A Low-Complexity Spectrum Sensing Method for Noncircular Signal in Cognitive Radio Networks With Multiple Receive Antennas

A Low-Complexity Spectrum Sensing Method for Noncircular Signal in Cognitive Radio Networks With Multiple Receive Antennas
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具有多个接收天线的认知无线电网络中非圆形信号的低复杂度频谱感知方法

DOI:
10.1109/lcomm.2019.2916863
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发表时间:
2019-05
期刊:
IEEE Communications Letters
影响因子:
--
通讯作者:
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中科院分区:
其他
文献类型:
--
作者:
Chen An Zhi;Shi Zhi Ping;Sun Hongxia;He Zhen Qing;Bu Fan;Yang D;i

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本文主要研究多天线认知无线网络中非圆信号的频谱感知问题。为了充分利用主信号的NC特性,提出了一种新的检测方法NC局部平均方差(NC- lav)。首先推导了主用户缺席时NC- lav统计量的分布。在此基础上,给出了NC-LAV方法的渐近阈值确定方法。与同类方法相比,本文提出的NC-LAV方法具有较低的复杂度。同时,仿真结果表明,该方法比现有的几种方法具有更好的性能。
This letter concentrates on the spectrum sensing (SS) problem for noncircular (NC) signal in multiantenna cognitive radio networks. A novel detection method called NC local average variance (NC-LAV) is developed to exploit the NC characteristic of the primary signals for SS. The distribution of the NC-LAV statistic in the absence of primary user is first derived. Then, based on the derived distribution, we present an asymptotic threshold determination of the proposed NC-LAV method. Compared to the peer methods, the proposed NC-LAV method exhibits much lower complexity. Meanwhile, the simulation results reveal that the proposed method achieves better performance than several state-of-the-art methods.
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