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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Ergodic Capacity Analysis of Full Duplex Relaying in the Presence of Co-Channel Interference in V2V Communications
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Ergodic Capacity Analysis of Full Duplex Relaying in the Presence of Co-Channel Interference in V2V Communications

机译：V2V通信中存在同信道干扰的全双工中继的遍历容量分析

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摘要

We analyze the ergodic capacity of a dual-hop full duplex amplify-and-forward (AF) vehicle-to-vehicle (V2V) cooperative relaying system over Nakagami- fading channels. In this context, the impacts of self-interference (SI) at the relay and co-channel interference (CCI) at the destination are taken into account in this analysis. Precisely, based on the analysis of the moment generating function (MGF) of the signal-to-interference-plus-noise ratio (SINR), new exact and lower bound expressions for the ergodic capacity are derived. The ergodic capacity upper bound is also derived based on the asymptotic outage probability of the approximated SINR. Monte-Carlo simulation results are presented to corroborate the derived analytical results. Our results show the significant impact of the considered interferences on the system performance. It is shown that the ergodic capacity is degraded when the average SI at the relay and/or the average CCI at the destination is increased. This highlights the importance of taking these phenomena into account in the performance evaluation in order to assess the practical limit of full duplex relaying (FDR) cooperative wireless communications. Interestingly, it is also observed that FDR with SI and CCI still shows a higher ergodic capacity than the interference-free half duplex relaying, especially at medium to high signal-to-noise ratios (SNRs).
机译：我们分析了中跳衰落信道上双跳全双工放大转发（AF）车对车（V2V）协作中继系统的遍历容量。在这种情况下，在此分析中考虑了中继站上的自干扰（SI）和目的地上的同信道干扰（CCI）的影响。准确地，基于对信号干扰加噪声比（SINR）的矩生成函数（MGF）的分析，得出了遍历容量的新的精确和下界表达式。还基于近似SINR的渐近中断概率来得出遍历容量上限。提出了蒙特卡洛模拟结果以证实得出的分析结果。我们的结果表明，所考虑的干扰对系统性能的重大影响。结果表明，当中继站的平均SI和/或目的地的平均CCI增加时，遍历容量会降低。这突出了在性能评估中考虑这些现象的重要性，以便评估全双工中继（FDR）协作无线通信的实际限制。有趣的是，还观察到具有SI和CCI的FDR仍比无干扰的半双工中继显示出更高的遍历容量，尤其是在中等到高的信噪比（SNR）下。

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