LFMCW雷达运动目标距离与速度超分辨估计  

Super-resolution Range and Velocity Estimation of Moving Target in LFMCW Radar

作　　者：杨勇[1] 谭渊[1] 张晓发[1] 袁乃昌[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《信号处理》2010年第4期626-630,共5页Journal of Signal Processing

摘　　要：超分辨谱估计算法能得到比传统周期图法高得多的分辨率,针对LFMCW雷达动目标检测问题,本文提出一种基于状态矢量空间方法的LFMCW雷达距离与速度超分辨估计方法。文中介绍了状态矢量空间方法的基本原理并分析了三角LFMCW雷达上、下扫频段差频信号的特点,使用基于状态矢量空间方法估计差频信号频谱,同时给出了相应的运动目标距离与速度的估计算法。该算法解决了LFMCW雷达动目标去耦问题,与传统FFT方法相比提高了运动目标距离与速度的分辨率和估计精度。仿真结果证明了该算法的有效性。The super resolution spectral estimation can obtain higher resolution than conventional periodogram method.In this paper a super resolution range and velocity estimation algorithm is presented,which is based on the state space method and proposed for moving target detection in linear frequency-modulated continuous wave（LFMCW） radar.This paper introduces the state space method and analyzes the characteristic of the up-sweep and down-sweep beat signals of triangular LFMCW radar.Using the state space method the spectra of the beat signals are acquired.Then according to the state space method the range and velocity estimation algorithm of moving targets is proposed.This algorithm solves the problem of range-velocity decoupling;improves the range and velocity resolution and estimation precision of moving target in LFMCW radar.Simulation results prove the efficiency of the algorithm.

关 键 词：线性调频连续波 状态矢量空间 距离分辨率 超分辨 

分 类 号：TN958.94[电子电信—信号与信息处理]