Log-likelihood ratio (LLR) conversion schemes in orthogonal code hopping multiplexing

被引：30

作者：

Kwon, JK ^{[1
]}

Park, S ^{[1
]}

Sung, DK ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Elect Engn & Comp Sci, Taejon 305701, South Korea

来源：

IEEE COMMUNICATIONS LETTERS | 2003年 / 7卷 / 03期

关键词：

demapping; log-likelihood ratio (LLR); orthogonal code hopping multiplexing (OCHM); perforation;

D O I：

10.1109/LCOMM.2003.809994

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Log-likelihood ratio (LLR) conversion schemes are proposed to reduce the effect of perforations that occur in orthogonal code hopping multiplexing (OCHM), which was previously proposed to accommodate more downlink channels than the number of orthogonal codewords. The proposed LLR conversion schemes greatly reduce the required signal-to-noise ratio (SNR) in channel decoding even when the perforation probability is high. The performance of the proposed schemes is evaluated by simulation in terms of the required E-b/N-0 for a 1% block error rate.

引用

页码：104 / 106

页数：3

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