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中文摘要：
多天线系统由于可以提高频谱感知可靠性而被广泛应用于认知无线电中。提出了一种适用于多天线系统的盲频谱检测方法。首先，计算不同天线间接收信号的相关系数；其次，对相关系数做适当的变换使其服从学生分布；最后取变换之后的相关系数的均值作为检验统计量，并推导了其判决门限。理论分析和仿真表明，与噪声方差已知的能量检测（ED）以及基于最大最小特征值之比的频谱盲检测算法（MME）相比，所提算法具有更好的检测性能。
英文摘要：
Multiple antennas are widely used in cognitive radio system in that it can improve the spectrum sensing performance. A new cooperative spectrum sensing in multi-antenna cognitive radio is proposed. Firstly, the correlation coefficients between each antenna are calculated. Secondly, the author makes appropriate transformation of every correlation coefficient so as to obey students＇ distribution. Finally, a new test is constructed by the use of correlation coefficient＇ s mean and the theoretical threshold is given. Both analysis and numerical results show that the proposed method outperforms the energy detection（ED） method with noise variance known and the MME method.
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