合成孔径雷达
计算机科学
时频分析
逆合成孔径雷达
计算机视觉
人工智能
雷达成像
多普勒效应
傅里叶变换
动目标指示
运动估计
谱密度估计
雷达
算法
遥感
脉冲多普勒雷达
物理
地质学
电信
滤波器(信号处理)
量子力学
天文
作者
Penghui Huang,Guisheng Liao,Zhiwei Yang,Xiang-Gen Xia,Ji Ma,Xuepan Zhang
出处
期刊:IEEE Transactions on Geoscience and Remote Sensing
[Institute of Electrical and Electronics Engineers]
日期:2016-04-01
卷期号:54 (4): 1940-1956
被引量:89
标识
DOI:10.1109/tgrs.2015.2490582
摘要
In synthetic aperture radar (SAR) imaging of a ground moving target, long-time coherent integration may effectively improve the imaging quality, whereas the imaging performance may severely degrade due to the range migration and the Doppler frequency migration. In this paper, a novel motion parameter estimation method named second-order Wigner-Ville distribution (SoWVD) transform is proposed, and then, a new SAR imaging method based on the SoWVD for a ground moving target is developed. As a modified Wigner-Ville distribution method, the SoWVD method can estimate the motion parameter without the search procedure, which achieves motion parameter estimation by Fourier transform operations in the 2-D frequency plane with respect to the slow time and the delay time. In addition, it can effectively recognize the cross terms based on multiple symmetrical properties of the peaks in the 2-D frequency domain. Both simulated and real data processing results are presented to validate the proposed imaging method.
科研通智能强力驱动
Strongly Powered by AbleSci AI