Abstract: This paper studies the effect of the correlated noise responses on the false alarm probability of the CA-CFAR detector.The statistic characteristics of the noise responses are discussed in additive white Gaussian noise.The false alarm probability of the CA-CFAR detector is derived when the noise responses are correlative.A comparison is made with the false alarm probability on the assumption that the noise responses are statistically independent.Using the above expressions，the detection performance of the CA-CFAR detector is analyzed by simulation.The simulation experiments demonstrate that the correlation among different noise responses can be ignored in practical engineering.

Key words: polyphase filter bank, CA-CFAR detector, false alarm probability

摘要： 主要研究噪声响应之间的相关性对CA-CFAR检测器的虚警概率的影响。讨论了加性高斯白噪声环境中噪声响应的统计特性，推导了噪声响应相关情况下CA-CFAR检测器的虚警概率，与噪声响应相互独立的假设条件下的CA-CFAR检测器的虚警概率进行了比较。在上述情况下，对CA-CFAR检测器的检测性能进行了仿真。仿真结果表明在实际工程中可以忽略噪声响应的相关性。

关键词: 多相滤波器组, CA-CFAR检测器, 虚警概率