Title :
On punctured trellis coded modulation
Author :
Kim, Jaehyeong ; Pottie, Gregory J.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
Punctured convolutional codes result in some savings in the complexity of Viterbi decoders, compared to other codes of the same rate. However, in general use of the punctured structure in the decoder results in a performance loss for trellis codes, due to difficulties in assigning metrics. The authors provide constructions for punctured rate-2/3 codes based on decomposition of the metric into orthogonal components. These show no loss in performance for trellis coded QAM and PSK
Keywords :
Viterbi decoding; computational complexity; convolutional codes; frequency shift keying; quadrature amplitude modulation; trellis coded modulation; Viterbi decoders; complexity; decomposition; metrics; orthogonal components; performance loss; punctured rate-2/3 codes; punctured structure; punctured trellis coded modulation; trellis coded PSK; trellis coded QAM; Constellation diagram; Convolution; Convolutional codes; Decoding; Modulation coding; Performance loss; Phase shift keying; Quadrature amplitude modulation; Redundancy; Viterbi algorithm;
Conference_Titel :
Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2486-2
DOI :
10.1109/ICC.1995.524190
