Performance Analysis of Bidirectional Communication Protocols Based on Decode-and-Forward Relaying
Performance Analysis of Bidirectional Communication Protocols Based on Decode-and-Forward Relaying
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DOI：
10.1109/tcomm.2010.080310.090292
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发表时间：
2010-09
影响因子：
8.3
通讯作者：
Peng Liu;Il Kim
中科院分区：
文献类型：
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作者：
Peng Liu;Il Kim
我们研究并比较了三种非常典型的基于解码转发中继的双向通信协议的性能：时分广播（TDBC）、物理层网络编码（PNC）和机会源选择（OSS）。我们首先推导出PNC和OSS协议的精确封闭形式的中断概率，以及TDBC协议的精确但只有一个积分形式的中断概率。为了获得更深入的了解，我们还推导了所有协议的封闭形式渐近中断概率表达式，由此我们获得了高信噪比（SNR）下OSS协议相对于TDBC协议的渐近最优功率分配、渐近最优中继位置和性能增益的进一步分析结果。最后，我们研究了在有限信噪比和无限信噪比条件下每种协议的分集-复用权衡（DMT）。
We study and compare the performance of three very typical bidirectional communication protocols based on the decode-and-forward relaying: time-division broadcast (TDBC), physical-layer network coding (PNC), and opportunistic source selection (OSS). We first derive the exact closed-form outage probabilities for the PNC and OSS protocols and an exact but one-integral form outage probability for the TDBC protocol. To gain more insight, we also derive closed-form asymptotic outage probability expressions for all protocols, with which we obtain further analytical results on the asymptotic optimal power allocation, the asymptotic optimal relay location, and the performance gain of the OSS protocol over the TDBC protocol in the high signal-to-noise ratio (SNR) regime. Finally, we study the diversity-multiplexing tradeoff (DMT) for each protocol both in the finite and infinite SNR regimes.