摘要
微动可以作为逆合成孔径雷达(ISAR)识别弹道中段目标的重要特征量,基于微多普勒效应的ISAR成像能极大缩短相干处理时间,但强度较大的微动会引起目标在距离上的走动和方向上的散焦.根据微动的ISAR成像技术,推导了弹道中段目标旋转微动模型,提出了基于伴飞式的旋转微动调制干扰方法.这种干扰能保留弹头的微动信息,在运动补偿时使真实回波的距离走动不能完全被消除,同时形成距离-方位扩展条带式干扰.仿真结果表明,合适的调制参数将使目标成像完全淹没在二维条带式干扰内,从而验证了该方法的有效性.
Micro motion can be treated as an important characteristic of inverse synthetic aperture radar（ISAR） identifying midcourse ballistic target. ISAR imaging based on the micro-Doppler effect greatly shortensthe coherence processing time, but the micro-motion with great intensity will cause image to move in range anddefocus in azimuth. According to the micro-Doppler-based ISAR imaging technology,this paper deduces arotating micro-motion model of midcourse ballistic target, and puts forward a rotating micro-motion modulationjamming method based on escort jamming. In this method the warhead’s micro movement information remains;in the motion compensation process the movement in range of true echo cannot be eliminated completely, and inthe same time, the range-azimuth band interference is formed. Simulation shows that appropriate modulationparameter results in target images completely overwhelmed in the band-mode jamming, thus verifying theavailability of the proposed method.
出处
《空军预警学院学报》
2017年第6期413-417,共5页
Journal of Air Force Early Warning Academy
