SU1732480A1 - Adaptive tropospheric radio station - Google Patents

Abstract

The invention can be used to transmit information in tropospheric lines and communication systems. In order to improve noise immunity, a coder 4 of a serial-parallel m-ary code, N-1 radio signal conditioners, a decoder of a serial-parallel m-ary code, N signal demodulators, N-1 channel frequency converters are introduced. In addition, in the transmitting part, each radio signal generator contains a manipulator and a radio pulse wave former, and in the receiving section, each channel frequency converter contains a high-frequency receiving unit, frequency converters, a specific addition unit, a synthesizer, and an optimal frequency selection unit. 2 zlf-ly, 1 ill.

Description

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The invention relates to radio communications and can be used to transmit information in tropospheric lines and communication systems.

The purpose of the invention is to improve noise immunity.

The drawing shows a structural scheme of an adaptive tropospheric radio station.

The radio station contains input 1 of digital information, block 2 time multiplexing, coder 3 commands, coder 4 t-ary serial-parallel code, shapers 5 radio signals, n-number of code combination symbols transmitted sequentially in time (m 2), N - number of shapers 5 radio signals having outputs 6 to the antenna system, software control and synchronization unit 7, frequency converters 8, frequency converter inputs 9 from the antenna system, coherent combining unit 10, frequency converters 11, high-frequency pr a nominal block 12, an optimal frequency selection block 13, a synthesizer 14, signal demodulators 15, a serial M-code decoder 16, a time division block 17, digital information output to the subscriber 18, a command decoder 19, a manipulator 20, drivers 21 radio waveforms, adder 22, transmitter 23, synthesizer 24, phase shifter 25 at 90 °, distributor 26 of the radio signal, demodulators 27.

Adaptive radio works as follows.

On the transmitting side, the information signals, time-compressed with the command signals in block 2 of the time multiplex, are sent to the encoder 4 of a parallel-serial m-ary code. From the output of the encoder 4, the signals arrive at the shaper 5 radio signals, then to the output

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dy in the antenna system 6-1-6-. Each of the radio signal formers 5 contains in-phase and quadrature keypads 20. Commands with the numbers of the selected optimal frequencies are transmitted via the reverse channel to the decoder 19 commands, from the output of which the control signals are sent to the frequency synthesizers 24. In addition, each of the N transmitters 23 operates at its optimum frequency.

The code combination at the output of encoder 4 consists of 2Nn elements, of which N parallel elements are spaced and frequency spaced, and n consecutive elements are spaced apart in time and frequency. The number of code elements is two times greater than Nn, since in the signal system under consideration the information is transmitted over the in-phase and quadrature channels. In block 7, control and timing signals are generated for transmitting information, command and sound signals.

In the receiving part, signals from the antenna system from the inputs 9 are sent to N converters; for each converter 8 from the antenna system, two copies of signals spaced apart in frequency and frequency are sent to the corresponding input 9. In each node, the signals are transmitted to the output high-frequency receiving unit 12 via frequency converters 11-1 and 11-2 to the coherent combining unit of signals 10 and from its output to unit 13 of the choice of optimal frequencies. Information about the numbers of the selected optimal frequencies is fed to the frequency synthesizer 14 and encoder 3. From the output of coherent combining blocks 10, information is sent to demodulators 27 and 28 through radio signal distributor 26. After demodulation in blocks 15, signals are sent to decoder 16 of serial-parallel m- of a personal code. After decoding, the signals of binary information and commands are separated in block 17 of time division, from the corresponding outputs of which they are sent to the subscriber and to the decoder of commands 19.

Claims (3)

1. An adaptive tropospheric radio station, containing in its transmitting part a temporary compression block, one input of which is connected to the output of a command encoder and the other is information, a radio signal shaping unit, and at the receiving part a channel frequency converter, the output of which is connected to a signal demodulator, a command decoder, a software control and synchronization unit, as well as a signal time decompression unit, one of the outputs of which is connected to the input of the command decoder, and the other output is the output of the radio station , from the fact that, in order to increase noise immunity, an encoder of a serially parallel m-th code and N-1 radio signal conditioning units is entered into the transmitting part, the output of the temporary compression unit being connected to the input 0 encoder of serial parallel m-th code, the outputs of which are connected to the inputs of the corresponding radio signal conditioners, the tuning input of each of which is connected to the corresponding output of the programming and synchronization unit, and the control input to the corresponding output of the decoder of the receiving part, and in the receiving part N-1 channel converters 0 frequencies, N-1 demodulators of radio signals and a decoder of a serially parallel m-th code, the output of which is connected to the input of the temporary decompressing block, each of the N1-1 channel 5 frequency converters are connected to the input of the corresponding signal demodulator, the outputs of all signal demodulators are connected to the decoder inputs of the m-ary series parallel code, the frequency tuning input of each signal demodulator is connected to the corresponding output of the programming and synchronization unit, the control output of each 5 channel frequency converter is connected to the corresponding input of the instruction encoder of the transmitting part. 2. Radio station pop.1, characterized in that the radio signal former 0 is made in the form of two channels, each of which consists of a series-connected manipulator and a wave former, the outputs of the wave former of both channels are connected to 5 corresponding inputs of the adder, the output of which is connected to the input of the transmitter, the output of which is the output of the radio signal shaper, as well as a synthesizer, one output of which is connected to 0 by the heterodyne input of the manipulator of the first channel, and the other output through the phase shifter with the heterodyne input of the manipulator of the second channel, the inputs of the manipulators of both channels are the inputs 5, the radio signal generator, and the control input and the synthesizer tuning input are the corresponding inputs of the radio signal generator. 3. The radio station according to claim 1, wherein the channel frequency converter is designed as a high-frequency receiving unit, the outputs of which are connected to the inputs of the corresponding frequency converters, the outputs of which are connected to the inputs of the coherent addition unit, the output of which is connected to the input of the optimum frequency selection unit and is the output of the channel frequency converter, the output of the optimum frequency selection unit is connected to the input of the synthesizer, the outputs of which are connected to the heterodyne inputs of the converter s frequency, the optimum frequency selection unit control output is appropriately vyhodom.kanalnogo frequency converter. 6-1 .3-2N-3 - V- / g9-2N-  3 9-2T