Performance Study for SWIPT Cooperative Communication Systems in Shadowed Nakagami Fading Channels
Performance Study for SWIPT Cooperative Communication Systems in Shadowed Nakagami Fading Channels
复制标题
阴影 Nakagami 衰落信道中 SWIPT 协作通信系统的性能研究
DOI：
10.1109/twc.2017.2776933
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发表时间：
2018-02-01
影响因子：
10.4
通讯作者：
Ji, Fei
中科院分区：
文献类型：
--
作者：
Feng, Yizhi;Leung, Victor C. M.;Ji, Fei
在本文中，我们研究了在阴影Nakagami-m衰落信道中同时进行无线信息和电力传输的协同放大转发通信系统的性能。相干和非相干调制，即二进制相移键控（BPSK）和二进制微分相移键控（BDPSK）被考虑。我们提出了合作链路接收信噪比的矩产生函数和概率密度函数的封闭表达式。在此基础上，进一步推导了BPSK和BDPSK调制下系统的平均误码率和中断概率表达式。除一个表达式为单积分形式外，其他表达式均为封闭形式，该表达式易于用数值积分方法求值。数值结果验证了所提分析结果的有效性。结果表明，系统的性能对衰落参数m的影响比对阴影电平σ (s)的影响更大，且随功率分割比的变化不大。
In this paper, we investigate the performance of simultaneous wireless information and power transfer cooperative amplify-and-forward communication systems in shadowed Nakagami-m fading channels. Both coherent and non-coherent modulations, namely, binary phase-shift keying (BPSK) and binary differential phase-shift keying (BDPSK) are considered. We propose closed-form expressions of the moment generating function and the probability density function for the received signal-to-noise ratio of the cooperative link. Based on this, we further derive the average bit-error-rate and the outage probability expressions for the systems with both BPSK and BDPSK modulations. All of these expressions are given in closed-form except one in single integral that can be easily evaluated using numerical integration methods. Numerical results are used to confirm the validity of the proposed analytical results. It is shown that the performance of the systems is more susceptible to the fading parameter m than to the shadowing level sigma(s) and does not change much with the power splitting ratio.