Generalized selection combining based on the log-likelihood ratio

被引：16
|
作者：
Kim, SW [1 ]
Kim, YG
Simon, MK
机构：
[1] Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA
[2] Seoul Natl Univ, Dept Elect Engn, Seoul 130743, South Korea
[3] Univ Calif Los Angeles, Los Angeles, CA USA
来源：
IEEE TRANSACTIONS ON COMMUNICATIONS | 2004年 / 52卷 / 04期
关键词：
diversity; envelope detection; generalized selection combining (GSC); log-likelihood ratio (LLR); Rayleigh fading channel;
D O I：
10.1109/TCOMM.2004.826368
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：
We propose a generalized selection combining (GSC) scheme for binary signaling in which a subset of diversity branches providing the largest magnitude of log-likelihood ratio (LLR) are selected and combined. It is shown that the bit-error probability with maximum ratio combining (MRC) or square-law combining of L branches is identical to that with LLR-based GSC of L/2 branches. We also propose a simple, but suboptimal, GSC based on a noncoherent envelope detection and discuss its potential advantages over the conventional signal-to-noise-ratio-based GSC and MRC.
引用
收藏
页码：521 / 524
页数：4
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