基于毫米波InISAR成像的运动目标探测与定位

Moving target detection and location based on millimeter-wave InISAR imaging

介绍了基于运动补偿的运动目标ISAR成像方法,将雷达成像的概念引入到低信噪比运动目标探测的过程中,在成像的同时获取目标的径向和横向运动速度,采用多基线图像干涉处理的方法完成运动目标的定位和横向尺寸估计.建立了运动目标成像几何模型,给出了多天线时分复用接收机的通道间信号补偿方法,以及多基线相位解缠实现不模糊干涉测角定位的方法,分析了信噪比对图像干涉定位精度的影响.利用仿真数据和实际数据验证了本方法的有效性.

An inverse synthetic aperture radar （ISAR） imaging method based on motion compensation of a moving target was presented. The concept of radar imaging was applied to the process of moving target detection with low signal to noise ratio（SNR）. The lateral and radial velocity of the target can be acquired by means of imaging processing. The location of the moving target and estimation of its cross-sectional area could be fulfilled using the multi-baseline image interferometric method. The geometric model for imaging moving target was established. A method for the compensation of signals from channels of multi- antenna time division multiplexing （TDM） receiver was proposed. The unambiguous angle orientation based on multi-baseline phase unwrapping was presented. The influence of the image SNR on interferometric orientation accuracy was analyzed. The validity of the proposed method was testified by both simulation and an examole of its aoolication.