using the ring phase-locked loop by adding or subtracting the pulses in the sequence of pulses with higher frequency in accordance with changes in phase of the input binary symbols [8, p. 252].

Capacity M1and M2counters record (221) and reading (232) shall be determined as follows.

For the conduct of duplex radio communications each ACC should periodically switch from reception to transmission in the opposite phase relative to each other with frequency F=1/TCwhere TC- the duration of one cycle of transfer-acceptance" Duration of T Cis chosen based on the allowable delay value converted into the digital form of the telephone signal (0,1...0,3) and characteristics of the transceiver means. For radio discrete messages, the value of TCcan be selected in a wider range.

At the transmission rate of binary symbols digitized speech signal equal to V bit/s, the capacity of M1counter records 221or the number of binary symbols that are periodically recorded by the meter records 221in the memory block 211for one cycle of duration TC=M1T (binary symbols or clock intervals (T) frequency (Ft PRD) can be selected in the range: M1=TC/T~(0,1...0,3)·V And an integer M1must be even to ensure a delay on the value of TC/2 between the time of the recording and reading information in the first memory block 211.

To ensure compression of the original quantum signal with duration TC2 times is the following:

in the first half of each cycle (the time interval "reception" with a duration of TC/2) is a sequence of record (in the appropriate memory cells of the memory block 211) M1of binary characters being prepared for transmission of a quantum signal;

- in the second half of each cycle (the time interval "before�a")

of these cells of the memory block 211is serial readout of binary information at twice the speed and latency on the value of TC/2 with respect to the time of the recording.

This requires that the capacity of the M2meter reading 231was 2 times more capacitance meter record 221i.e. M2=2M1. The first M1cells addresses reading, consistently exchangeable at the output of the counter reading 231with a clock frequency of 2Ft PRDmust match the address of the memory locations in which the program will write M1the input symbols of the first memory block 211and next M1addresses reading should correspond to the cells, each of which is constantly written symbol "0".

Accordingly, the number of memory cells in the memory block 211the device for compression of the signal 4 should not be less than the magnitude of M2.

For clarity, in Fig.2A, the cycle time TCin clock intervals (TI) or the capacity of the M1counter records 221is taken to be M1=16, capacity meter reading 231-M2=32. As a counter recording 221in this case you can use 4-bit binary counter, and the counter reading 231- 5-bit binary counter.

Each state of the counter�ka record (in this case from 0 to 15) corresponds to a memory cell in the memory block 21 1to write a logical level corresponding to the binary symbol at the input of the memory block and stored in the cell in one cycle.

Fig.2G, d, g, h, and the logical levels of the memory cells with numbers 1, 2, 3, ..., 15, 16, corresponding numbered from 1 to 16 characters of the input binary sequence, conventionally divided into cyclic intervals of duration TC=16 each YEAR.

Information read from the memory cells is performed with delay on the value of TC12=8 (or 16 clock intervals of the pulse repetition frequency 2Ft PRD).

The necessary phase relationship between the counters read and write are set by the phasing unit 241by comparing the States of the counters (output bit binary numbers) on inputs 1 and 2 of block phasing 241and forced the initial installation of the meter recording 221to the desired state of the control signal from the first output of this block.

In addition, the phasing unit 241generates a control square wave with a repetition rate of binary levels (FC PRDthat controls the operation of the ACC, set the mode to "master". Because the outputs of counters for recording and reading are connected to the inputs 1 and 2 of block phasing 241the generation of a control signal is quite simple Rea�isoamsa by using an output signal of the MSB of the counter reading 23 1.

Fig.2 shows the output signal of a device for compression of the signal 4 of Fig.2l - managing the meander control unit 6 formed by the phasing unit 241in reverse video. Time intervals "transmission" and "reception" of the first (leading) ACC here designated respectively "PRD" and "PM".

