三路单脉冲雷达接收机DAGC技术的工程实现

分析单脉冲雷达接收机DAGC的基本原理,给出灵敏度时间(STC)控制、手动增益控制及自动增益控制的数字实现方法以及相应的硬件、软件结构框图。根据实践经验讨论了数字AGC技术工程化设计中需考虑的衰减量波动、数控衰减器在中频电路中引入的冲击振荡、频率捷变状态中通道增益和数字AGC技术实现对接收机增益控制等几个问题,以及解决途径。

Engineering Realization of DAGC Technology in the Three Pad Monopulse Radar Receiver

This paper analyzes the basic theory of the DAGC monopulse radar receiver,gives the digital realization methods as well as the structural and block diagram of corresponding hardware and software of the sensitivity time(STC) control,manual gain control and automatic gain control.Besides,on the basis of practical experience it discusses several problems such as fluctuation in attenuation,the shock oscillation in the IF circuit caused by the NC attenuator,the channel gain of frequency agility state and the realization of gain control for the receiver by the digital AGC technology,all of which should be considered in the engineering design of the digital AGC.The solutions to these problems are also given.