Differential modulation for cooperative wireless systems

被引：96

作者：

Zhao, Qiang ^{[1
]}

Li, Hongbin ^{[1
]}

机构：

[1] Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA

来源：

IEEE TRANSACTIONS ON SIGNAL PROCESSING | 2007年 / 55卷 / 05期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

average bit error rate (BER); cooperative diversity; differential modulation; outage probability; wireless relays;

D O I：

10.1109/TSP.2006.890922

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 examines differential binary modulation for wireless networks that utilize wireless relays to seek cooperative diversity and improved performance. Two differential cooperative transmission schemes, referred to as differential amplify-and-forward (DAF) and differential decode-and-forward (DDF), respectively, are introduced. These schemes require no channel state information at any node in the system. A set of analytical results pertaining to the probability density function of the instantaneous signal-to-noise ratio, average bit error rate, outage probability, and diversity order of the proposed schemes in Rayleigh fading channels are obtained. The analytical results are confirmed by numerical simulations. It is shown that the differential cooperative DAF and DDF schemes achieve cooperative diversity and outperform the conventional noncooperative differential modulation.

引用

页码：2273 / 2283

页数：11

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