一种分阶段频谱感知算法的研究  

Study on Spectrum Sensing Algorithm Capable of Differentiating Each Stage

作　　者：孙竞超[1] 曹慧[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《信息安全与通信保密》2011年第6期48-50,共3页Information Security and Communications Privacy

基　　金：国家自然科学基金资助项目(批准号:60962001);广西科学基金资助项目(编号:0731025;0991018Z)

摘　　要：能量检测算法简单并有利于伺机快速接入,但是不能很好地区分出不同的用户;循环特征检测算法可区分出不同的用户且有利于规避干扰,但是其算法复杂并且接入十分缓慢。针对上述两种算法的各自优势和不足,提出了一种分阶段联合检测算法,分阶段地利用能量检测和循环特征检测,不但能够保证接入快速并且可以较好地规避干扰。增大了基站的业务量并且进一步提高了频谱利用效率。Energy detection is easy and convenient for quick access,but can＇t distinguish different users,while collaborative detection can distinguish different user,but is complicated in algorithm. This paper,in view of the advantages and the weaknesses of the both algorithms,proposes a new spectrum sensing algorithm capable of differentiating each stage. This method employs both the energy detection and the collaborative detection in the different stage. Thus it has many advantages including rapid access,interference avoidance, and could raise the traffic volume of base station and improve the efficiency of spectrum.

关 键 词：认知无线电 频谱感知 能量检测 循环特征检测 

分 类 号：TN925[电子电信—通信与信息系统]