The wireless link connection with the reuse frequency

 

The invention relates to radio communications and can be used in space and terrestrial radio links with reuse frequency. The proposed line of communication with reuse frequency is bilateral. It is the compensation signal interference from a local source using rings of negative feedback. The use of two antennas for two-way communication allows you to provide (compared to the prototype) reduction in cost of the device as a whole. The proposed line contains two identical transceiver (I, II). Each of the transceivers comprises a generator main message (1), the power splitter (2), amplitude modulators (3,4), anti-phase amplifier (5), the antenna A1, circulators (8, 11), the adder (12), subtractive unit (13), synchronous detectors (14, 25, 34), the amplitude limiter (15), the demodulator key messages (16), directional couplers(17, 19, 21, 22, 28, 35, 37, 39, 40, 31), managed phasers (18, 36), controlled attenuators (20, 38), phasers (23, 32), integrators(24, 26, 33, 29), phase detectors (27, 30). 2 Il.

The invention relates to radio communications and can be used in space and terrestrial radio links awning U.S. No. 4087818 and the Japan patent No. 54-41851), in which reuse frequency (pich) is achieved by ensuring the orthogonality of polarization of the two transmitted signals simultaneously with circular or linear polarization. However, in this method of communication with the peach requires the use of a pilot signal to ensure high standards for the orthogonal polarization of transmitted signals. The application of the pilot signal requires allocation of additional frequency channel that does not coincide with the frequency spectrum of the transmitted signal, which reduces the noise immunity.

Also known communication system.with. No. 1141978), in which the main and additional information are transmitted respectively in the horizontal and vertical planes of polarization. However, this device has a low noise immunity.

The closest in technical essence to the present invention is the communication system A. with. No. 1385305 adopted for the prototype.

Functional diagram of the device of the prototype is shown in Fig.1, where indicated:

1 - signal generator, 2 - power splitter, 3, 4-amplitude modulators, 5 - phase with the amplifier, 6, 7 - irradiators transmitting antenna, 8 - transmit antenna, 9, 10 - irradiators receiving antenna 11 is ctor, 17 - amplitude limiter, 18, 19 - lowpass filter 20 to the control unit the position of the axes of polarization, 21 - key, 22 - phase detector, 23 - Phaser, 24, 25 of the delay line 26 to the comparator.

The signal generator 1 generates a signal modulated in frequency or phase of the main messages. He arrives at the input of the power splitter 2, which branches into two channels that have amplitude modulators 3 and 4, is made in the form of high-frequency amplifiers. In them the amplitude of the incoming signal varies in opposite phase according to the law passed additional messages using the voltage charged to out-of-phase amplifier 5. These signals arrive at the inputs of irradiators 6 and 7 of the transmitting antenna 8. The transmitting antenna 8 may be made in the form of array antennas with appropriate agents. Irradiators 6 and 7 create fields with orthogonal linear or circular polarization. The signals emitted by the transmitting antenna 8, are receiving antenna 11. It irradiators (pathogens) 9 and 10 are mutually orthogonal linear or circular polarization. Receiving antenna 11 with irradiators (pathogens) 9 and 10 are identical transmission.

As a demodulator 16 uses the, appearing in the input mixture signal interference under the action of both fluctuation and pulse interference that can improve the noise immunity when exposed to complex interference on the units and tens of decibels depending on the base signal.

The regulatory system works in the case where the orthogonality of the incoming signals disturbed.

The drawback of the prototype is that the information transmitted Scoreand SSSis transmitted only in one direction.

