电波科学学报2012，Vol.27Issue(2)：246-254,9.
线性调频步进信号雷达目标运动参数估计方法
Motion parameter estimation for frequency-stepped chirp signal ISAR target
摘要
Abstract
Motion parameter estimation method based on time-frequency analysis is proposed to overcome the influence of the target movement on its image in frequency-stepped chirp signal radar system.By taking the Fourier transform for the echo after dechirp firstly,based on the linear frequency modulation of the subpulses sequence,the motion parameter at every time can be estimated by the method which is combined by Wigner-Ville distribution（WVD） and Radon transform.Then,the binary mathematical morphology and edge detection method is used to improve the accuracy of the velocity estimation of the target which contains many scatterers.Finally,the least-square algorithm is used to obtain the motion parameters with better accuracy when the maneuvering target velocity varied within the imaging time.Simulation verifies the validity of motion parameter estimation method proposed in this paper.关键词
线性调频步进信号/运动目标/时频分析/二值数学形态学/最小二乘算法Key words
frequency-stepped chirp signal/moving target/time-frequency analysis/binary mathematical morphology/least squares algorithm分类
信息技术与安全科学引用本文复制引用
何劲,张群,罗迎,朱小鹏,邓冬虎..线性调频步进信号雷达目标运动参数估计方法[J].电波科学学报,2012,27(2):246-254,9.基金项目
国家自然科学基金 （）
陕西省自然科学基金 （）
空军工程大学电讯工程学院科研创新基金 （）
