DIGITAL INFORMATION RECEIVING AND TRANSMITTING DEVICE Russian patent published in 1994 - IPC

FIELD: electric communications. SUBSTANCE: device is provided on sending end with pulse distributor 13, registers 14₁-14_K forming parallel group, switching unit 15, AND gate 16, frequency divider 17, OR gate 18, pulse distributor 19; and on receiving end it has AND gates 32-34, write-read unit 35, register 36, accumulator 37, switching unit 38, and pulse shaper 39; unit 23 for shaping groups of pseudorandom trains is provided with flip-flop, code converter, and AND gates forming parallel group; sending-end switching unit 15 has K groups of parallel AND gates and one group of parallel OR gates; receiving-end switching unit 38 has two groups of parallel AND gates and one group of parallel OR gates; pseudorandom train separator 20 has three pulse shapers, four AND gates, two OR gates, two flip-flops, two pulse generators, three pulse counters, and two registers; write-read unit 35 has three pulse shapers, four flip-flops, three AND gates, two 2-2AND-OR gates, two NAND gates, and two inverters. Device provides for shaping code groups of equal-length pseudorandom train phase steps corresponding to definite original state of shift register generating pseudorandom trains followed by correcting errors of definite ratio brought in during transmission of mentioned code groups of pseudorandom train and also merging of several groups of pseudorandom train phase steps into one marker signal. EFFECT: improved noise immunity of device due to correction of errors in code groups of pseudorandom train. 4 cl, 7 dwg