SU1453608A1 - Multichannel noncoherent information transceiving system - Google Patents

Description

UNION OF ADVISORS

SOCIALIST

RESLUBLIN

,, SU _t , 1453608 A1 (51) 4 H 04 JII / 00 -__________________

STATE NOMINATION FOR INVENTIONS AND NORTHS UNDER GNST OF THE USSR

DESCRIPTION OF THE INVENTION

TO AUTHOR'S CERTIFICATE

HWB — MnrtBWgWHIDMDMI — IDN — having appeared .mt ».” ΙΤ · || (21) 4166576 / 24-09 (22) 12.24.86 (46) 01/23/89. Bull. No. 3 (71) Voronezh Polytechnic Institute (72) V, I. Ledovsky (53) 621.395.44 (088.8) (56) USSR Copyright Certificate No. 1210229, cl. H 04 J 11/00, 1985.

(54) MULTICHANNEL INCORRECT INFORMATION TRANSMISSION AND RECEIVING SYSTEM (57) The invention relates to radio engineering and communications. The purpose of the invention is to increase throughput. The system contains on the transmitting side: switches 1, gr 2 of orthogonal codes, majority block 3, phase modulator 4, gr 5 carrier, synchronization block 6, transmitter 7, inverters 8 and keys 9, and on the receiving side: a receiver 10, a synchronization unit 11, phase detectors 12 and optimal processing units (B00) 13, each of which consists of matched filters 14 and 15, an adder 16, envelope detectors 17 and 18, a comparison unit 19 and a message generator 20. The goal is achieved by highlighting additional information in the system. For this, in each of B00 13, the output signals of the matched filters 14 and 15 are added to the adder 16 and the resulting signals from the 2nd to the kth B00 13 are compared in phase with the output signal of the 1st B00 13, If the phases of the signals differ by greater than 90 °, then at the moment of the action of the trailing edge of the clock pulse of the synchronization unit 11, the symbol 1 is formed at the output of the phase detector 12, otherwise 'O' ¹ , 1 ill.

The invention relates to the field of radio engineering and communication and can be used in wired., Radio, radio relay and space communication lines,

The aim of the invention is to increase throughput,

The drawing shows a structural circuit diagram of a multi-channel incoherent transmission system and ed reception and informa hell and and

The system comprises on the transmitting side to the switch 1, a generator 2 of orthogonal codes, a majority unit 3, a phase modulator 4, 5 ed generator carrier frequency synchronization unit 6 _z tion, the transmitter 7. (K-I) inverters Z (K-1) keys 9, and on the receiving side contains a receiver 10 „synchronization unit 11, (K — 1) phage detectors ₂ θ! 2, and K blocks of optimal processing 13, each of which contains the first and second matched: filters 14 and 15; the adder 16, the first and second envelope detectors 17 and 18, the comparison unit 25 19 and the shaper 20 messages

A large number of information transfer and reception systems operate as follows, 30,

On the transmitting side, K synchronous binary channel signals arrive at the control inputs of switches 1, and 2K orthogonal code sequences are formed in the generator 2 with a duration equal to the duration of the channel information symbols. Depending on the signal level at the control input of each switch 1, one of a pair of code sequences acting on its inputs is transmitted to its output. In each of the keys 9, depending on the level, the information signal of the additional (synchronous with the main :; channel, one of the sequences is selected - the sequence itself or its inversion, acting respectively at the output of switch 1 and inverter 8, the output signals of all keys 9 are added together majority output sequence of the first switch 1 in the majority block 3 and are used to manipulate the oscillation phase of the generator 5 e / 55 phase modulator 4, which then through the transmitter 7 per go through the communication line, Block 6, to which the first input is entered information about the moments of the end of the code sequences, and the second - the carrier frequency, generates clock signals that are input into the group signal in the transmitter 7, Ma to the receiving side from the output of the receiver 19 the group signal on K blocks! 3, in each of which the first and second matched filters 14 and 15 are matched with the corresponding signals of a certain pair of code sequences formed on the transmission. The output signals of the first and second matched filters 14 and 15 after detection in the first and second detectors 17 and 18 are compared with each other in magnitude in block 19 and the largest of them with a certain sign (for the first detector 17 is positive, for the second detector 18 is negative) are fed to input shaper 20 messages. In the shaper 20 at the moments of the action of the clock pulses corresponding in time to the ends of the code sequences at the outputs of the first and second matched filters 14 and 15 generated by block 11, messages of the main channels are generated. Additional information is extracted in the system as follows: In each of the blocks 13, the output signals of the first and second matched filters 14 and 15 are added to the adder 16 and the total signals from the second to the Kth block 13 are compared in phase with the output signal of the first block 13. If the phases of the signals differ by an amount greater than 90 °, then at the moment of the trailing edge of the clock pulse of the block 11, the symbol 1 is formed at the output of the phase detector 12, otherwise, О,

Claims (1)

Claim A multi-channel incoherent system for transmitting and receiving information, containing on the transmitting side K switches (Kb 3), the first and second inputs of which are connected to the corresponding 2K outputs of the orthogonal code generator, a majority block, the first input of which is connected to the output of the first switch, serially connected carrier frequency generator and a phase modulator, the second input of which is connected to the output of the majority block, and a transmitter, the first 3 input of which is connected to the output of the synchronization block, the first and second inputs to torogo respectively connected to the outputs of orthogonal code generator and a generator carrier, and on the receiving side comprising a series-connected receiver and block synchronization, and K optimal processing blocks, each of ·; which contains the first and second matched filters, the outputs of which through the corresponding first and second envelope detectors are connected to the first and second inputs of the comparison unit 1, the output of which is connected to the input of the message former, the synchronizing input of which is the synchronizing input of the optimal processing unit, information input 2 which are the combined first and second inputs of the matched filters, and the second output of the receiver is connected to the combined information inputs of all K optima blocks 2-nd processing, the combined synchronizing inputs of which are connected to the output of the synchronization unit, characterized in that, in order to increase the throughput, (K-Ι) inverters and (K-Ι) keys, each of which is turned on, are introduced between the output of the corresponding from the second to Kth switch and the corresponding from the second to Kth input of the majority block, and each of the (Κ-l) inverters is connected between the first and second inputs of a single name key, and the output of the phase modulator is connected to the second input of the transmitter , and on On the receiving side, (Κ-l) phase detectors are introduced and an adder is inserted into each of the K blocks of optimal 5 processing, the first and second inputs of which are connected to the outputs of the first and second matched filters, and the adder output is the output of the optimal processing block, the first inputs all phase detectors are combined and connected to the output of the first block of optimal processing, and the outputs of the remaining from the second to the Kth block of optimal processing are connected to the second inputs of the corresponding (Κ-l) phase detectors, synchronizing inputs which are combined and connected to the input of the synchronization unit.