RussianPatents.com
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Microwave transmitter with optimal setting of output capacity. RU patent 2463704. |
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FIELD: radio engineering. SUBSTANCE: device comprises the following serially joined components: a waveguide of input microwave signal supply, a decoupling device, a p-i-n attenuator, a microwave amplifier and a load, and also a source of supply and a modulator, a decoder of frequency code, which comprises a matching device, a control device, a digital-to-analog converter (DAC) and a controlled source of current. EFFECT: invention provides for maximum output capacity of a microwave transmitter at bearing frequencies, reduced level of noise. 2 dwg
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Antenna device / 2462833 Device has a magnetic current antenna (401) which uses magnetic current as a radiation source; an electric current antenna (402) which uses electric current as a radiation source; a circuit (403) for controlling the electric current/magnetic current distribution proportion, which transmits signals to the magnetic current antenna (401) and the electric current antenna (402), where the magnetic current antenna (401) and the electric current antenna (402) are arranged such that the polarised wave emitted by the magnetic current antenna (401) and the polarised wave emitted by the electric current antenna (402) cross each other at right angles. The circuit (403) for controlling the electric current/magnetic current distribution proportion controls distribution of radio waves emitted by the magnetic current antenna (401) and radio waves emitted by the electric current antenna (402). |
Method and device to send upstream signal containing data and control information along upstream channel / 2462815 Invention discloses a method and a device to transmit the first and second upstream signals, besides, every of which comprises data and control information. The method includes channel coding of control information of the second upstream signal on the basis of a number of symbols of control information for generation. Channel coding includes definition of a number of symbols in compliance with the size of useful load of data of the first upstream signal and a full number of transmitted symbols of a physical upstream channel (PUSCH) of the first upstream signal. |
Broadcasting receiver / 2461965 In the course of channel searching performed for the first time after broadcasting receiver installation the switch is switched to each side of ATT 5 attenuator and side of amplifier Amp 7 to obtain the information on receiving status (AGC, BER, C/N). Broadcasting receiver is provided with counter 32a for counting the quantity of channels available for receiving at each of amplifier Amp 7 and ATT 5 attenuator. If image/voice can be normally received by corresponding channel, it is defined on the base of information on receiving status from detecting device 31 of information on receiving status. If it is determined that image/voice cannot be normally received, then the counter of attenuator side or amplifier side increments by one. After channel search is finished, two counters are compared and the switch is fixed at side that is available for normal receiving of more channels. |
Short - wave receiving center / 2461873 Device contains i analogue-digital converters the outputs of which are connected to the inputs of corresponding i delay units and Hilbert transformers, the outputs of which are connected to the corresponding inputs of switching device and corresponding inputs of related module former, the outputs of which are connected to the second inputs of related units of weight coefficients and to the corresponding inputs of maximum selection unit, the first output of which is connected to the control input of switching device, the second output of maximum selection unit is connected to the first inputs of weight coefficient units, the outputs of which are connected to the related inputs of the first summing unit, the output of which is connected to the second inputs of first and second multiplying units, the outputs of which are connected to the corresponding inputs of the second summing unit, the output of which is connected to the end device, moreover, the first and second outputs of switching device are connected to the first inputs of the first and second multiplying units correspondingly. |
Attenuation of in-phase signal for differential duplexer / 2461123 Duplexer provides for a differential received signal in the RX+ and RX- ports. The received differential signal includes an in-phase noise signal that may originate from the transmitted signal. The in-phase signal is attenuated by an in-phase filter within the circuit matching impedance related to the RX+ and RX- ports. The impedance matching circuit includes the first passive circuit put in between the RX+ port and the first unit, the second passive circuit put in between the RX- port and the second unit and an in-phase filter put in between the first and the second units. In one circuit the in-phase filter includes the includes the first inductance coil put in between the first unit and the common unit, the second inductance coil put in between the second unit and the common unit and a capacitor put in between the common unit and the ground bus. |
Using frequency band of non-geostationary satellites for geostationary satellite communication without mutual noise / 2460212 Geostationary satellite communication system comprises a ground station to send signals to a GSO satellite using a GSO frequency spectrum, besides, the ground station is additionally capable of functioning in such a manner so that it sends signals to the GSO satellite using an expanded frequency spectrum, besides, the expanded frequency band comprises a geostationary (GSO) frequency spectrum and a non-geostationary (NGSO) frequency spectrum; a control centre, which may instruct the ground station, so that it sends signals to the geostationary satellite using the geostationary frequency spectrum, when it is expected that the non-geostationary satellite is located at one line relative to the ground station and the geostationary satellite; and the control centre may additionally instruct the ground station so that it sends signals to the geostationary satellite using an expanded frequency spectrum, when it is expected that neither non-geostationary satellite is available on one line relative to the ground station and the geostationary satellite. |
