Title :
Parallel concatenated trellis coded modulation
Author :
Benedetto, S. ; Divsalar, D. ; Montorsi, G. ; Pollara, E.
Author_Institution :
Dipartimento di Elettronica, Politecnico di Torino, Italy
Abstract :
In this paper, we propose a new solution to parallel concatenation of trellis codes with multilevel amplitude/phase modulations and a suitable bit by bit iterative decoding structure. Examples are given for throughput 2 and 4 bits/sec/Hz with 8 PSK, 16 QAM, and 64 QAM modulations. For parallel concatenated trellis codes in the examples, rate 2/3 and 4/5, 8, and 16-state binary convolutional codes with Ungerboeck mapping by set partitioning (natural mapping), a reordered mapping, and Gray code mapping are used. The performance of these codes is within 1 dB from the Shannon limit at a bit error probability of 10 -7 for a given throughput, which outperforms the performance of all codes reported in the past for the same throughput
Keywords :
Gray codes; convolutional codes; decoding; phase shift keying; quadrature amplitude modulation; trellis coded modulation; 16 QAM; 64 QAM; 8 PSK; Gray code mapping; Shannon limit; TCM; Ungerboeck mapping; binary convolutional codes; bit error probability; iterative decoding structure; multilevel amplitude/phase modulations; parallel concatenation; reordered mapping; set partitioning; throughput; trellis coded modulation; trellis codes; turbo codes; Concatenated codes; Convolutional codes; Error probability; Iterative decoding; Modulation coding; Phase modulation; Phase shift keying; Quadrature amplitude modulation; Reflective binary codes; Throughput;
Conference_Titel :
Communications, 1996. ICC '96, Conference Record, Converging Technologies for Tomorrow's Applications. 1996 IEEE International Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-3250-4
DOI :
10.1109/ICC.1996.541356
