认知无线电频谱检测机制研究

为了提高认知用户检测效率、改善认知用户检测性能以及提高频谱资源利用率,从检测模式、检测周期、检测时长和检测信道等多个角度,对认知无线电频谱检测机制中检测参数和检测策略的选取及优化方法进行了理论推导和定量分析。研究结果表明,通过对检测机制中参数和策略的优化,可解决认知无线电中仅凭借单纯物理层检测算法在检测效率和检测性能方面的局限性,在保护授权用户免受干扰的同时增加了认知用户的频谱接入机会。在此基础上进一步提出了认知无线电频谱检测机制中几个下一步研究方向及其难点问题和相关的解决方案。

Research on Spectrum Sensing Mechanisms of Cognitive Radio

CR（Cognitive Radio） spectrum sensing mechanisms are studied to improve the performance of spectrum sensing and the efficiency of spectrum utilization.The research is performed by analyzing options of sensing parameters and optimizing sensing schemes from aspects of sensing mode,sensing period,sensing interval and sensing channel.Results show that optimizations of sensing parameters and schemes are useful for solving the limitation of pure physical layer based spectrum sensing algorithms,protecting primary users from interference and increasing CR users＇ access opportunities.Furthermore,future research directions,possible challenges and corresponding solutions of CR spectrum sensing mechanisms are also provided.