Compressed 2 times quanta of the transmitted signal upon the termination of the team's single logic level input Control. DSC first ACC is supplied via a second switch input signals 102to the input of the modulator 7. To simplify the presentation of the principle of operation it is assumed here that the number of parallel frequency channels of the seal of the modulator 7 is N=8, respectively, the binary symbols of each quantum of the transmitted signal to the serial-parallel Converter 31 of the modulator 7 are distributed on eight channels for the formation of multi-frequency OFDM signal forming unit of the OFDM signal 32. In this case, the duration of each character in the input binary quantum increase 8 times, and in each time interval "transfer" (PRD) with a duration of TC/2 for each of the frequency channels of the OFDM signal is betrayed into the ether (the above method) information about the values of only two characters out of every 16 with the duration element of the signal on the air Te=4T.

Then the process of generating and transferring the quanta �informative OFDM signal similar to that described above when the transmission signal DSC.

Similarly, the above are the compression device 4 of the second signal (slave) of CPD and its subsequent device for the transmission quanta of the OFDM signal in the air during full-duplex transmission of information in the direction of the first CPD. However, the transfer of quanta reply digitized voice signal begins only after the regeneration of the demodulated control waveform and signal reception DSC.

Regenerated managing meander, similar to the control of the first meander of CPD, with a repetition rate of cyclic intervals FC PRM=FC PRDFig.2m taking into account the signal delay τ3at the time of propagation from the transmitter of the first ACC to the second receiver ACC. For clarity, it is assumed that the amount of delay corresponds to the duration of one take the binary character, i.e., τ3=T/2.

For forming the second ACC signal quanta, similar to the method of forming the first quanta of CPD, it is necessary to ensure alignment before reading binary symbols from the first memory block 211the device for compression of the signal 4 with the beginning of the time interval "transfer" regenerated managing meander. This is achieved by forced installation of the meter reading 231the necessary condition signal from the second output of the first block phase 241in accordance with the temporary position (phase) of intervals "transfer" regenerated managing meander served on the third control input of the first block phase 241after the detection signal DSC.

Fig.2H conventionally denoted by the temporal boundaries of quanta of the signal transmitted by the second unit, on the input of the first switch of the radio signals 181the first CPD taking into account the signal propagation delay from the second set to the first. Thus the total delay of the first GSHK quanta signal to transmitted is equal to 2τ3.

Consider the process of reception of the information signal first (leading) ACC after receiving the DSC signal of the second (slave) ACC.

We assume that in the second PPK original signal at the input of a device for compression of the signal 4 is similar to those previously discussed (Fig.2A), but with phase shift (temporary provisions) of the binary sequence in relation to the control meander (Fig.2m).

The first switch of the radio signals 181first ACC driven meander (Fig.2n) generated by the compression device 4, will be commuting in the time intervals PRM ("admission") to the input of the receiver 13 quanta received OFDM signal, truncated at the end by the value of 2τ3. The shape of the envelope of these quanta corresponds to the output of the demodulator clock 42, shown in Fig.2O (in the absence of any interference at the receiver input 13).

Block �modulatio signal 40 OFDM demodulator 11 performs the operation, reverse the operations performed by the processing unit of the OFDM signal. Thus its output is formed by N=8 binary streams that parallel-serial Converter 41 is converted to the total flow at a rate of 1/2Ft PRD(Fig.2P).

Shortening the duration of each take with ether quantum high-frequency signal by the first switch of the radio signals 181on the value of 2τ3on the noise immunity of the reception of binary information is not affected. The number of frequency channels N, determine the increase in the duration of the binary symbol (after doubling transmission speed) in each channel N times (Te=NT/2), is selected on the basis of providing required quantity of protection interval during high-speed transmission of information on KB communication channel [9], which is significantly more than the value of 2τ3.

Moreover, the decrease in duration is subjected to only a portion of the quantum signal corresponding to the last binary symbol in each channel (in our example for N=8 and TC=16 T. the latter is the second symbol of each channel is Fig.2O, in fact, the implementation of TCselect a lot more size 16 T, for example, at TC=0.2, N=8 and the speed of information transfer in KB channel 4800 bps, each quantum signal for each of the 8 frequency channels is transmitted L=0,·4800/8=120 binary symbols, i.e. the last in the channel will be the 120-th symbol).

