SU1007116A1 - Method of transmitting and receiving frequency signals - Google Patents

Abstract

A METHOD FOR TRANSMITTING AND ACCEPTING FREQUENCY SIGNALS, which consists in the fact that the original amplitude moduli. signals are filtered with high selectivity in the corresponding frequency ranges, then in each frequency range, signals with low selectivity are filtered, the filtered signals are delayed for different times, all signals received are summed and transmitted to the communication line, when received, signals are filtered with low selectivity, for the time corresponding to the delay time of transmission, and summarize the signals that are different. In order to increase the reliability of transmission and reception of information, during transmissions Do not generate correction signals in each frequency range by filtering with a lower selectivity of signals from adjacent frequency ranges; delay correction signals {by the difference in time delays of the corresponding frequency ranges; add and transmit with all signals; when receiving, correct the signals by filtering received signals. Q signals, delay them by the time corresponding to the delay time during their transmission, and summarize all received signals.

Description

110 The invention relates to communication technology and is intended for the simultaneous transmission of powerful, and the reception of weak broadband, signals with a limited time of their formation and processing. Methods are known for transmitting and receiving broadband signals based on their compression over time during reception, which results in an improvement in their performance. In accordance with these sposbbs, when transmitting signals, phase-generated phase-shifted and frequency-modulated voltages that are subjected to receive-coupled filtering 1 J are received. The disadvantage of these methods is a high level of residual voltage in the side time channels with a limited time forming and signal processing, which degrades the resolution of signals that differ many times in energy. The closest in technical essence. To the proposed is cn of the transmission and reception of frequency signals, which means that the original amplitude-modulated signals are filtered with high selectivity in the respective frequency ranges, then the signals with low selectivity are filtered in each frequency range, the filtered signals are delayed for different times , summarize all received signals and transmit them to the communication line; when received, the signals are filtered. with low selectivity, delayed by the time corresponding to the transmission delay, and summarize the 2 J signals. A disadvantage of this method is the presence of distortions in the spectrum of the transmitted signals, which reduces the reliability of the transmission and reception of signals. The aim of the invention is to increase the reliability of transmission and reception of signals. The goal is achieved by the fact that, according to the method of transmitting and receiving frequency signals, the initial amplitude-modulated signals filter with high selectivity in the corresponding frequency ranges, then in each frequency range they filter signals with low selectivity, delay the filtered signals by different time 62 summarize all received signals and transmit them to the communication line, when receiving signals are filtered with low selectivity, delayed by the time corresponding to the delay time during transmission and summarize the signals, during transmission they form a correction signal in each frequency range - by filtering with more low selectivity of signals of adjacent frequency ranges, delaying the correction signals by the difference in time delays of the respective frequency ranges, summarize and transmit with all signals, when receiving l dissolved corrective signa-. by filtering the received signals, delaying them by the time corresponding to the delay time during their transmission, and summarize all received signals. The drawing shows a block diagram of an apparatus for carrying out the method. The device contains sources of 1-3 voltages of transmitted signals, made on generators, filters C-6 with height O1 "hey selectivity, filters with low selectivity, coding delay lines 25-27, delay lines, phase inverters 46-51, adder 52, block 53 re-coding, communication line 5, primary decoding unit 55, pulse-voltage-prohibiting generator 5b, gating unit 57, 58-bo low-selectivity filters, decoding b1-63 delays, adder 6, delay lines 65-66, inverter 67 filter 68, blocks 69-70 st robbery, adder 71 Filters 72-7 with low selectivity, decoding delay lines 75-77, adder 78, delay line 79, gating unit 80, linear distortion correction filter 81. The outputs of the blocks with smaller numbers are connected to the inputs of the blocks of large numbers. Block 53 is COMPLETED according to a scheme consisting of blocks corresponding to blocks -52 and accordingly-connected. Block 55 is constructed according to a scheme consisting of filters, decoding delay lines and an adder, corresponding to blocks 72-78 and respectively connected. The TS.E, 11, 17, 19, 21, 23, 58 and 73 filters are tuned to frequency, filter-. Filters 5, 7, 12, 13, 15, 22, 24, 59, 31 7 - to the frequency and filters 6, 8, 10, 1Д, 16, 18, 20, 60, 72 - to the frequency of Phi have bandwidth Afo and highly selective, filters 72, 7 have df passbands and are selective. For their transmission ratios, respectively), the condition LDA 0 is satisfied. - | 7, For the delay times of lines, lines 63, 65, 66 0i, lines 61, 62, 66 lines 76, 77, 79 0, i (r page ecTp-Wp-T a LMO | ks ALIN) where T |, is the delay time of the voltages in the transmission and reception of signals corresponding to the ith signal; the duration of the gating pulse generator 56; T | 4 is the duration of the generator voltage pulses 2} A max is the maximum and minimum Tmlin delay time in the communication line 5. The delay times of the components of the transmitted voltages C and R and the applied voltages 0gp. ,, ... N with the spectrum in the 1st range after the nth additional filtering P ,, filter from the OUTLET voltage q. Of the filter corresponding to the ft. M filter of the received voltage, the corresponding lines, 76, 77, 79, determined from the ratios H 1 H, nl Hg ® fn-n-1 68 is characterized by the impulse response of DSTffgl1To (| the delay time of the pulses of the generator 3 from the pulses of the generator 2. The filter 81 corrects the phase shifts in the spec the voltage of the source being 64, entered into it by delay lines 7b, 77. The voltage source 1 is continuous in time, and sources 2 and 3 are pulsed. The pulses of sources 2 and 3 are not equally shifted in time relative to the generator pulses 56 and much less their duration.The power of the signal sources 2 and 3 is much higher than the signal power of the source. | 1. Filters -6 from the voltage source 2 selects the primary components and filters 7-2 from each primary select the secondary components of the corresponding mixture on "- right Nij. These components are multiplied by coding complex coefficients by delaying them in lines and inverting in phase inverters 46-51, then added to the voltage of source 3 in adder 52. In block 53, the voltage from the output of adder 52 is re-coded across the spectrum, as in blocks 4-52, multiplying by coding complex, amplitude and sign coefficients of the primary and secondary components of the corresponding code mixture of voltages, and these components are added to the voltage of source 1. From the output of block 53 via link 54 voltage is applied to the input of decoding unit 55, designed to restore the output voltage of the adder 52. From the output of block 57, the voltage is applied to decoding blocks 58-64 and from the output of block 71 to decoding blocks 72-78, designed to restore the voltage source 2. From the output of block 80, the voltage is applied to the input of the filter 81, designed to restore the voltage of source 1. From the output of the adder 64, the voltage is applied to the blocks 66, 67, 70, intended to form a voltage pulse corresponding to The part of the voltage at the output of block 57 in the time interval for the transmission of source pulses 3.Cpc bi | iyuschy 1 blocks 57 and 69 suppress the unused and delayed decoded pulses, corresponding to the signals of source 3, by gating by block 80, respectively, and suppressing 2. In the adder 71, the voltage is added, corresponding to 510071