Method of transmitting information and method of picking up signal / 2460102 Method of transmitting information and a method of picking up a useful signal involves generation of two waves in an emitter at the output of an optical transistor which operates based on the phenomenon of self-switching of power between two unidirectional distributed-coupled waves in a nonlinear optical element, wherein the power of said two waves varies in phase opposition, in accordance with the signal at the input of the optical transistor. That signal is picked up in the received radiation when waves pass through the propagation channel. To pick up the signal, three or four Stokes parameters or three or four coherence matrix elements for the carrier frequency of the radiation at the output of the optical transistor are measured. The useful signal is picked up by comparing the relationship between Stokes parameters or coherence matrix elements, measured after the waves pass through the propagation channel, with the same relationship between them, but calculated or measured at the output of optical transistor used. |
Virtual planning in heterogeneous networks / 2459357 As an example, access terminals in a communication environment may support connections with nearby network transmitting devices and report factors applicable for wireless planning to a central facility, such as a macrobase station. The macrobase station may use such factors to improve wireless communication for other service cells in or near a macrocoverage area served by the macrobase station. By storage of information applicable to dominant conditions of wireless communication, requirements on quality of service, messages of reports with pilot signals, issues of mobility management, etc., for transfers in a cell, considerable reduction of noise may be implemented for the macrocoverage area or nearby coverage areas. |
Control of noise using partial repeated usage of frequencies / 2459356 Noise generated during wireless communications may be controlled with the help of application of partial repeated usage and other methods. In some aspects partial usage may refer to alternations of hybrid automatic requests for repeated transfer (HARQ-alternations), parts of a time interval, a frequency spectrum and expansion codes. Noise may be controlled by using a transfer capacity profile and/or a weakening profile. Noise may also be controlled by using methods related to capacity control. |
Method to assess bearing frequency shift in up-link for wireless telecommunications systems / 2459354 After detection of the first OFDM symbol and detection of delay time, mutual correlation function is calculated with a reference sequence, then the second, third and fourth serial OFDM symbols are received, the first and second symbols contain the code X, the third and fourth symbols contain the code X+1. The mutual correlation function is calculated for each of them. Maxima of mutual correlation functions of all OFDM symbols are identified within the main peak, and the maximum of the mutual correlation function of the first OFDM symbol is summed with the complex conjugate maximum of the mutual correlation function of the second OFDM symbol. Similarly maxima of mutual correlation functions of the second and third OFDM symbols are summed, as well as of the third and fourth OFDM symbols. Difference of phases is calculated between the first and second, second and third, and between third and fourth OFDM symbols by division of an imaginary part of the sum of mutual correlation function of the first OFDM symbol with the complex conjugate maximum of the mutual correlation function of the second OFDM symbol into the valid part of this sum. The difference of phases is averaged between the first and second, second and third, third and fourth OFDM symbols. The produced averaged value is divided into 2π and duration of the OFDM symbol. |
Methods and devices to control amplification during initial capture in communication system / 2454016 Invention relates to communication systems. The methods and apparatus for controlling amplification during the initial capture in a communication system and method for use in a wireless communication system are disclosed. The technology disclosed comprises measurement of power of the signal received by the transceiver repeatedly over a given period of time, and the signal includes a certain number of symbols. Strengthening of the transceiver can be reduced only if the current measured power is greater than previously measured power within a specified period of time, as long as the maximum power level is not measured. Through the reduction of re-amplification, adapting the maximum capacity, equal to the power level of the pilot symbol of capture, overcorrection and distortion through the transceiver is excluded during the initial timing and frequency locking. |
Method of linearising amplitude characteristics of radio signal amplification path / 2425439 Method of linearising amplitude characteristics of the amplification path of a radio signal formed by amplification characteristics of two parallel amplifiers, characterised by that the nominal value of the transmission coefficient of the amplification path is formed as a transfer function of two amplifiers which are connected in parallel on inputs and outputs and separately controlled on two sections of the amplitude characteristic. At the initial low-signal section of the amplitude characteristic, the common modulo transmission coefficient is formed as a sum of transmission coefficients of the non-controlled main amplifier and an auxiliary controlled parallel amplifier, and on the remaining section up to the maximum input level by adjusting the transmission coefficient of the main amplifier for the transmission coefficient of the auxiliary parallel amplifier equal to zero during the off mode on the current of output transistors thereof, and compensation for phase deviations is performed on the an input signal which is common for both amplifiers. The method is based on that, the transfer function of the two parallel-connected directed links (amplifiers) is equal to the sum of transfer functions of the directed links. Directivity is absence of cross-talk between the links and absence of effect of the overall output signal on characteristics of the parallel-connected links. In the disclosed method, directivity is provided by limiting the active region of the operation mode of the auxiliary amplifier on gain and on operation mode, on the direct current of the final stage of the auxiliary amplifier. |
Amplification controller for receiver in communication system with multiple carriers / 2389131 Receiver in communication system OFDM includes power detector and amplification controller. Power detector determines total power of received signal of OFDM, for instance by calculation of ADC data samples power and power averaging. Amplification controller controls amplification of receiver by discrete steps of amplification and in one direction, for instance from mode of lowest amplification to mode of highest amplification on the basis of determined total power of received signal. Amplification controller puts receiver in mode of lowest amplification. Then amplification controller detects condition of low total power of received signal, for instance by comparison of determined total power of received signal to specified threshold value that actually represents absence of signal. Amplification controller changes receiver to mode of higher amplification, if condition of low total power of received signal was detected, otherwise it preserves current mode of amplification. |