From the output of the demodulator discrete signal is supplied to the expansion unit signal 5, which is the inverse operation of the compression signal. To implement this in the second block clock synchronization 252(similar to the previously reviewed by BTS 221) is the determination of the temporal position of the boundaries of the binary elements from the output of the demodulator 11 and the formation of the corresponding clock pulse sequences 2Ft PRMand Ft PRM(Fig.2P, t), providing simultaneous entry of information into the second memory block 212and its reading using a second meter record 222and second counter reading 232, the capacity of which is equal to the previously determined values M2and M1respectively.

The necessary delay of half the cyclic interval TC/2 moments reading binary information about the date of entry is provided by installing a second meter reading 232to the desired state of the control signal from the first output of the second block phase 242.

In addition, you need to start recording in the second memory block 212sequence of binary information symbols of each demodulated quantum signal (Fig.2P) coincided with PR�the course of the first binary symbol is demodulated quantum, i.e., the first memory cell block 212must be written first demodulated symbol of the quantum signal, the second cell in the next second character, etc.

The necessary phase of a second counter records 222is provided by the control signal from the second output of the phasing unit 242in accordance with the temporary position (phase) of cycle pulses FCA PRM(Fig.2C) output from the frame synchronization (BCS) 30. As a cyclic clock signal contained in each cycle of the demodulated signal, you can use a sequence of M1zero binary characters following after the last information symbol of the demodulated quantum signal (Fig.2P).

In order to eliminate the appearance at the output of demodulator 11 "false" symbols "1" after the last information symbol of each demodulated quantum signal (due to the action of noise at its input) operation unit demodulating the OFDM signal 40 is blocked control square wave output control unit 6 in the intervals "PRD" (Fig.2l).

To ensure the work BCS on its information inputs the signal output from the demodulator 11, and on its clock input a clock pulse sequence from the second output of the second 25 BPS2. As BCS can be used BSS given in [11]

The result of reading information from the second memory block 212shown in Fig.2U. This binary signal is switched by the switch output signals 19 to the input of the decoder 15, which is converted to an analog PHONE signal, which is then fed to the receiver of the analog signal 3.

Similarly, when a reception of the information signal with a second (slave) CPD in the process of doing a full-duplex radio communication after receiving the DSC signal. Unlike the first information reception unit, shortening of the received signal quanta is not happening due to the fact that the time intervals "PRM" regenerated managing meander coincide with the duration of quanta of the binary sequence of demodulated signal.

At a duplex exchange of discrete information input "Ctrl. IP" (source) of each SPC serves a logical "1" level, which provides the connection to the input of a device for compression of the signal 4 of the discrete signal source 16, the first switch input signals 101and the switch output signals 19 to the output of the device of expansion of a signal 5 to the input of a recipient of a discrete signal 17. The process of conducting a full-duplex radio communication using discrete sources 16 and receivers 17 signals ACC same as described above.

With PR�ticheskoj point of view, all components of the system high-speed duplex radio realizable, what are the agreed upon statement of work system. The encoder and decoder are transmitting and receiving parts of commercially available vocoders [12, 13], which convert speech signal into binary stream with speeds of 600, 1200, 2400, 4800 bit/s.

The modulator and demodulator are receiving and transmitting parts of commercially available high-speed modems parallel type to transfer data at speeds up to 9600 bps in-band telephone channel (3100 Hz).

The implementation of the present invention - system high-speed duplex radio communication, will allow to achieve the following advantages with respect to known systems of duplex radio communications [1, 2]:

- improving the noise immunity of the reception of telephone messages by reducing bandwidth not less than twice and implementation of the modulator and demodulator in the system through the application of the method of sealing with orthogonal frequency division (OFDM - Orthogonall Frequency Division Multiplexing) to achieve the greatest density padding frequency band using OFDM;

- increase communication bandwidth by eliminating special clock that is input in the resulting transmitted signal, and use for duplex radio communication signal OFDM with high spectral density toge�the analog PHONE signal class radiation AZE with significantly lower spectral density;

- expand the functionality of the system by introducing additional technical tools and the use of OFDM, which provides full-duplex exchange in multipath KB channel like telephone and high-speed discrete messages.

