Title :
A simple convergence comparison of Gallager codes under two message-passing schedules
Author :
Tong, Sheng ; Wang, Xinmei
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´´an, China
fDate :
3/1/2005 12:00:00 AM
Abstract :
The convergence rate of iterative decoding of Gallager codes on the additive white Gaussian noise (AWGN) channel using the sum-product algorithm (SPA) under the flooding schedule (FS) is compared with that under the turbo-decoding schedule (TDS). Analyses using extrinsic information transfer (EXIT) charts show that TDS exhibits a much faster convergence behavior than FS.
Keywords :
AWGN channels; convergence; error correction codes; iterative decoding; parity check codes; turbo codes; AWGN; EXIT charts; FS; Gallager codes; SPA; TDS; additive white Gaussian noise channel; convergence comparison; convergence rate; extrinsic information transfer charts; flooding schedule; iterative decoding; message-passing schedules; regular LDPC codes; sum-product algorithm; turbo-decoding schedule; AWGN channels; Additive white noise; Convergence; Delay; Floods; Information analysis; Iterative decoding; Parity check codes; Scheduling algorithm; Sum product algorithm;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2005.03012
