机构地区: 西安电子科技大学电子工程学院雷达信号处理国家重点实验室
出 处: 《雷达科学与技术》 2005年第4期221-226,231,共7页
摘 要: 介绍了单脉冲三维成像的原理,分析了目标角运动对成像的影响;针对由于目标角运动产生的差波束方向图调制问题,提出了基于ISAR像的角运动参数估计与补偿方法:首先用预偏置技术减小多普勒谱展宽,利用自适应窗选取多个ISAR像中的孤立散射点,然后将测角结果进行加权平均作为参数估计值,实现角运动补偿。仿真结果证实了本方法的有效性。 The principle of mono-pulse 3-D imaging is introduced and the effects of target angle movement on the imaging are analyzed in this paper. For the problem of amplitude modulation in difference signal caused by the angle movement of target, angle movement parameters estimation and compensation based on ISAR profile are given. The pre-bias technique is applied to reduce the widening of doppler spectrum. Isolated scatter points are selected by an adaptive window function. The angle movement compensation is realized by the weighted average of the measured results. The simulation shows the effectiveness of the new method.