- increasing the number of stations that can operate at the same operating frequency, due to the introduction of technical means of transmission and reception of signals DSC;

- increase range by reducing input noise own transmitter.

In conclusion, we note that the use of the proposed system duplex high-speed short-wave radio will allow you to practically implement the full-duplex radio transmissions on the same frequency as voice and high speed data KB Radiotracker different length.

Sources of information:

1. The bidirectional communication device, Best collection designs hams, M.: DOSAAF, 1975, Pp. 79-80.

2. Pat. 2190301 RF System duplex radio communication / A. N. Yur'ev, B. N. Yaroshevich, V. I. Levchenko, B. G. Shadrin. - 2002.

3. GOST R-50016-92 Requirements for the width of the frequency band and out-of-band radiation of radio transmitters.

4. Berezovsky V. A., Dulcet I. V., Savitsky O. K. Modern decameter radio: equipment, systems, and complex in�Sy / edited by V. A. Berezovsky. - M.: Radio Engineering, 2011. - 444 p.

5. Makarov S. B., Cicin I. L. the Transfer of discrete messages over radio channels with limited bandwidth. - M.: Radio and ligature, 1988. - 304 p.

6. Kalinin A. I., Kuznetsov, E. L., radio wave Propagation, Moscow, 1971.

7. Cherenkova E. L. Distortion of Telegraph signals in the transmission on short waves. Svyazist, 1955.

8. N. And. Sartakov, V. M. Edany, V. V. Gribin Shortwave radio receivers. M: Communications, 1971. - 288 p.

9. A. M. Kiselev, V. V. Makhotin, N. Yu. Ryzhov, V. Shatalov Way of implementing high-speed parallel modem // telecommunication Equipment / Omsk research Institute of instrument engineering. - 2006. Vol.11 - Pp. 5-15.

10. Gonorovsky I. S. Radio circuits and signals. M.: Owls. radio, 1977. - 608 p.

11. A. S. No. 1138954 Device frame synchronization / B. G. Shadrin. - 1985.

12. Apparatus for digital data transmission MS-5 / edited by A. M. Approach and Y. B. Okunev. - M.: Communication, 1970. - 152 p.

13. Chamberlain M. W. And 600 bps MELP vocoder for use on hf channels.. // IEEE. 2001. URL: http://ieeexplore.ieee.org.

1. System duplex high-speed short-wave radio, consisting of two transmitter / receiver sets, each of which contains the analog signal source and the receiver of the analog signal, the device of signal compression and expansion unit signal, the control unit, the output of which is connected to the control input us�device of signal compression modulator serially connected to the transmitter and a receive / transmit antenna and the first switch input signals, the demodulator, the output of which is connected to the input of the device extension of the signal, the demodulator clock, the output of which is connected to the input of the control unit, and the receiver, the output of which is connected in parallel with the demodulator input and a demodulator input signal, characterized in that each transmitter / receiver set inputs of the encoder, the input of which is connected to the output of the analog signal source, and a decoder, the output of which is connected to the input of the recipient of the analog signal, the discrete signal source and the recipient of a discrete signal, the first switch of the radio signals, the switch output signals, the input, the first and second outputs of which are connected respectively with the output of the extension signal to the input of the decoder and to the input of the recipient of a discrete signal, and the control input of the switch output signals, which input source control signal transmitter / receiver kit, combined with the control input of the first switch input signals, an output, first and second inputs of which are connected respectively with the input devices of expansion of a signal, with the output of the encoder and the output of the discrete signal source, in addition, cold roll forming machine�l signal digital selective calling (DSC) and second switch input signals, the output of which is connected to the input of the modulator, the output of which is connected to the input of the transmitter, the output of which is additionally connected with the signal input of the first switch of the radio signals, the output of the control unit is additionally connected with the control input of the first switch of the radio signals, with the additional input of the transmitter and with the additional input of the demodulator, and the first additional input of the control unit, which input the control signal transmission unit transmitting or receiving set, combined with the control input of the second switch input signals and to a control input of the shaper of the DSC signal, the output of which is connected to the first input of the second switch input signals, a second input connected to the output of signal compression first and second complementary outputs of which are respectively connected to a clock input of the shaper of the DSC signal and the second additional input of the control unit, the third additional input which is the input of transmitter / receiver set up to receive the signal, and its fourth input connected to an auxiliary output of the device of expansion of a signal input coupled additionally with the fifth additional input of the control unit.

