调频脉冲雷达信号的伸缩处理方法与DDR技术  

Stretch-processing Method and DDR Technique for LFM Pulsed Radar

作　　者：孙长贵[1] 李兴国[1] 黄亚 

机构地区：[1]南京理工大学,南京210094 [2]空军驻南京地区第二军代表室,南京210013

出　　处：《现代雷达》2003年第11期31-35,共5页Modern Radar

摘　　要：宽带线性调频信号 ,是一种高分辨雷达信号。用伸缩处理方法可以获得目标高分辨距离像 ,并能够对静止目标实现精确测距。本文分析了速度对这种波形的测距精度和成像质量的影响。在分析三角波调制的线性调频信号的基础上 ,提出了用DDR技术消除速度对测距的影响方法。同时 ,提出了将两步伸缩处理方法用于处理宽带线性调频脉冲雷达信号。通过理论推导和仿真 ,证明了这种方法的可行性。Wide band LFM wave form is a kind of HRR wave form. Using stretch-processing method, high resolution range profile of the target can be obtained, and the range to a stationary target can be exactly measured. Influences to range precision and the quality of range profile by the speed of moving target are analyzed. On the bases of analyzing triangle wave form modulated LFM, the method of using DDR (Dual Channel Directional Doppler Range) technique to eliminate the influence of speed to range is presented. At the same time the two-step stretch-processing method applied to wide band LFM pulsed radar signal is suggested. By theoretical derivation and simulation, the feasibility of stretch-processing method is proved.

关 键 词：调频脉冲雷达 信号处理 伸缩处理 DDR 距离像 三角波调制 

分 类 号：TN957.51[电子电信—信号与信息处理]