Abstract:

The system of PDS(Pattern time Delay Shift) coding  communication can resist the multi\|path interfere well，but it can not resist noise in the channel well. Integrating TCM (Trellis\|Coded Modulation) code and PDS scheme can solve this problem by coding the source information with convolutional code and decoding the received sequence by soft\|decision Viterbi algorithm. Experimental results show that the proposed scheme gets about 3 dB coding gain, has better performance over the original decoding scheme.

Key words: pattern time delay shift coding, trellis\, coded modulation, differential decoding, soft-decision Viterbi decoding