机载雷达接收机抗干扰电路设计研究

Research on Radar Receiver Anti-Jamming Circuit Design

摘要: 以接收机为主要对象，总结了接收机典型的抗干扰方法，并通过实验仿真先是针对宽限窄、邻近噪声自动增益控制、IAGC、多级滤波等抗干扰措施在每秒100万个脉冲的干扰信号情况下，分别测试了干扰信号的脉宽分别为100%大于/60%大于/100%小于雷达信号的脉冲宽度的情况下加入抗干扰电路前后的信干比变化情况，给出了三组量化分析数据；其后量化分析了接收机滤波器时宽带宽积在0.6~0.8之间变化时滤波前后的噪声能量比，从而为接收机滤波器带宽的选择提供了一些量化依据。

Abstract: Taking airborne radar receiver for an example, this dissertation elaborates some key technologies of anti-jamming, the automatic testing of AGC, IAGC and multi-filtering under one million jamming pulse every second through the computer simulation system. The system tests the width of the jamming pulse which is 100% bigger, 60% bigger and 100% smaller than the radar signal respec-tively, and demonstrates the SNR curve. Three groups of quantitative analysis data are given; than the quantitative analysis of the receiver filter bandwidth of noise energy before and after filtering when changes in 0.6 ~ 0.8 is presented. The study in this dissertation will not only provide the uni-versal technique for the development of radar receiver, but also provide a valuable reference to the engineering application of other electronic equipment in our nation.