N-P准则与CA-CFAR检测技术研究

在杂波和噪声环境下脉冲雷达对杂波和噪声进行统计分析处理,确定杂波和噪声的概率分布模型,选择相应的恒虚警检测方法,以检测目标回波信号。N-P准则不能随环境的变化而调整门限,虚警概率较高;而CA-CFAR检测能够根据参考窗内的信号的特性,自适应调整检测门限,虚警概率较低。文章研究了N-P准则和CA-CFAR检测技术的基础,并对二者的检测性能进行了仿真分析比较。

Study of N-P Principle and CA-CFAR Detection Technology

Pulse radar is used to detect the target echo signal from the surroundings of the clutter and noise,because it can analyze and process the statistical performance of the clutter and noise,accordingly its probability distribution models are decided,as a result the CFAR detection method is choose.N-P principle could not adjust the threshold with the signal surroundings,so its false alarm probability is higher,while the CA-CFAR detection method could analyze the performance of the signal in the reference window statistically,and could adjust the self-adaptive threshold with the signal surroundings,so its false alarm probability is low.The basic of the N-P principle and CA-CFAR,and whose detection performances are simulated,analyzed and compared.