Joint time-frequency transform for radar range Doppler imaging
Joint time-frequency transform for radar range Doppler imaging
复制标题
DOI：
10.1109/7.670330
复制
发表时间：
1998-04-01
影响因子：
4.4
通讯作者：
Qian, S
中科院分区：
文献类型：
--
作者：
Chen, VC;Qian, S
传统的雷达成像使用傅立叶变换来恢复多普勒信息。然而，由于目标的复杂运动，多普勒频移实际上是时变的。通过使用傅里叶变换，多普勒频谱变得模糊，图像变得模糊。该方法不需要复杂的运动补偿算法，可以通过联合时频变换解决图像模糊问题。研究了高分辨率时频变换，并给出了在复杂运动的单目标和多目标雷达成像中的应用实例。
Conventional radar imaging uses the Fourier transform to retrieve Doppler information. However, due to the complex motion of a target, the Doppler frequency shifts are actually time-varying. By using the Fourier transform, the Doppler spectrum becomes smeared and the image is blurred. Without resorting to sophisticated motion compensation algorithms, the image blurring problem can be resolved with the joint time-frequency transform. High-resolution time-frequency transforms are investigated, and examples of applications to radar imaging of single and multiple targets with complex motion are given.