Spectrum efficiency evaluation of LMF channels under various adaptation policies with hybrid diversity schemes
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- 作者：Vidhyacharan Bhaskar ; Vivek G. Rajendran
- 关键词：Spectrum efficiency ; Optimal power and rate adaptation (OPRA) policy ; Channel inversion with fixed rate (CIFR) policy ; Truncated channel inversion with fixed rate (TIFR) policy ; Hybrid diversity
- 刊名：Annals of Telecommunications
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：71
- 期：1-2
- 页码：15-26
- 全文大小：1,198 KB
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Vivek G. Rajendran (3)
1. Department of Electrical and Computer Engineering, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA, 94132, USA
2. Department of Electrical Engineering, Northwestern Polytechnic University, 47671 Westinghouse Drive, Fremont, CA, 94539, USA
3. Department of Electronics and Communication Engineering, SRM University, Kattankulathur, Kancheepuram Dt., 603 203, Tamil Nadu, India - 刊物类别：Engineering
- 刊物主题：Engineering, general
Electronic and Computer Engineering - 出版者：Springer Paris
- ISSN：1958-9395
文摘
A single-input multiple-output (SIMO) system with lognormal multipath fading (LMF) channel is considered in this paper. The spectrum efficiency (capacity per unit bandwidth) of a LMF channel for various adaptation policies is studied. We obtain the closed-form expressions for various adaptation policies such as (i) optimal power and rate adaptation (OPRA) policy, (ii) channel inversion with fixed rate (CIFR) policy, and (iii) truncated channel inversion with fixed rate (TIFR) policy with hybrid diversity combining techniques like hybrid maximal ratio combining (MRC)-equal gain combining (EGC), hybrid EGC-MRC, and hybrid MRC-selection combining (SC) diversity. Numerical results show that the use of hybrid diversity combining techniques improves the spectrum efficiency over stand-alone diversity combining techniques. OPRA policy that provides the highest spectrum efficiency when compared to other policies is also shown. Keywords Spectrum efficiency Optimal power and rate adaptation (OPRA) policy Channel inversion with fixed rate (CIFR) policy Truncated channel inversion with fixed rate (TIFR) policy Hybrid diversity