Bit-reliability mapping in LDPC-coded modulation systems

被引：61
作者：
Li, Y [1 ]
Ryan, WE [1 ]
机构：
[1] Univ Arizona, Dept Elect & Comp Engn, Tucson, AZ 85721 USA
来源：
IEEE COMMUNICATIONS LETTERS | 2005年 / 9卷 / 01期
关键词：
LDPC code; coded-thodulation; BICM; EXIT chart;
D O I：
10.1109/LCOMM.200501010
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this paper, we propose a reliability-based mapping. strategy in LDPC-coded modulation systems. Compared to conventional mapping methods, this strategy gives a 0.15 dB - 0.2 dB performance improvement with no added complexity. Extrinsic information transfer (EXIT) chart analyses are used to explain the reason for this improvement. LDPC-coded modulation systems with Gray and natural labeling are studied. We show that the performances of Gray-labeled systems are always superior.
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页码：1 / 3
页数：3
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