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基于迭代Radon-Wigner变换的FMCW-ISAR目标速度估计及速度补偿
常雯,李增辉,杨健
清华大学学报（自然科学版） ›› 2014, Vol. 54 ›› Issue (4) : 464-468.
PDF(1154 KB)
PDF(1154 KB)
基于迭代Radon-Wigner变换的FMCW-ISAR目标速度估计及速度补偿
Velocity estimation and compensation in FMCW-ISAR based on the iterative Radon-Wigner transform
在调频连续波逆合成孔径雷达(FMCW -ISAR)成像系统中,目标在扫描周期内的高速运动导致目标一维距离像的畸变及二维成像的模糊。为了获得高质量的ISAR目标成像结果,需对高速目标进行速度估计及补偿。该文针对FMCW-ISAR系统信号模型,提出了一种基于迭代Radon -Wigner变换对高速非合作目标进行速度估计和速度补偿的方法。仿真结果表明: 该方法能够对高速非合作目标的速度进行高精度估计,距离向和方位向速度补偿后可获得理想的ISAR成像结果。
In FMCW-ISAR system, fast-moving targets during the sweep repetition interval results in range profile aberrations and 2-D image blurring. Thus, velocity compensation is needed to acquire good ISAR image quality. This paper presents a method based on the iterative Radon-Wigner Transform to estimate the velocity and compensate for the signal model in FMCW-ISAR systems. Simulations show that the method gives accurate velocity estimates and much better 2-D FMCW-ISAR images by using velocity compensation for both the range and azimuth.
调频连续波(FMCW) / 逆合成孔径雷达(ISAR) / Radon-Wigner变换 / 速度估计 / 速度补偿
frequency modulation continuous wave (FMCW) / inverse synthetic aperture radar (ISAR) / Radon-Wigner transform / velocity estimation / velocity compensation
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