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
王海泉 1雷绍婷 1沈雷1
作者信息
- 1. 杭州电子科技大学,浙江杭州310018
- 折叠
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,在噪声方差己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.
Abstract
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Key words
cognitive radio/AD detection/the chi-square distribution/energy detection引用本文复制引用
基金项目
浙江省自然科学基金(Y1090846)
国家自然科学基金(60972049)
通信抗干扰国防重点实验室基金(9140C020405110C0204)
教育部回国人员科研启动项目()
出版年
2013
NETL
NSTL
维普
万方数据