A Unified Performance Analysis of Relaying Communication System for IoT Application With Hybrid Fading
A Unified Performance Analysis of Relaying Communication System for IoT Application With Hybrid Fading
复制标题
混合衰落物联网应用中继通信系统的统一性能分析
DOI：
10.1109/jiot.2019.2951179
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发表时间：
2020-01-01
影响因子：
10.6
通讯作者：
Zeng, Honghai
中科院分区：
文献类型：
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作者：
Chen, Zhixiong;Wang, Lijiao;Zeng, Honghai
电力线和无线混合通信解决了物联网中无线和电力线无法相互通信的问题。然而，基于混合衰落条件的放大转发中继通信的理论性能没有封闭的表达式。本文以无线与电力线混合介质的中继系统模型为代表，研究了混合衰落AF中继系统的统一性能分析方法。采用基于矩源函数（MGF）的混合对数正态（LogN）近似算法对混合LogN分布进行无线衰落系数近似。此外，考虑到MGF方程中的可调变量对逼近精度的影响较大，提出了一种确定关键参数的联合优化算法。重要的是，本文随后扩展到其他衰落模型，以一般伽马（GG）为例。通过蒙特卡罗仿真验证了该算法的有效性和可靠性。最后，导出了误码率、中断概率和平均信道容量等系统性能的封闭解析表达式。利用理论公式分析了混合衰落因子、脉冲噪声参数和功率分配对系统性能的影响。
Power line and wireless hybrid communication address the problem that wireless and power line cannot communicate with each other in the Internet of Things (IoT). However, the theoretical performance of amplify-and-forward (AF) relay communication based on hybrid fading condition has no closed expression. This article takes a relay system model of wireless and power line hybrid media as a representative and investigates a unified performance analysis method for AF relay systems with hybrid fading. The mixture lognormal (LogN) approximate algorithm based on the moment-generating function (MGF) is applied to approximate a wireless fading coefficient to mixture LogN distribution. Moreover, we propose a joint optimization algorithm for determining the key parameters given that the adjustable variables in the MGF equations evidently affect the approximation accuracy. Importantly, this article is then extended to other fading models, taking general gamma (GG) as an example. The effectiveness and reliability of the algorithm are verified by the Monte Carlo simulation. Finally, closed analytic expressions of the system performance, such as bit error rate (BER), outage probability, and average channel capacity, are derived. The effects of hybrid fading factor, impulse noise parameter, and power allocation on system performance are analyzed using the theoretical formulas.