Title :
Soft output Viterbi algorithm (SOVA) for non-binary turbo codes
Author :
Tan, Jun ; Stüber, Gordon L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
An optimal MAP-equivalent SOVA decoding algorithm and its simplified suboptimal algorithm for non-binary codes are proposed. The implementation of its suboptimal algorithm is simpler, while its performance is very close to the optimal Log-MAP algorithm. The proposed SOVA can be used as a decoder for turbo trellis coded modulation (TTCM). It is concluded that the proposed SOVA performs very close to the Log-MAP algorithm for both the TTCM and binary turbo codes, and its performance is better than the conventional SOVA
Keywords :
Viterbi decoding; iterative decoding; trellis coded modulation; turbo codes; Log-MAP algorithm; MAP-equivalent SOVA decoding algorithm; binary turbo codes; nonbinary turbo codes; optimal algorithm; soft output Viterbi algorithm; suboptimal algorithm; turbo trellis coded modulation; Convolutional codes; Decoding; Degradation; Modulation coding; Turbo codes; Viterbi algorithm;
Conference_Titel :
Information Theory, 2000. Proceedings. IEEE International Symposium on
Conference_Location :
Sorrento
Print_ISBN :
0-7803-5857-0
DOI :
10.1109/ISIT.2000.866781
