摘要
机动目标存在非匀速转动甚至是三维转动,其多普勒曲线相对复杂,经典的距离-多普勒(RD)ISAR成像算法性能急剧下降。针对匀加速旋转目标,本文提出了一种基于离散匹配傅里叶变换(DMFT)的成像方法。该方法利用了匀加速旋转目标的回波特点,直接完成横向聚焦,而无需对调频斜率不同的各散射点回波逐个补偿。仿真试验证明了该方法的有效性。
Maneuvering targets have nonuniform rotation and even three-dimensional rotation. The Doppler curves are respectively more complex, so the performance of traditional Range-Doppler （RD） ISAR imaging method went down rapidly. Aiming at the equably accelerative rotating targets, a new imaging algorithm based on discrete matching Fourier transform （DMFT） is presented in this pa- per. The algorithm making use of the characteristic of the echo of equably accelerative rotating targets achieves cross-range focusing di- rectly, and need not to compensate the frequency modulation signal with different slopes. Computer simulation illuminated the validity of this algorithm.
出处
《信号处理》
CSCD
北大核心
2009年第6期864-867,共4页
Journal of Signal Processing
关键词
匹配傅里叶
ISAR
匀加速旋转
matching Fourier transform
ISAR
equably accelerative rotating
