Performance Analysis of Cooperative-Diversity Wireless Systems with Adaptive Modulation and Imperfect Channel State Information

被引：0

作者：

Chen, Hao ^{[1
]}

Ahmed, Mohamed H. ^{[2
,3
]}

Venkatesan, Ramachandran ^{[2
]}

机构：

[1] Verafin Inc, St John, NF, Canada

[2] Mem Univ Newfoundland, Fac Engn & Appl Sci, St John, NF A1B 3X9, Canada

[3] Univ Sharjah, Engn Coll, Dept Elect & Comp Engn, Sharjah, U Arab Emirates

来源：

2011 7TH INTERNATIONAL WIRELESS COMMUNICATIONS AND MOBILE COMPUTING CONFERENCE (IWCMC) | 2011年

基金：

加拿大自然科学与工程研究理事会;

关键词：

Cooperative diversity; adaptive modulation; imperfect channel state information; amplify-and-forward; NETWORKS; ERROR;

D O I：

暂无

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Cooperative diversity is achieved by utilizing neighboring terminals as relays. These relays can forward copies of the same signal to the destination using independent paths to provide spatial diversity. One of the main challenges of cooperative diversity is the throughput loss due to the extra resources needed for relaying. Adaptive modulation can be used to convert the Signal-to-Noise Ratio (SNR) gain (from the cooperative diversity) to throughput enhancement in order to compensate for the throughput loss. The availability of accurate Channel State Information (CSI) is essential for cooperative-diversity systems. However, perfect CSI is not always available in wireless systems. In this paper, we determine analytically the average throughput and bit error rate (BER) of cooperative-diversity systems with adaptive modulation and imperfect CSI over Rayleigh fading channel. Simulation results are also used for verification. Results show that imperfect CSI slightly lowers the throughput gain of the cooperative-diversity system. However, the cooperative-diversity system with imperfect CSI still outperforms the direct transmission.

引用

页码：1698 / 1703

页数：6

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