2. System duplex high-speed short-wave radios�yahzee according to claim 1, characterized in that each transmitter / receiver set the device to compress the signal consists of a first memory block, the input and output of which are respectively the input and output of a device for compression of the signal, the first counter of the record, the first counter reading of the first block phasing and the first unit clock whose input is combined with the input of the first memory block, and first and second outputs respectively connected to a clock input of the first counter with a clock input of the first counter reading, the output of which is combined with the control input of the read memory block and the first input of the first block phasing, a second input is combined with the control input of the first memory block and the output of the first counter records, the control input of which is connected to the first output of the first block phase, the second output of which is connected to the control input of the first counter reading, and the second output of the first unit of synchronization, the third output and the third input of the first block of phase are respectively the first additional output, the second additional output and the control input of a device for compression of the signal.

3. System duplex high-speed short-wave radio communication according to claim 1, characterized in that each transceiver complexing�the control unit comprises an OR element, the first and second triggers, the third switch input signals, the nor gate and the decoder of the DSC signal, the output of which is combined with the first input of the OR gate and to a first input of the first trigger, the output of which is connected to the control input of the third switch input signals, the output of which is connected to a first input of a nor gate, a second input connected to the output of the second trigger, the first input of which is connected to the output of the OR element and the first and second inputs of the third switch input signals, a second input of the first trigger, combined with a second input of the OR, the second input of the second trigger, the first and second inputs of the decoder of the DSC signal and the output of the nor gate are respectively the input, second, first, third, fourth and fifth additional inputs and output of the control unit.

4. System duplex high-speed short-wave radio communication according to claim 1, characterized in that each transmitter / receiver set the expansion unit signal consists of a second memory block, the input and output of which are respectively the input and output devices of expansion of a signal, a second counter records the second counter reading of the second block phase, the second block clock block and frame synchronization, the input of which is combined with the input of the second BL�ka memory and the input of the second block clock synchronization, the first and second outputs of which are respectively connected to a clock input of the second counter reading and a clock input of the block cyclic synchronization, combined with a clock input of the second counter entry and an exit of the device of expansion of a signal, the output of the second counter records combined with the control input of the recording of the second memory block and to a first input of the second block phase, a second input is combined with the control input of the reading of the second memory block and the output of the second counter reading, the control input of which is connected to the first output of the second block phase, the second output of which is connected to the control input of the second counter records and the third input of the second unit of phase is connected to the output of the frame synchronization.

5. System duplex high-speed short-wave radio communication according to claim 1, characterized in that each transmitter kit modulator is made in the form of series-connected series-parallel Converter, the input of which is the input of the modulator, and the processing unit of the OFDM signal, the output of which is the output of the demodulator.

6. System duplex high-speed short-wave radio communication according to claim 1, characterized in that each transmitter / receiver kit transmitter contents�t series-connected exciter, input which is the input to the transmitter, power amplifier and harmonic filter, whose output is the output of the transmitter, the control input of the exciter, which is an optional input to the transmitter, combined with the control input of the power amplifier and the control input of the harmonic filter, which contains the band To filter nodes, the input and output of each of which via movable and fixed contacts of the respective two three-prong switches are connected to input and output harmonic filter, respectively, the other fixed contacts of all 2 three-prong switch harmonic filter connected to a common bus and a normally closed contact with the respective movable contacts, each band of the filter node includes a main filter element, the entrance of which is an input band filter node, and an additional filter element, whose output is the output band of the filter node and the second switch of the radio signal input of which is combined with the output of the main entrance and additional filter elements, the signal output of the second switch of the signals connected to the shared bus, and its control input is a control input of the frequency filter node, the control inputs of all band filtration combined with the control input of the harmonic filter.

