Title :
Design methods for irregular repeat accumulate codes
Author :
Roumy, A. ; Guemghar, S. ; Caire, G. ; Verdú, S.
Author_Institution :
IRISA-INRIA, Rennes, France
fDate :
29 June-4 July 2003
Abstract :
We optimize the low-complexity random-like ensemble of irregular repeat accumulate (IRA) codes for binary-input symmetric channels in the large blocklength limit. IRA codes Jin, H et al. (2000) are special subclasses of both irregular LDPCs and irregular turbo codes. We present numerical results for the BIAWGNC and formulate the density evolution (DE) Richardson, TJ et al. (2001) for IRA codes. We study the stability condition of the fixed-point corresponding to zero BER.
Keywords :
optimisation; parity check codes; turbo codes; BIAWGNC; binary-input symmetric channels; density evolution; irregular LDPCs; irregular repeat accumulate codes; irregular turbo codes; optimisation; stability condition; zero BER; Bit error rate; Constraint optimization; Design methodology; Design optimization; Information analysis; Mutual information; Noise level; Optimization methods; Stability; Turbo codes;
Conference_Titel :
Information Theory, 2003. Proceedings. IEEE International Symposium on
Print_ISBN :
0-7803-7728-1
DOI :
10.1109/ISIT.2003.1228016
