BER-Based Adaptation in Composite Fading Channel

被引：0
|
作者：
Bobarshad, H. [1 ]
Bahaei, M. R. Shikh [1 ]
Kobravi, A. [1 ]
机构：
[1] Kings Coll London, London WC2R 2LS, England
来源：
2008 IEEE 19TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS | 2008年
关键词：
Based; MQAM; power adaptation; rate adaptation; composite fading channel;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Bit error rate (BER)-based constrained optimization of average spectral efficiency for adaptive Multi-level Quadrature Amplitude Modulation (MQAM) with service rate and power constraint is studied under composite Gamma-Lognormal fading channel condition. We obtain the corresponding optimal schemes for power and rate adaptation for continuous and discrete rate MQAM. The optimal power for continuous rate QAM is shown to be a combination of two functions; one of which with water-filling nature and the other proportional to log(I/(BER)), whereas for discrete rate QAM the solution is proportional to log(1/(BER)) over each rate region. We have also shown that transmission rate is a monotonically increasing function of BER.
引用
收藏
页码：48 / 52
页数：5
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