7. System duplex high-speed short-wave radio communication according to claim 1, characterized in that each transmitter / receiver kit demodulator made in the form of series-connected unit demodulating the OFDM signal, the input and the control input of which are respectively the input and the additional input of the demodulator, and a parallel-serial Converter, the output of which is the output of the demodulator.

8. System duplex high-speed short-wave radio communication according to claim 1, characterized in that each transmitter / receiver set the demodulator clock is made in the form of series-connected amplitude detector, the input of which is the input of the demodulator clock, and regenerator, whose output is the output of the demodulator clock.



 

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45 cl, 18 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to satellite communication. A communication satellite transmits a high-power content beam to different geographic areas at different moments in time. A holding beam allows a receiving device to remain synchronised with the communication satellite when the high-power content beam is directed to another location. The holding beam can be a lower-power beam. Determination that the high-power content beam can be received can be performed based on information in the holding beam. Determination that the high-power content beam can be received can be performed by monitoring intensity of a frequency signal associated with the high-power content beam.

EFFECT: enabling transmission of the content within a large area.

19 cl, 7 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to information transmission. Disclosed is a receiver for receiving information signals in a text format, which receives the information content using the text format divided into information objects, wherein the receiver is a radio broadcast receiver and the text information signal is a text information signal for forwarding in a carousel data transmission mode, wherein the information objects are transmitted in the carousel mode, which includes a user-controlled selector; and a processor designed to analyse an information object, which includes a selected object ID from a plurality of unique objects IDs, which determines whether the analysed information object is a link object which supports automatic processing, comprising link items indicating other object IDs from the plurality of the unique objects IDs; if so, the method includes verifying if conditional data associated with the link items for the link object supporting automatic processing are satisfied; and automatically assigning an ID to an object indicated by the link item for the link object supporting automatic processing, having conditional data associated with the conditional data that were satisfied for a recently selected object ID, or providing a user with a presentation relating to the link object supporting automatic processing using a method which depends on the verification result and assigning an ID to the object indicated by the said link item for the link object supporting automatic processing, selected by the user using the user-controlled selector as a newly selected object ID.

EFFECT: reduced navigation costs when transmitting text information.

22 cl, 8 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to hybrid broadcast broadband television (HBBTV), particularly an information processing apparatus, capable of receiving data via broadcast or over a network, as well as a data management method which is based on information defining the life cycle of data. A browser acquires, via a network, description information which includes second defining information (XML-AIT) having content equivalent to a broadcast application information table (AIT) defining a life cycle of a broadcast application while voice over data (VoD) content is reproduced after being switched from the broadcast application. The browser manages the broadcast application based on the XML-AIT and resumes the reception of the broadcast application after the reproduction of the VoD content is ended. The processing for separating two transport streams at the same time becomes unnecessary, and one demultiplexer only needs to be provided.

EFFECT: realising processing for switching a reproduction state from broadcast data to network data and resuming the reproduction of the original broadcast data.

6 cl, 3 dwg

FIELD: physics, communications.

SUBSTANCE: invention relates to communication. In the method, when performing transmission power planning for a broadcast control channel (BCCH) carrier, it is determined whether a traffic channel is in an idle state, it is determined whether the traffic channel is in a discontinuous transmission DTX silent period, when the traffic channel is in a non-idle state; and transmission power of channels configured on the BCCH carrier in some of time slots is reduced when the traffic channel is in the idle state or when the traffic channel is in the non-idle state and is in the DTX silent period. With the present invention, since the transmission power can be reduced according to demand of the planned part of time slots, the power consumption on the BCCH carrier can be optimised or its influence on the power consumption of the base station can be minimised while maintaining operating performance of the whole network.

