基于循环平稳的多天线渐进最优χ2检测算法

doi:10.3969/j.issn.1000-436x.2012.z2.032

通信学报 ›› 2012, Vol. 33 ›› Issue (Z2): 228-232.doi: 10.3969/j.issn.1000-436x.2012.z2.032

基于循环平稳的多天线渐进最优χ₂检测算法

孔庆磊,高玉龙

哈尔滨工业大学通信技术研究所，黑龙江哈尔滨150080

出版日期:2012-11-25 发布日期:2017-08-03
基金资助:
中央高校基本科研业务费专项基金资助项目;黑龙江省博士后科研启动基金资助项目

Novel cyclostationary multiple antenna spectrum sensing approach based on asymptotic optimal χ₂ test

Qing-lei KONG,Yu-long GAO

Communication Research Center,Harbin Institute of Technology,Harbin 150080,China

Online:2012-11-25 Published:2017-08-03
Supported by:
The Fundamental Research Funds of The Central Universities;Postdoctor Research Funds of Heilongjiang Province

摘要/Abstract

摘要：

为了提高基于循环平稳感知方法的检测性能，减少深衰落对感知性能的影响，提出了一种基于多天线合并方案的频谱感知算法，即将循环自相关函数和循环谱密度函数进行一种改进的最大增益比合并，并通过渐进最优χ2检测法得出检验统计量。该种算法可以在感知信号和噪声幅值信息未知的情况下对信号的有无进行检测。为了验证提出方法的正确性，以BPSK信号为例对提出的算法进行仿真检验，仿真结果表明多天线感知算法的性能优于单天线感知，减少了深衰落对接收信号的影响。

关键词: 认知无线电, 循环谱感知, 多天线, 渐进最优χ2检测法

Abstract:

In order to improve the performance of cyclostationary spectrum sensing,reduce the influence of deep fading,a new approach of combining the multiple received signals by multiple antennas was proposed,which means that exploited an improved MRC combination of cyclic autocorrelation and cyclic spectrum,and got the test statistic calculated by implementing asymptotic optimal χ² test.This approach could detect the existence of the transmitting signal without amplitude prior information.BPSK modulation signal was applied as an example to testify the accuracy of the approach.The results indicate that multiple antennas spectrum sensing has more advantage that single antenna,reduces the influence of deep fading.

Key words: cognitive radio, cyclostationary detection, MIMO

孔庆磊,高玉龙. 基于循环平稳的多天线渐进最优χ₂检测算法[J]. 通信学报, 2012, 33(Z2): 228-232.

Qing-lei KONG,Yu-long GAO. Novel cyclostationary multiple antenna spectrum sensing approach based on asymptotic optimal χ₂ test[J]. Journal on Communications, 2012, 33(Z2): 228-232.

图/表 4

参考文献 14

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基于循环平稳的多天线渐进最优χ₂检测算法

Novel cyclostationary multiple antenna spectrum sensing approach based on asymptotic optimal χ₂ test

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