多个斯威林4型目标输出信号近似服从高斯分布研究

Study on the Approximate Gaussian Distribution of the Outputs for Multiple Swerling 4 Targets

为了将对瑞利目标的检测与分辨方法应用于多个斯威林4型目标的检测与分辨,该文主要研究了多个斯威林4型目标存在时输出信号近似为高斯分布的条件。首先推导了多个斯威林4型目标存在时雷达接收机输出信号的概率分布;在此基础上,通过仿真获得了输出信号近似为高斯分布的条件,即多个目标中回波功率最大的两个目标的信噪比相差不大于7dB。

The condition under which the output signals of monopulse radar receiver with two Swerling 4 targets are approximate to the Gaussian distribution has been studied in order to apply the detection and estimation methods of Rayleigh targets to Sweriling 4 targets. First, the probability density function（pdf） of the outputs under multiple Swerling targets are derived; then get the condition, under which the pdf of the outputs is approximate to Gaussian distribution, that the difference between the SNRs of two targets, whose return＇s power are the biggest among the targets, is not more than 7 dB.