EFFECT: base station power saving method and system are disclosed.

6 cl, 1 tbl, 6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: in the cross-repeater the interaction of radio networks of a single-frequency and two-frequency simplex operating in two different frequency ranges, and a conference communication radio network is implemented. The cross-repeater contains two pairs of simplex radio stations connected to the power unit and to each other through an interface which in each pair through the duplex filter are connected to common antenna and operated at unmatched frequencies of conditional range. Interface has multiport adders - two per radio station, the low-frequency output of the receiver of each of which is connected to the noise suppressor and through the respective adders with the input of submodulator of transmitter of the radio stations operating in one of frequency ranges, and the output of the noise suppressor of each of radio stations through the respective adders is connected to the control transmitter of radio stations operating in another frequency range. Pairs of simplex radio stations can operate in the ranges respectively 160 MHz and 460 MHz.

EFFECT: expansion of scope of application of repeaters for organising of interaction of several radio networks operating in different frequency ranges.

2 cl, 3 dwg

FIELD: physics.

SUBSTANCE: instead of the prototype-valid estimation an information-bearing cyclic time shift of an m-sequence in each beam separately and averaging of results of said estimation across all beams, the present invention includes coherent accumulation (each separately) of an information pulse arriving on all beams, and generating the desired estimate of the time shift of the m-sequence based on the single-beam information pulse generated as a result of said coherent accumulation.

EFFECT: low decoding error probability.

3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to reception of broadband signals under the action of concentrated interference in a reception band. The device includes n band-pass filters of a first group (11-1n), a unit for calculating weight coefficients (2), n multipliers of a first group (31-3n), two adders (4, 14), a matched broadband signal filter (5), a rank vector computer (6), two spectral rearrangement units of a first type (7, 12), n reference voltage sources (81-8n), n multipliers of a second group (91-9n), two spectral rearrangement units of a second type (10, 13), n band-pass filters of a second group (111-11n).

EFFECT: minimising distortion of the correlation function of a received signal after the signal passes through an adaptive filter while maintaining the matched filtering principle.

9 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to receiving-transmitting devices and can be used in command radio links to transmit command information from a base station to on-board (and in the reverse direction). In a command radio link digital modem during transmission, a signal from the output of a modulator is subjected to spectrum spreading with multiplication using a first multiplier of a low-speed information signal coming from the output of the modulator, with a pseudo-random sequence of bipolar pulses, which is transmitted from a pseudo-random sequence generator. During reception, samples of the complex envelope of the received signal from ADC modules with frequency arrive at a digital down-converter (DDC), which provides filtration in the working frequency band and multiplies the signal with reference oscillation from a digital synthesizer (DDS) in order to compensate for Doppler shift. Further, the signal arrives at a device for searching for a noise-type signal based on delay and frequency, which enables detection of a noise-type signal. Once a noise-type signal is detected, the device for searching for a noise-type signal based on delay and frequency re-launches the means of tracking delay of the noise-type signal to provide initial synchronisation of the reference pseudo-random sequence with the pseudo-random sequence of the received noise-type signal. The system for tracking delay clocks the pseudo-random sequence generator to maintain clock synchronisation of the reference pseudo-random sequence and the pseudo-random sequence of the received noise-type signal (tracking the noise-type signal on delay). The reference pseudo-random sequence is multiplied by the multiplier with the complex envelope of the received noise-type signal and transmitted to a coherent demodulator. The coherent demodulator provides elimination of residual offset on frequency and phase of the received signal and the local reference oscillation generator, signal accumulation over the duration of the noise-type signal and a relaxed solution on the transmitted bit. The relaxed solutions are further transmitted to a noise-immune code decoder. The decoded data are transmitted through a switch to the output of the digital modem. If the encoding mode is turned off, the data from the output of the modulator are immediately transmitted to the output of the digital modem.

EFFECT: maintaining working capacity and main characteristics in the presence of Doppler frequency shift of a signal in channels and frequency instability of reference generators.

7 dwg, 2 tbl

FIELD: radio engineering, communication.