To eliminate this drawback in the device containing the first transceiver, which contains connected in series signal generator key messages and the power splitter, the first and second outputs of which are connected with inputs of the first and second amplitude modulators, respectively, the antiphase input of the amplifier is the input signal additional messages, and its first and second outputs connected to the second inputs of the first and second amplitude modulators, respectively, and the amplitude limiter and demodulator key messages whose output is the output signal of the main messages, the first phase and synchronous detectors, and first phase shifter, in addition to the activities of the antenna, each with exciter and exciter entered the second transceiver, identical to the first, each of them entered sequentially connected to the first directional coupler and the first circulator, the first output of which is connected to the exciter (feed) of the first antenna and the second output circulator - with the input of the fifth directional coupler and connected in series to the first controlled phase shifter, the second directional coupler, the first controlled attenuator, third and fourth directional couplers, and the second input of the fourth directional coupler is connected with the third output of the fifth directional coupler, the first output of which is connected in series through the second synchronous detector and the first integrator is connected to a second input of the first controlled attenuator, the second output of the third directional coupler connected to the second input of the second synchronous detector, in addition, the second output of the fifth directional coupler connected in series through the first phase detector and the second integrator is connected to a second input of the first controlled phase shifter, the first input of which is connected to the second output of the first napravlennoj the second input of the first phase detector, the input of the first directional coupler connected to the output of the first amplitude modulator, the output of the fourth directional coupler connected to the first input of the adder, in addition, connected in series to the sixth directional coupler, the second controlled phase shifter, the seventh directional coupler, the second controlled attenuator, the eighth and ninth directional couplers, the output of the latter is connected with the second input of the adder, the second output of the eighth directional coupler connected in series through the third synchronous detector and a third integrator connected to the second input of the second controlled attenuator, the second output of the seventh directional coupler through a second phase shifter connected to the second input of the second phase detector, the first tenth of a directional coupler connected to a second input of the third synchronous detector, the second output of the tenth directional coupler connected in series through the second phase detector and the fourth integrator connected to the second input of the second controlled phase shifter, while the third exit tenth of a directional coupler connected to a second input of the ninth directional otvetitl the cerned connected to the second irradiator (agent) of the first antenna, the output of the sixth directional coupler connected to the first input of the second circulator, in addition, the output of the adder through the amplitude limiter connected to the inputs of the demodulator of the main messages and the first synchronous detector, the output of the second amplitude modulator connected to the input of the sixth directional coupler, the output of the subtractive unit is connected to a second input of the first synchronous detector whose output is the output signal of the additional message, the output of the demodulator is the output signal of the main messages.

In Fig.2 shows a functional diagram of the proposed device, where indicated:

I first transceiver;

II - the second transceiver;

1, 1Igenerator key messages;

2, 2Iy - power;

3, 3I, 4, 4Ithe first and second amplitude modulator;

5, 5I- anti-phase amplifier;

A1, A2 of the first and the second antenna;

6 - exciter (feed) of the first antenna;

10 - irradiator (pathogen) of the first antenna;

7 - irradiator (pathogen) of the second antenna;

9 - exciter (feed) of the second antenna;

8, 8I, 11, 11Ithe first and the second circulator;

12, 12I- amrany detector;

15, 15Iis the amplitude limiter;

16, 16I- demodulator key messages;

17, 17I, 19, 19I21, 21I, 22, 22I, 28, 28Ithe first, second, third, fourth and fifth directional coupler;

18, 18I, 36, 36Ifirst and second controlled phase shifter;

20, 20I, 38, 38Ifirst and second controlled attenuator;

23, 23I, 32, 32Ithe first and second phase shifter;

24, 24I, 26, 26I, 33, 33I, 29, 29Ithe first, second, third and fourth integrator;

27, 27I, 30, 30Ithe first and second phase detector;

35, 35I, 37, 37I, 39, 39I, 40, 40I, 31, 31Isixth, seventh, eighth, ninth and tenth directional coupler.

The first transceiver I proposed device contains connected in series signal generator key messages 1 and the power splitter 2, the two outputs of which are connected with the first inputs of the first 3 and second 4 amplitude modulator, the second inputs of which are connected with the corresponding outputs of opposite phase of the amplifier 5, the inlet of which is the input of additional messages. The output of the first amplitude modulator 3 through the first directional first antenna A1.

