基于频域波形分析的调频步进雷达测距测速新方法  

Novel method of range and velocity measurement based on frequency domain waveform analysis in stepped chirp radar

作　　者：刘振[1] 魏玺章[1] 黎湘[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院空间电子信息技术研究所,湖南长沙410073

出　　处：《系统工程与电子技术》2011年第8期1756-1759,共4页Systems Engineering and Electronics

基　　金：国家杰出青年科学基金(60025102)资助课题

摘　　要：调频步进雷达存在时延-多普勒耦合,对目标测距测速造成严重的影响。在分析其多普勒性能的基础上,通过采样点位置得到目标的粗距离。然后,根据距离-速度耦合关系得到目标的粗速度,经过二次项补偿后再通过频域波形分析获得目标各散射点的真实距离。最后,通过解耦合得到目标精确速度。详细分析了这一解距离速度耦合的新方法,提出了基于频域波形分析法测距测速的具体步骤。仿真结果表明,这种方法在采样率较高和速度不模糊时具有较好的效果。The inherent delay-Doppler coupling in stepped-chirp radar has a severe impact on range and velocity measurement.Based on the analysis of its Doppler performance,the rough range is firstly achieved according to the sampling time and thus the rough velocity is gotten through the range-velocity coupling,which will be used in compensation for the quadratic item of echo phase.Then the waveform of frequency domain is analyzed to get the precise range of each scatter center,and finally the precise velocity is obtained.The new method of resolving the range-velocity coupling is analyzed in detail and the steps of range and velocity measurement based on frequency-domain waveform analysis are given.Simulation results prove that this method has a better performance at a high sampling rate and non-ambiguous velocity.

关 键 词：宽带雷达 测距 测速 波形分析 模糊函数 

分 类 号：TN958.6[电子电信—信号与信息处理]