Adaptive modulation over Nakagami fading channels

被引：50

作者：

Alouini, Mohamed-Slim ^{[1
,3
,4
,5
,6
,7
,8
]}

Goldsmith, Andrea J. ^{[2
]}

机构：

[1] Communications Group, Department of Electrical Engineering, California Institute of Technology, Pasadena, CA, United States

[2] Department of Electrical Engineering, Mail Code 9515, Stanford University, Stanford, CA 94305-9515, United States

[3] Dept. of Elec. and Comp. Engineering, University of Minnesota, 200 Union Street S.E., Minneapolis, MN 55455, United States

[4] Ecl. Natl. Sup. des Telecom., Paris, France

[5] University of Pierre and Marie Curie, Paris, France

[6] Georgia Institute of Technology, Atlanta, GA, United States

[7] California Institute of Technology, Pasadena, CA, United States

[8] Dept. of Elec. and Comp. Engineering, University of Minnesota, Minneapolis, MS, United States

来源：

Wireless Personal Communications | 2000年 / 13卷 / 01期

关键词：

Bit error rate - Channel capacity - Communication channels (information theory) - Estimation - Fading (radio) - Numerical methods - Probability - Radio links - Spectrum analysis;

D O I：

10.1023/a:1008979107539

中图分类号：

学科分类号：

摘要：

We first study the capacity of Nakagami multipath fading (NMF) channels with an average power constraint for three power and rate adaptation policies. We obtain closed-form solutions for NMF channel capacity for each power and rate adaptation strategy. Results show that rate adaptation is the key to increasing link spectral efficiency. We then analyze the performance of practical constant-power variable-rate M-QAM schemes over NMF channels. We obtain closed-form expressions for the outage probability, spectral efficiency and average bit-error-rate (BER) assuming perfect channel estimation and negligible time delay between channel estimation and signal set adaptation. We also analyze the impact of time delay on the BER of adaptive M-QAM.

引用

页码：119 / 143