基于认知无线电的WiMAX系统共存方案研究  

Research on Coexistence of WIMAX System by Cognitive Radio

作　　者：唐宏[1] 鲁玉芳[1] 黄秋宴[1] 

机构地区：[1]移动通信技术重庆市市级重点实验室重庆邮电大学通信学院,重庆400065

出　　处：《电视技术》2011年第3期81-84,共4页Video Engineering

基　　金：国家"863"计划项目(2009AA011302);教育部春晖计划项目(Z2007-1-63002)

摘　　要：如何利用广播电视频段及免授权频段中的空闲频谱、防止干扰和实现共存对WiMAX系统有重要意义。根据WiMAX系统标准,结合认知无线电技术,研究通过调整信号带宽和利用频谱池技术实现WiMAX系统共存。利用Matlab仿真软件,在移动WiMAX基带链路上,以频谱池思想为基础,对使用认知无线电前后的WiMAX系统性能进行了仿真分析。仿真结果表明,采用认知无线电技术后,避免了一级用户与二级用户之间的干扰,极大地提高了频谱利用率,实现了系统间的共存。How to utilize the spare spectrum of television spectrum and unlicensed spectrum, avoid interference and achieve coexistence is very important to WiMAX system. According to the WiMAX system standard and cognitive radio technology, this paper researches on the WiMAX coexistence by spectrum pool technology and signal bandwidth. By Matlab simulation software, the paper simulates WiMAX system performance before and after the use of cognitive radio based on the mobile WiMAX systems baseband link and the spectrum pool technology. The simulation results show that using cognitive radio technology not only reduce the interference to secondary user, but also avoid influencing on prime user. Meanwhile, the spectrum utilization is greatly improved, and the coexistence has been achieved between systems.

关 键 词：WiMAX共存 认知无线电 Welch检测 信号带宽 频谱池 

分 类 号：TN929.5[电子电信—通信与信息系统]