Asymptotic Performance of Threshold-Based Generalized Selection Combining

被引：4

作者：

Ma, Yao ^{[1
]}

Dong, Xiaodai ^{[2
]}

Yang, Hong-Chuan ^{[2
]}

机构：

[1] Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA

[2] Univ Victoria, Dept Elect & Comp Engn, Victoria, BC V8W 3P6, Canada

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2009年 / 58卷 / 05期

关键词：

Combining gain; diversity gain; error rate; outage probability; threshold-based generalized selection combining (T-GSC); GSC; PROBABILITY; RECEIVERS; SYSTEMS; OUTAGE;

D O I：

10.1109/TVT.2008.2010050

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：

In this paper, we study the asymptotic performance of absolute-threshold- and normalized-threshold-based generalized selection combining (AT-GSC and NT-GSC) schemes over generalized fading channels for high average signal-to-noise ratios (ASNRs). By evaluating the asymptotic moment-generating function of the threshold-based GSC output SNRs, we derive the diversity and combining gains for AT- and NT-GSCs with a large class of modulation formats and versatile fading conditions, including different types of fading channels and nonidentical SNR statistics across diversity branches. Our analytical results reveal that the diversity gains of AT- and NT-GSC are equivalent to that of maximal-ratio combining, and the differences in the combining gains for different threshold values and modulation and diversity formats are derived by using the concept of modulation factors.

引用

页码：2579 / 2585

页数：7

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