Method for automatic control of peak values of electrical broadcast signals on given level with stabilisation of relative mean power and device for realising said method / 2383101 Invention relates to communication engineering and can be used when recording and playing back monophonic sound broadcast signals, as well as during transmission over communication lines. A method and a device for realising said method are proposed, which provide non-inertia limiting and companding sound broadcast signals without enrichment of their spectrum with considerable increase in relative mean power and are characterised by high control efficiency in channels with unstable transmission coefficient, reduced distortions when varying control parametres of signals with rapid change of level, as well as subjective perceptible quality of signal due to reduced masking of its high-frequency components. This is ensured by using inertial automatic control of level and delay of input and output signals respectively by approximately 160 and 10 mcs. |
Method and device for loudness level regulation / 2365030 Method and device for regulation of loudness level are offered. The device 1 of loudness level regulation contains a definition module 20, a memory module, the first counting module 24 and the second counting module 26. The first counting module 24 contains a comparator 240 and a multiplier 241. The definition module 20 receives an input acoustical signal where the input acoustical signal is connected with set of input sound sources and corresponds to one of the specified input sound sources, besides; the definition module mounts change of a corresponding input sound source of an input acoustical signal. The memory module keeps set of input sound records. The first counting module calculates an input acoustical signal according to an input acoustical signal and input sound records. |
Automatic signal gain control method / 2345477 Invention refers to signal gain control devices in telecommunication equipment and specifically to VoIP voice gain control methods. Method contains the stages as followings: incomer measurements, simultaneous calculation of two, the first and second current gains based on measuring result, calculation of total gain by multiplication of the first and second current gains, and output gain control based on calculated total gain. |
Method and device for increasing interference resistance of a receiver / 2305363 In accordance to the invention, in the method and in the device, power level of received signal is determined. If the power level equals or exceeds a predetermined threshold value, then amplifier 703 with low inherent noises is bridged 730. In alternative realizations, detector is used for high level of radio frequency power 105 for controlling amplification coefficient of input cascade 110 as a function of interference power. Continuous control over amplification coefficient makes it possible to suppress interference and to synchronize sensitivity of the receiver at lower signal levels, compared to the case of block with radio frequency amplification coefficient commutation block 730. Method of the invention allows synchronization of amplification coefficient at input with a predetermined value 1601. during operation of the receiver, change of control coefficient power of intermediate frequency signal 1605 is measured. If aforementioned change is less than the predetermined value 1610, then level of interference and signal is below the minimal noise level and, therefore, amplification coefficient is increased 1615. If the change of power of intermediate frequency signal exceeds a predetermined value, then presence of distortions is obvious and amplification coefficient is decreased to decrease the level of inter-modulation components 1620. Aforementioned process is used to produce best trade-off between interferences and noise factor during operation of the receiver. |
Pulse-code signal selector incorporating automatic digital gain control / 2292639 Proposed pulse-code signal detector incorporating automatic digital gain control has channels, each one incorporating main amplifier connected in series with main threshold element, decoder connected in series with pulse shaper, and first switch whose data input is connected to decoder input and control input, to pulse shaper output; next-channel main amplifier gain is higher by an order of magnitude than that of preceding one; all channels are connected in parallel and newly introduced in each one are preamplifier whose gain is higher by an order of magnitude than that of next one and threshold element; input of entire selector functions as common input of all preamplifiers; preamplifier output is connected to data input of main amplifier and to input of additional threshold element; output of additional threshold element is connected to control input of main amplifier; each channel has phase protection unit; output of main threshold element is connected to input of phase protection unit whose output is connected to decoder input and to data input of first switch; outputs of first switches in each channel function as selector outputs. |
Method for automatic adjustment of radio-electronic device and automatic adjuster / 2292126 Concept, upon which automatic adjustment method is based, assumes that user after manually adjusting a radio-electronic device records adjustments under name, appropriate for signal, in which adjustments took place, and on repeated receipt of this signal it is recognized and adjustment are read from memory automatically. For realization of idea automatic adjuster contains controlled block, signal recognition block, memory block and control code generator. |
Format distortion feedback (fdfb) / 2289880 Amplifier format distortion feedback (FB) consists of conversion deviation signal forming chain implemented using resistors (2,3) inserted between output and input of inverting amplifier (4), which has conversion slope control input (5). Received conversion deviation signal is multiplied by multiplier (1), whose signal adaptively defines amplifier (4) transfer characteristic slope. Such FB is adaptive non-linear, that is format distortion feedback (FDFB). |
Circuits of transmitter for communication systems / 2258309 One of methods is method for providing linear adjustment of level of output power of transmitter, containing device with multiple discontinuous setting values of amplification coefficient, and device with smooth adjustment of setting value of amplification coefficient, including steps for determining amplitude transfer function of transmitter for each said set of discontinuous setting values, forming of compensation table for amplification coefficient, receiving said setting values, reading compensated setting value of amplification coefficient from compensation table, adjustment of amplification coefficient. |
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