Efficient and accurate spectrum sensing is a necessary part in cognitive radio network. This paper focuses on the spectrum sensing in MIMO environment. Based on the fact that the correlation structure of the received signals is different between the cases of signal-presence and signal-absence, a new concept of local variance is presented and the test statistic is constructed by the local variance. The theoretical threshold is derived according to the asymptotic distribution theorem. Finally, the detection performance comparison with other methods in AWGN channel and Rayleigh channel are simulated respectively. The results show that the proposed method outperforms other algorithms and needs small sample numbers, thus it has higher sensing accuracy and efficiency.
贾琼,李兵兵. 基于局部方差的MIMO频谱感知算法研究[J]. 电子与信息学报, 2015, 37(7): 1525-1530.
Jia Qiong,Li Bing-bing. MIMO Spectrum Sensing Method Based on the Local Variance. JEIT, 2015, 37(7): 1525-1530.
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