多径成型因子在智能电网认知无线电信道干扰分析中的应用

摘要

针对认知无线电网络多用户并发通信尚未解决的信道干扰问题,在莱斯衰落信道下引入小尺度多径成型因子进行建模,系统地分析了认知用户对主用户传输的信道干扰.数值分析表明:多径成型因子理论能有效分析认知无线电网络主用户和认知用户的并发通信干扰行为,并在满足主用户服务质量(Quality of Service,QoS)的需求上,动态地改变认知用户接入数目,提高了频谱资源的利用率.所提分析模型可以用于优化认知无线电技术在智能电网复杂场景中的应用性能.%Aiming at the unsolved channel interference problems of multi-user concurrent communication in cognitive radio network,this paper introduces small scale multipath shape factors into modeling under Rician fading channel and systematically analyzes the channel interference that cognitive user conducts over the primary user.Numerical analysis indicates that multipath shape factor theory can effectively analyze the concurrent communication interference between cognitive user and primary user.Meanwhile,in meeting the need of primary Quality of Service (QoS),it can dynamically change the access number of cognitive user and improve the utilization of spectrum resource.The analysis model proposed in this paper can be used to optimize the application performance of cognitive radio technology in the complex scene of smart grid.