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Analysis of reactive multi-branch relaying under interference and Nakagami-m fading

机译：干扰和Nakagami-m衰落下的无功多分支中继分析

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摘要

The performance of reactive decode-and-forward multi-branch relaying in the presence of co-channel interference and Nakagami fading is analytically investigated. Intermediate relays that successfully decode the received signals from the source node form a decoding set, from which the relay whose corresponding branch results in the highest signal-to-interference-plus-noise ratio (SINR) at the destination node is chosen to serve as the best relay. The selected relay re-encodes the source message and forwards it to the destination while the remaining relays keep idle. For this relaying scheme, we first obtain the exact end-to-end SINR expression by considering the general case of Nakagami-m fading channels. Then, the exact unconditional probability density function (PDF) of the end-to-end SINR is explicitly derived. With the resulting PDF, exact closed-form expressions for the outage and error probabilities are obtained. Moreover, to gain insights into the system performance, asymptotic analysis of the error probability is performed. Finally, Monte-Carlo simulation results are presented to corroborate the analysis, and comparative numerical results are discussed.
机译：分析了共信道干扰和Nakagami衰落情况下无功解码和转发多分支中继的性能。成功解码从源节点接收到的信号的中间中继形成一个解码集，从中选择其相应分支在目标节点处产生最高信噪比（SINR）的中继作为最好的接力。选定的中继将对源消息进行重新编码，然后将其转发到目标，而其余的中继将保持空闲状态。对于这种中继方案，我们首先通过考虑Nakagami-m衰落信道的一般情况来获得确切的端到端SINR表达式。然后，明确推导出端到端SINR的精确无条件概率密度函数（PDF）。使用生成的PDF，可以获得停机和错误概率的精确封闭式表达式。此外，为了获得对系统性能的了解，对误差概率进行了渐进分析。最后，给出了蒙特卡洛模拟结果以证实该分析，并讨论了比较数值结果。

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