gating distorted by the output voltage of the adder 52 and the pulses correcting this voltage from the output of the block 70.

Thus, the voltage at the output of the adder 64 contains the undecoded voltage of source 1, the decoded voltage of source 2, the residual voltage of source 3, and the voltage of the out-of-phase pulse generated by gating in block 57 of the non-decoded source of voltage 2, At the output of the adder 78, the voltage contains Hejaye-coded, decoded and residual voltage respectively of sources 1, 2 and 3. The voltage at the output of block 80 contains the undecoded source voltage 1 and the residual voltages Source 2 and 3-20

Technical implementation of devices; about the proposed method is possible

164

using digital technology elements as generators of narrow-band filter signals, blocks of temporal voltage shifts and pulse gating blocks, as well as elements of analog equipment for transferring the spectra of low-frequency components of transmitted signals to radio frequency communications at transmitters and back at receivers. The use of elements of digital technology allows the use of preformed normalized realizations of noise-like signals in transmitters and their parts for gating times in receivers. In this case, the total time of formation and recovery of each signal 1a is determined mainly by the duration of the impulse responses of low-selectivity filters of the receivers.

Claims (1)

METHOD FOR TRANSMISSION AND RECEIVING OF FREQUENCY SIGNALS, which consists in the fact that the original amplitude-modules. The filtered signals are filtered with high selectivity in the corresponding frequency ranges, then the signals with low selectivity are filtered in each frequency range, the filtered signals are delayed at different times, all the received signals are summarized and transmitted to the communication line, when received, the signals are filtered with low selectivity, delayed by time 'corresponding to the delay time during transmission, and summarize the signals, characterized in that, in order to increase the reliability of the transmission and reception of information when transmitting forms correcting signals in each frequency range by filtering with lower selectivity of signals of adjacent frequency ranges, delaying correcting signals by the difference in time delays of the corresponding frequency ranges, summing and transmitting with all signals, and when receiving receive correcting signals by filtering the received signals, delay them for a time corresponding to the delay time during their transmission, and summarize all received signals. SU „„ 1007116 I