无线通信系统中无线携能通信技术的性能研究

摘要

Energy constraint is the bottleneck for the application of wireless sensor networks (WSNs).In order to provide the WSNs with stable and sustainable energy,simultaneous wireless information and energy transfer (SWIPT) attracted more and more attention.In SWIPT system,synchronous transmission of information and energy seriously fits the pursuit of green energy,which will significantly prolong the lifetime of the energy-constrained networks (such as the wireless sensor networks,military battlefield communications,and etc.).In this paper,we mainly derive the performance difference between cooperative relay system and SWIPT cooperative relay system,which use the dynamic power allocation method.We deduced the closed-form of outage probability expression and the channel capacity for SWIPT amplify and forward (AF) relay system.The correctness of our theoretical derivation has been verified by MATLAB simulation.%能量受限是无线传感器网络应用中存在的瓶颈问题之一,为了使无线传感器网络获得稳定持续的能量来源,无线携能通信技术(SWIPT)越来越受到人们的关注.在SWIPT系统中,信息结合能量的同步传输十分契合无线通信对于绿色节能的要求,极大地延长了能量受限网络(如无线传感器网络、军事战场通信等)的使用寿命.本文重点研究中继协作系统与携能技术相结合后,动态功率分配技术对原有系统的性能影响.给出系统中断概率以及信道容量的闭合表达式.通过MATLAB验证推导理论的正确性.