SUBSTANCE: proposed procedure consists in execution of terminal assigned programme at the server data processing module, compression and encoding of said data to be output to terminal appropriate device. Server transceiver module sends said data to said terminal. Said terminal receives said data, decompress it, decodes and displays at terminal output device. Extra data, if any, received from terminal input device, said terminal compresses it, encodes and forwards to said server by terminal transceiver module. Note here that said server uses its transceiver module to receive, decompress and decode said data and loads it into software.

EFFECT: enhanced performances of the terminal.

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used to provide the management of a ship with real-time tactical communication and interaction communication. The integrated communication system for a surface ship integrates communication subsystems. The system is designed to provide the management of a ship with real-time tactical communication and interaction communication through automated generation and provision of different channels and radio communication paths.

EFFECT: high quality of communication channels and reception of information, reliability and robustness of the system.

1 tbl, 1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: digital radio communication on railway transport comprises a radio receiver and hardware-software of the automated workstation of the radio communication electrical officer, connected to a digital IP network, and, mounted on each locomotive, a locomotive radio station with a receiving-transmitting device and a talk-back panel; the radio station of each locomotive and portable radio stations are configured to operate according to the DMR standard. The IP network is connected to repeaters mounted at each station and talk-back panels of process managers at each locomotive are provided with safety devices. Each locomotive radio station further includes a unit for input/output of information of first and second timeslots, a talk-back panel of the locomotive driver, a safety device, a unit for generating diagnostic data of the state of the locomotive, a receiving-transmitting device, a repeater with a radio receiver which enables to separate information according to areas of responsibility of process managers at the station, talk-back panels of which are made with a terminal in the form of an all-in-one machine with a Touch-Screen function and capable of switching screen forms.

EFFECT: high quality of voice communication and broader functional capabilities of the system.

5 cl, 1 dwg

Radio system // 2543470

FIELD: radio engineering, communication.

SUBSTANCE: radio system (RS) comprises a ground radio signal transmitting system with N≥5 radio signal transmitting stations, coordinates of phase centres of antennae of which are known at radio facilities (RO). The transmitting stations are configured for synchronised ordered transmission of radio signals in series, with given separate features and with given time delays between radio signals, which provide ordered arrival of radio signals at the RO, located at any point in a service area. Each RO comprises a radio signal receiving device configured to receive and identify radio signals of the corresponding transmitting station, a recorder for recording the reception time thereof in a time reference system specified at the RO and an information system configured, based on said coordinates and reception time of radio signals in the series, taking into account said time delays between radio signals, to measure coordinates of phase centres of the antenna of the RO according to the proposed measurement equations.

EFFECT: high efficiency and simplification of corresponding radio systems.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: broadcast and public announcement system using navigation satellites, comprising a broadcast centre and a unit for generating emergency information, connected through a generating unit with a transmitting ground-based satellite station, at a geostationary satellite - a unit for receiving ground signals, connected to an intersatellite communication unit, at navigation satellites - series-connected intersatellite communication receiving equipment, a unit for converting a signal into an L-range signal and a transmitting unit. A user receiving device is connected through a broadcast signal demodulating unit with a sound reproducing unit and through a warning signal demodulating unit with an emergency display unit.

EFFECT: facilitating broadcast and public announcement on emergency situations at any point on the Earth.

1 dwg

Personal computer // 2247470

FIELD: computer equipment hardware for global computer network.

SUBSTANCE: novelty is that proposed personal computer incorporates provision for wireless access to input of service provider computer due to newly introduced transceiver device incorporating sine-wave oscillator, frequency synthesizer, transmission channel incorporating switch, carrier amplifier, single-pole signal shaper, output amplifier, antenna, pulse shaper, second switch and data request signal circuit, as well as receiving channel incorporating receiving unit, radio-frequency amplifier, double-pole amplitude detector, inverter, delay circuit, pulse shaper, register, and two decoders. Data signal transmission and reception speed is 26 Mbit/s.

EFFECT: enhanced data exchange speed.

1 cl, 5 dwg

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