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本文研究衰落信道上的协作频谱感知性能，给出了虚警概率和检测概率的取值上下界。在给定的虚警概率或检测概率下，推导出了控制信道上错误概率的取值范围。最后研究了检测概率和虚警概率在低信噪比下的近似关系。“,”In this paper, we investigate the performance of cooperative spectrum sensing over fading channels. We derive the upper-and lower-bounds of the overall false alarm probability and overall detection probability as a function of the bit error probabilities of the cognitive radio-fusion center (CR-FC) links. Given an overall false alarm probability or overall detection probability, we derive the relationships of error probabilities of the CR-FC links that should be satisfied. We also investigate the relationship between the overall detection probability and the overall false alarm probability when the SNR of the primary user signal at each CR node is small.