快衰落信道下修正的卡方-AD联合检测  

Modified chi-square-AD joint detection on fast fading channels

作　　者：王海泉[1] 雷绍婷[1] 沈雷[1] 

机构地区：[1]杭州电子科技大学,浙江杭州310018

出　　处：《电路与系统学报》2013年第1期28-32,共5页Journal of Circuits and Systems

基　　金：浙江省自然科学基金资助项目(Y1090846);国家自然科学基金资助项目(60972049);通信抗干扰国家重点实验室基金资助项目(9140C020405110C0204);教育部回国人员启动基金资助项目

摘　　要：本文提出了一种经过变换的拟合优度检测方法。通过对接收到的样本进行某种变换,再对变换后的新序列使用Anderson Darling(AD)检测,在噪声方差已知和未知两种情况下,分别给出了检测方法。为了增强检测性能,在方差未知情况下对卡方-AD检测提出了修正方法。仿真结果表明,使用修正的卡方-AD联合检测能够大大提高快衰落信道中频谱检测的性能,在噪声方差未知情况下取得了突破性的检测效果。Based on a transformation of goodness-of-fit test,this paper proposes methods of spectrum sensing.Specifically,Anderson-Darling（AD） test,a kind of goodness-of-fit test,is applied into a new sequence which is a transformation of received samples,conditioning on known or unknown noise variance.To enhance performance of sensing,a modified chi-square-AD joint test is also proposed under a condition of unknown noise variance.Simulations show that,for a fast fading channel,the modified chi-square-AD joint test greatly improves the performance of spectrum detection,and makes a breakthrough when the noise variance is unknown.

关 键 词：认知无线电 AD检测 卡方分布 能量检测 

分 类 号：TN911.72[电子电信—通信与信息系统]