针对“猫眼”目标激光主动探测,从抑制噪声干扰和激光后向散射出发,研究了APD激光回波信号探测系统的组成原理和电路设计。设计了一种基于APD的激光回波接收放大电路,采用自动增益控制技术(AGC),同时给出了接收系统的控制时序逻辑图,并分别对窗帘、玻璃、光滑墙体,望远镜等目标的回波信号进行了接收实验和分析,提出了鉴别“猫眼”目标的方法,为后续“猫眼”目标识别的实验研究提供了依据。 In view of the “cat’s eye” target laser active detection, starting from the suppression of noise interference and laser backscattering, the composition principle and circuit design of APD laser echo signal detection system are studied. An APD-based laser echo receiver amplification circuit is designed. The automatic gain control (AGC) technique is used. At the same time, the timing diagram of the receiving system is given. Echo signals were received experiment and analysis, and the method of distinguishing “Cat’s Eye” was put forward, which provided the basis for the experimental research on Cat’s Eye target recognition.