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

fYear

2000

fDate

2000

Firstpage

249

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 2000. Proceedings. IEEE International Symposium on

Conference_Location

Sorrento

Print_ISBN

0-7803-5857-0

Type

conf

DOI

10.1109/ISIT.2000.866547

Filename

866547