Performance Analysis of Cooperative Diversity with Incremental-Best-Relay Technique over Rayleigh Fading Channels
Performance Analysis of Cooperative Diversity with Incremental-Best-Relay Technique over Rayleigh Fading Channels
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DOI：
10.1109/tcomm.2011.053111.080672
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发表时间：
2011-06
影响因子：
8.3
通讯作者：
S. Ikki;M. Ahmed
中科院分区：
文献类型：
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作者：
S. Ikki;M. Ahmed
在本文中，我们介绍了增量最佳中继协作分集的综合分析，其中我们利用来自目的地终端的有限反馈，例如，指示直接传输成功或失败的单个比特。如果目的地通过反馈提供否定确认；则仅在这种情况下，M个可用中继器中的最佳中继器重发源信号，试图通过组合在目的地从信源和最佳中继器接收的信号来利用空间分集。此外，我们还研究了采用译码转发和放大转发的增量最佳中继协作分集网络在独立的非相同瑞利衰落信道上的端到端性能。确定了误码率、中断概率和平均信道容量的闭合表达式。结果表明，与常规协作分集网络相比，增量最佳中继协作分集可以获得最大可能的分集阶数，具有更高的信道利用率。特别是，增量最佳中继技术可以在低信噪比下获得M+1阶分集阶，在高信噪比下获得可观的虚拟阵列增益。
In this paper, we introduce a comprehensive analysis of the incremental-best-relay cooperative diversity, in which we exploit limited feedback from the destination terminal, e.g., a single bit indicating the success or failure of the direct transmission. If the destination provides a negative acknowledgment via feedback; in this case only, the best relay among M available relays retransmits the source signal in an attempt to exploit spatial diversity by combining the signals received at the destination from the source and the best relay. Furthermore, we study the end-to-end performance of the incremental-best-relay cooperative-diversity networks using decode-and-forward and amplify-and-forward relaying over independent non-identical Rayleigh fading channels. Closed-form expressions for the bit error rate, the outage probability and average channel capacity are determined. Results show that the incremental-best-relay cooperative diversity can achieve the maximum possible diversity order, compared with the regular cooperative-diversity networks, with higher channel utilization. In particular, the incremental-best-relay technique can achieve M+1 diversity order at low signal-to noise ratio (SNR) and considerable virtual array gain at high SNR.