Exact and approximated expressions of the log-likelihood ratio for 16-QAM signals

被引：0
|
作者：
Allpress, S [1 ]
Luschi, C [1 ]
Felix, S [1 ]
机构：
[1] Icera Inc, Bristol BS32 4AQ, Avon, England
来源：
CONFERENCE RECORD OF THE THIRTY-EIGHTH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS & COMPUTERS, VOLS 1 AND 2 | 2004年
关键词：
D O I：
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中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper discusses the exact and approximate calculation of the bit log-likelihood ratio (LLR) for a 16-QAM signal. In particular, we introduce a new modified max function, which allows for an effective implementation of the LLR formula. The results of the paper are applicable to 16-QAM soft-demapping in digital receivers that perform soft decision decoding or iterative decoding.
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页码：794 / 798
页数：5
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