CONVOLUTIONAL CODING AND VITERBI DECODING SYSTEM TRANSPARENT TO amp;#152; AND amp;#152;/2 PHASE JUMPS, APPLICABLE TO TDMA TRANSMISSIONS PARTICULARLY

摘要

coding system and decoding convolutionnelviterbi transparent to phase jumps of ~ and ~ /. 2.in particular for tdma communicationsthe transmitter (3) of the invention includes:a du00e9multiplexeur (10) receiving a digital train(tnt) and operating at a rate a bit.a differential encoder (13). (4) receiving the typetrains du00e9multiplexu00e9s (11, 12) and providing twocoded trains (14, 15).two coders convolutifs (16, 17) each of which providesa code word (co, c1 - o (1).two multiplexers (18, 19), each receiving a passworda single convolutif code encoder (18, 19)providing a component (pt, qt) is a symbol.to transmit.the receiver (4) has two components (rp, rq)the symbol received (ct) which are applied to two demultiplexers(22, 23) to provide a code word (ro, r1, r).(1). each bit of a code word is applied to a decoderin viterbi (24, 25). a decoder (28).type 4 provides two trains decoded cdm (29, 30) which arethen multiplexed (31).figures published fig.3a and fig.3b.