调频步进信号高速运动目标径向速度精确测量技术研究  

Accurate Velocity Measurement of High Speed Moving Target about Stepped-frequency Chirp Signal

作　　者：袁昊天[1] 文树梁[1] 程臻[1] 

机构地区：[1]航天科工集团二院二十三所研发中心,北京100854

出　　处：《电子学报》2009年第3期649-653,共5页Acta Electronica Sinica

摘　　要：针对调频步进信号高速运动目标径向速度影响合成距离像问题,提出一种复合测速方法.首先利用窄带跟踪距离的微分值对回波进行速度补偿和包络移动,其次对正正步进频率信号进行相关处理并构造跟踪回路以实现速度粗略估计和跟踪,然后再利用跟踪速度微分值补偿加速度,最后对正负步进频率信号进行相关处理,实现速度的精确测量.仿真结果证明了该方法的可行性.To solve the effect of the velocity on the range profile, a compound velocity measurement method for the stepped- frequency Chirp signal is presented. With the derivation of narrowband tracking ranges, velocity compensation and envelope migration are finished. Then with the correlation processing of the positive-positive stepped-frequency signals, and followed with the tracking loop, the velocity is coarse estimated and tracked. After that the acceleration is compensated with the tracking velocity derivation. At last with the correlation processing of positive-negative stepped frequency signals, the precise velocity is obtained. Simulation results prove the feasibility of the proposed method.

关 键 词：调频步进信号 速度测量 高速运动目标 正负相关 

分 类 号：TN958[电子电信—信号与信息处理]