混合双跳PLC-FSO通信系统的性能分析

doi:10.11959/j.issn.1000-436x.2021199

摘要/Abstract

摘要：

提出了一种混合双跳PLC-FSO通信系统。PLC链路和FSO链路通过放大转发中继连接。具体地，假设PLC 链路受附加背景噪声和脉冲噪声影响，其信道衰落服从对数正态分布，而 FSO 链路受大气湍流影响信道衰落满足Gamma-Gamma分布，并考虑指向误差影响。基于该模型，分别推导了中断概率、误码率和信道容量的闭式表达式来分析系统的性能。此外，给出了中断概率和误码率的渐近分析以及信道容量的上限表达式。最后，利用蒙特卡罗仿真验证了推导结果的准确性，结果表明系统中断概率随着指向误差参数的增大而减小；PLC链路脉冲噪声越小，误码率越低，系统整体性能越好；系统容量随着湍流强度的降低而增加。

关键词: 误码率, 中断概率, 信道容量, 电力线通信和自由空间光通信系统

Abstract:

A dual-hop power line communication and free-space optical communication (PLC-FSO) system was proposed, where an amplify-and-forward (AF) relay was applied to help the signal transmission between the PLC link and the FSO link.More specifically, it was assumed that the PLC link was affected by both additive background noise and impulsive noise, and the channel fading followed log-normal distribution, while the fading induced by the atmospheric turbulence in the FSO link followed a Gamma-Gamma distribution, and the effect of pointing errors was also considered.Based on this model, closed-form expressions for the outage probability, bit error rate, and the channel capacity were derived.In addition, asymptotic analysis for the outage probability and BER, and upper bound expression for the channel capacity were presented.Finally, the accuracy of the analytical results was justified through Monte-Carlo simulations.The results show that the system outage probability decreases as the pointing error parameter increases and the smaller the PLC link impulse noise, the lower the bit error rate.The system capacity increases as the turbulence intensity decreases.

Key words: bit error rate, outage probability, channel capacity, power line communication and free-space optical commu-nication system

中图分类号:

TN92

陈生海, 言小琴, 黎赛, 杨亮. 混合双跳PLC-FSO通信系统的性能分析[J]. 通信学报, 2021, 42(10): 243-250.

Shenghai CHEN, Xiaoqin YAN, Sai LI, Liang YANG. Performance analysis of dual-hop PLC-FSO communication system[J]. Journal on Communications, 2021, 42(10): 243-250.

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参数	值
P_i	0.05, 0.14, 0.32
m₁	8
m₂	8
η	15
C	1.2
G	3

参数	值
σ_SR	0.23
h_l	1
σ_s	0.3
a	2.5
w	2.7
γ_th	0