The second output of the first directional coupler 17 connected in series through the first controlled phase shifter 18, the second directional coupler 19, the first controlled attenuator 20, the third 21 and 22 fourth directional coupler is connected with the first inputs of the adder 12 and subtractive unit 13.

The second output of the first circulator 8 connected in series through the fifth directional coupler 28, the second synchronous detector 25 and the first integrator 24 is connected to a second input of the first controlled attenuator 20.

The second output of the third directional coupler 21 is connected with the second input of the second synchronous detector 25. The second output of the fifth directional coupler 28 connected in series through the first phase detector 27 and the second integrator 26 is connected to a second input of the first controlled phase shifter 18. The third output of the fifth directional coupler 28 is connected to a second input of the third directional coupler 22. In addition, the second output of the second directional coupler 19 through the first phase shifter 23 is connected to a second input of the first phase detector 27.

The output of the second amplitude modulator 4 is connected to the input of the sixth directional coupler 3M 10 of the first antenna A1.

The second output of the sixth directional coupler 35 connected in series through the second controlled phase shifter 36, the seventh directional coupler 37, the second controlled attenuator 38 and eighth directional coupler 39 is connected to the first input of the ninth directional coupler 40, the output of which is connected with the second inputs of the adder 12 and subtractive unit 13. The second output of the second circulator 11 connected in series through the tenth directional coupler 31, the third synchronous detector 34 and the third integrator 33 is connected with the second input of the second controlled attenuator 38. The second output of the tenth directional coupler 31 is connected in series through the second phase detector 30 and the fourth integrator 29 is connected with the second input of the second controlled phase shifter 36. The second output of the seventh directional coupler 37 through the second phase shifter 32 is connected with the second input of the second phase detector 30. In addition, the output of the adder 12 through the amplitude limiter 15 is connected to the inputs of the demodulator key messages 16 and the first synchronous detector 14, the output of which is the output signal of the additional messageSS. The output of the subtractive unit is the next Score.and the antiphase input of the amplifier 5 is input additional messages Score.

The output of the demodulator 16 is the output of the main messages Score.and the output of the first synchronous detector 14 output additional messages Score.

The proposed device is as follows.

Generator 1 generates the signal of the main messages, phase modulated primary message

where Uc- constant signal amplitude;

(t) is a function of the phase change signal corresponding to the phase modulation the main message Score.

This signal is applied to the power splitter 2, where the separation of its power in half and each half is issued respectively on the two outputs of the amplitude modulators 3 and 4. In them the amplitude of the incoming signal varies in opposite phase according to the law passed additional messages SSSusing the voltage charged to out-of-phase amplifier 5. The signals at the outputs of the amplitude modulators 3 and 4 will be equal to

Where U1- constant amplitude;

f(t) - function and is forced to the inputs of pathogens (irradiators) 6 and 10 of the first antenna A1, which can be implemented in the form of a reflector antenna with two vibrators (irradiators) or in the form of array antennas with appropriate agents (irradiators). Pathogens (irradiators) 6 and 10 create fields with orthogonal linear or circular polarization.

The signals emitted by the first antenna A1, accepted the second antenna A2. It irradiators (pathogens) 9 and 7 also have orthogonal linear or circular polarization. The antenna A2 is identical to the antenna A1. Outputs irradiators (pathogens) 9 and 7 will receive signals

With the amplitude modulator 3, the signal at the first directional coupler 17, and with the amplitude modulator 4 is on the sixth directional coupler 35.

The device sends information to both sides, i.e. it is a two-way radio line connection. When operating two-way radio part of the local power of the transmitter through the circulator 8 goes to the input of the receiver, thus deteriorating the noise immunity of the radio link.

To reduce interference, directed to the input of the receiver from the local transmitter, it is necessary to fourth directed coupler 22 (summate the AZE.

In the result of the addition is the compensation of the interference signal from the local transmitter.

