一、引言许多雷达应用对数接收机来压缩接收信号的动态范围,进行比幅测角,或进行对数单元平均恆虛警检测等,这些应用很重要,但也要应用正确。本文的目的是要通过阐述测角、测距、恆虛警、检测、信噪比估计等几个问題,力求较系统介绍对数接收机的特性。为了使概念更清楚,主要是介绍理想对数接收机情况,而在信噪比较大时,也是完全实际的;另外也尽量避免引入烦杂的数学推导。文中引入了随机变量函数的线性化近 I. INTRODUCTION Many applications of logarithmic receivers compress the dynamic range of the received signal, compare the amplitude angle, or detect the average CFAR detection of logarithmic units. These applications are very important, but they should also be applied correctly. The purpose of this paper is to try to describe the characteristics of logarithmic receiver systematically by elaborating several problems such as angle measurement, ranging, constant false alarm, detection, signal-to-noise ratio estimation and so on. In order to make the concept clearer, it is mainly to introduce the ideal logarithmic receiver situation, but also quite realistic when the signal-to-noise ratio is relatively large; Also try to avoid introducing complicated mathematical derivation. In this paper, the linearization of random variable function is introduced