Title :
A new block-coded modulation scheme for Rayleigh fading channel, soft output decoding issues
Author :
Yousefi, Shahram ; Hons, E.S. ; Khandani, Amir K. ; Frey, Brendan J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
We investigate the application of the sum-product algorithm to the decoding of a q-ary block-coded modulation (BCM) scheme which is based on extending the parity check equations of a binary block code to q-ary symbols. This is achieved by decomposing the code into a sub-code with an acyclic Tanner graph and its cosets which are represented by a trellis diagram. The combination of these two cycle-free graphs are used to develop an efficient soft output decoding algorithm for the given code
Keywords :
Rayleigh channels; binary codes; block codes; decoding; graph theory; modulation coding; Rayleigh fading channel; acyclic Tanner graph; binary block code; bit error probability minimization; code decomposition; cycle-free graphs; discrete optimization method; parity check equations; q-PSK constellation; q-ary block-coded modulation; q-ary symbols; soft output decoding algorithm; sub-code; sum-product algorithm; trellis diagram; Block codes; Decoding; Equations; Fading; Labeling; Linear code; Modulation coding; Parity check codes; Probability; Sum product algorithm;
Conference_Titel :
Information Theory, 2000. Proceedings. IEEE International Symposium on
Conference_Location :
Sorrento
Print_ISBN :
0-7803-5857-0
DOI :
10.1109/ISIT.2000.866547
