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通常认为，硬限幅脉冲压缩加非相干积累系统自身具有恒虚警（ＣＦＡＲ）性能．通过对这一系统的恒虚警性能的理论分析，指出系统具有恒虚警性能是有条件的．在杂波背景下，由于杂波剩余在方位上存在相关性，这一系统一般不具有恒虚警性能，且系统的改善因子也因此而下降．为使系统具有恒虚警性能，文中提出了去相关处理方法，推导了ｋ个相关高斯随机变量（ｋ维高斯过程）平方和的概率分布，给出了系统具有ＣＦＡＲ性能的充要条件，因而可以对该系统的恒虚警性能做定量分析，这对于雷达工程设计及现有雷达改进都具有指导意义．最后的仿真试验验证了分析结果
It is generally accepted that hard-limit pulse compression plus non-coherent accumulation systems have CFAR performance per se. Through the theoretical analysis of the CFAR performance of this system, it is pointed out that the system has CFAR performance is conditional. In the background of clutter, due to the existence of clutter residual correlation in azimuth, the system generally does not have CFAR performance, and the system’s improvement factor is also reduced. In order to make the system have a constant false alarm performance, the dissertation proposes a decorrelation method and derives the probability distribution of the sum of squares of k related Gaussian random variables (k-dimensional Gaussian process). The necessary and sufficient conditions for the CFAR performance of the system are given. Quantitative analysis of CFAR performance of the system can be done, which is instructive for radar engineering design and existing radar improvement. The final simulation test verifies the analysis results