摘要
已有寄生反向散射通信网络依赖于收发机之间存在的直达链路,从而无法应用于直达链路深度衰落或不存在场景。针对上述问题,该文提出一种中继辅助的寄生反向散射通信网络,并分析所提网络的中断性能。具体而言,依据所提网络推导得到主系统和次系统的瞬时信噪比,并在考虑次用户能量因果约束的条件下定义了主次系统中断概率,接着利用数学知识推导得到瑞利衰落模型下的主次系统中断概率表达式,最后通过计算机仿真验证了所推导的主次系统中断概率表达式的准确性,并分析了不同系统参数对主、次系统中断概率的影响。
The existing parasitic backscatter communications rely on the direct links between transceivers and do not work when the direct links are blocked or fade deeply.To solve this problem,a relay-assisted parasitic backscatter communication network is proposed,base on which its outage performance is analyzed.Specifically,according to the proposed network,the instantaneous signal-to-noise ratios to decode the primary and secondary systems are given,and then the outage probabilities of primary and secondary systems on the basis of the energy-causality constraint of the secondary user are defined.Under the Rayleigh channel fading model,the expressions for the outage probability of the primary and secondary systems can be obtained by exploiting mathematical theory.Computer simulations validate the accuracy of the derived primary and secondary system outage probabilities,on which the impacts of different system parameters are analyzed.
作者
宋曦
韩东升
SONG Xi;HAN Dongsheng(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)
出处
《电子与信息学报》
EI
CAS
CSCD
北大核心
2024年第6期2452-2461,共10页
Journal of Electronics & Information Technology
基金
国家自然科学基金(61771195)
河北省省级科技计划(SZX2020034)。
关键词
反向散射通信
能量收集
中继
中断概率
Backscatter communications
Energy harvesting
Relay
Outage probability