For forming the compensating signal of the transmitter power is branched off in the first directional coupler 17 (sixth 35) and connected in series through the first controlled phase shifter 18 (second 36), the second directional coupler 19 (37 seventh), controlled attenuator 20, (the second 38 and third directional coupler 21 (eighth 39) is input to the fourth directional coupler 22 (adder 12, the ninth directional coupler 40).

Calculating the phase and amplitude of the compensating signal is based on the results of measurement of phase difference and amplitude of the compensating signal prolase”.

Leading with rings negative feedback these differences to the minimum values, achieve maximum compensation interfering signal from its own transmitter.

The phase of the compensation signal produced by the ring phase adjustment, consisting of a series connection of the controlled phase shifter 18 (36), a directional coupler 19 (37), the phase shifter 23 (32) of the phase detector 27 (30), integrator 26 (29). The comparison by the phase compensating signal of the n tap 28 (tenth 31) is produced in the phase detector 27 (30). When the clock skew compensation and compensated signal at the output of integrator 26 (29) there is a voltage whose level is proportional to the phase difference. Under the influence of the voltage controlled phase shifter 18 (36) adjusts the phase of the compensating signal.

To compensate for the phase delay in passing the compensating signal to the fourth directional coupler 22 (ninth 40) and rotate 90entered the phase shifter 23 (32). The rotation phase 90due to the fact that the signals at the inputs of the adder 12 and the fourth directional coupler 22 (40) must be in opposite phase, and at the inputs of phase detector 27 (30) shifted 90.

The measurement of the difference of the amplitudes of the compensation and compensated (interference) signals produced by the ring of automatic level: synchronous detector 25 (34), the integrator 24 (33) controlled attenuator 20 (38), the third directional coupler 21 (eighth 39). Comparison of the amplitude of the compensating signal and the compensated occurs in the block synchronous detector 25 (34).

From the output of the first amplitude modulator 3 signal through the first directional coupler 17 and through circulate udaetsya in space, and the output signal of the second amplitude modulator 4 via a directional coupler 35 and the circulator 11 is supplied to the irradiator (pathogen) 10 of the first antenna A1 with vertical (horizontal) polarization and radiated into space.

On the other side of two-way radio communication signal from the second antenna A2 with irradiators (pathogens) 9 and 7 with horizontal and vertical polarization and through the circulator 11Iand 8Idirected the taps 31Ithe 40Iand the 28I, 22Iarrives at the inputs of adder 12Iand subtractive block 13Iand so on.

Similarly operates the wireless link due to the transfer from the other end.

