Title :
A new labeling search method for bit-interleaved coded modulation with iterative decoding
Author :
Cheng, Qi ; Xu, Xibin ; Zhou, Shidong ; Xiao, Limin
Author_Institution :
State Key Lab on Microwave & Digital Commun., Tsinghua Univ., Beijing, China
fDate :
30 May-1 June 2005
Abstract :
The strategy for assigning binary indices to signal points is crucial to the performance of bit-interleaved coded modulation with iterative decoding (BICM-ID). We address the problem of finding the most suitable symbol mappings considering both the convergence behavior at low signal-to-noise ratios (SNR) and the bit error rate (BER) at high SNR. A new method based on the binary switching algorithm combined with the extrinsic information transfer chart (EXIT chart) is proposed, and we find some mappings exhibiting turbo cliff positions and bit error floors as desired.
Keywords :
AWGN channels; error statistics; iterative decoding; modulation coding; AWGN channels; BER; BICM; EXIT chart; SNR; binary indices; binary switching algorithm; bit error floors; bit error rate; bit-interleaved coded modulation; convergence behavior; extrinsic information transfer chart; iterative decoding; labeling search method; signal points; signal-to-noise ratio; turbo cliff positions; Bit error rate; Convergence; Interleaved codes; Iterative algorithms; Iterative decoding; Labeling; Modulation coding; Search methods; Signal mapping; Signal to noise ratio; BICM; EXIT; convergence behavior; iteraive decoding; symbol mapping;
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
Print_ISBN :
0-7803-8887-9
DOI :
10.1109/VETECS.2005.1543359