Thus, the proposed wireless link connection with the reuse of frequencies in contrast to the prototype allows you to work bidirectionally transmit and receive. It uses the same blocks as in the prototype. The most expensive units are antenna-feeder devices, such as transmission and reception. They are the same for the prototype and the proposed radio communication. However, in the proposed device uses only two antennas for reception and for transmission. In the prototype it is necessary to use four antennas that Swazi with reuse frequency, containing the first transceiver, which contains connected in series signal generator key messages and the power splitter, the first and second outputs of which are connected with the first inputs of the first and second amplitude modulators, respectively, the antiphase input of the amplifier is the input signal additional messages, and its first and second outputs connected to the second inputs of the first and second amplitude modulators, respectively, and the adder and subtractive unit, and first and second inputs of the adder and subtractive blocks are connected, respectively, in addition, amplitude limiter, the first synchronous and phase detectors, the demodulator key messages, the first phase shifter and the first and second antenna exciter and exciter each, characterized in that the input of the second transceiver, identical to the first, in each of which is connected in series introduced the first directional coupler and the first circulator, the first output of which is connected to the first exciter antenna and the second output circulator - with the input of the fifth directional coupler and connected in series to the first controlled phase shifter, the second is directed is on the fourth directional coupler is connected with the third output of the fifth directional coupler, the first output of which is connected in series through the second synchronous detector and the first integrator is connected to a second input of the first controlled attenuator, the second output of the third directional coupler connected to the second input of the second synchronous detector, in addition, the second output of the fifth directional coupler connected in series through the first phase detector and the second integrator is connected to a second input of the first controlled phase shifter, the first input of which is connected to the second output of the first directional coupler and the second output of the second directional coupler through the first phase shifter is connected to a second input of the first phase detector, the input of the first directional coupler connected to the output of the first amplitude modulator, the outlet of the fourth directional coupler connected to the first input of the adder, in addition, connected in series to the sixth directional coupler, the second controlled phase shifter, the seventh directional coupler, the second controlled attenuator, the eighth and ninth directional couplers, the output of the latter is connected with the second input of the adder, the second output of the eighth directional otvetitl the m second controlled attenuator, the second output of the seventh directional coupler through a second phase shifter connected to the second input of the second phase detector, the first tenth of a directional coupler connected to a second input of the third synchronous detector, the second output of the tenth directional coupler connected in series through the second phase detector and the fourth integrator connected to the second input of the second controlled phase shifter, while the third exit tenth of a directional coupler connected to a second input of the ninth directional coupler, the input tenth of a directional coupler is connected with the second output of the second circulator, the first output of which is connected to the second exciter antenna, the output of the sixth directional coupler connected to the second input of the second circulator, in addition, the output of the adder through the amplitude limiter connected to the inputs of the demodulator of the main messages and the first synchronous detector, the output of the second amplitude modulator connected to the input of the sixth directional coupler, the output of the subtractive unit is connected to a second input of the first synchronous detector whose output is the output signals of the additional message

 

Same patents:

The invention relates to telecommunication and can be used in wired, radio, microwave and satellite communication systems

The invention relates to communication technology, and in particular to a communication system in which a user transmits data variable speed

The invention relates to the field of electric and radio communication and can be used in wired, radio, radio-relay and meteoric lines

The invention relates to method and apparatus for data transmission in a system with multiple carrier frequencies

The invention relates to communication systems, spread spectrum, providing the opportunity for multiple transmitters to share a single channel multiplex transmission code division (MPCR) or channel multiple access code division (mdcr) by using these channels orthogonal transmitted signals

The invention relates to electro - and radio and can be used in wired, radio, microwave and satellite communication

The invention relates to radio communications and can be used in space and terrestrial radio links with reuse frequency

The invention relates to communication technology and can be used in synchronous or asynchronous address communication systems for sealing signals

The invention relates to electro - and radio and can be used for sealing wire, radio, microwave, optical and space lines of communication

The invention relates to techniques for radio

Line radio // 2219660

The invention relates to radio engineering, in particular to the transmission of discrete messages, and can be used to improve the efficiency of bandwidth usage lines and radio communications networks, in particular lines and communication networks in systems of automatic dependent observations when used on data lines of a complex of technical means of data transfer

The invention relates to radio communications and can be used in space and terrestrial radio links with reuse frequency

Line radio // 2160503
The invention relates to radio communications and can be used in space and terrestrial communication systems using spatial modulation

The invention relates to the field of frequency synthesis and can be used in the frequency synthesizer with a fractional value of the division factor

FIELD: communications engineering.

SUBSTANCE: proposed system has user terminal, gateway, and plurality of beam sources radiating plurality of beams, communication line between user terminal and gateway being set for one or more beams. Proposed method is based on protocol of message exchange between gateway and user. Depending on messages sent from user to gateway, preferably on pre-chosen periodic basis, gateway determines most suited beam or beams to be transferred to user. Messages sent from user to gateway incorporate values which are, essentially, beam intensities measured at user's. Gateway uses beam intensities measured at user's to choose those of them suited to given user. Beams to be used are those capable of reducing rate of call failure and ensuring desired separation level of beam sources.

EFFECT: reduced rate of call failure in multibeam communication system.

20 cl, 27 dwg

Up!