moving target echo meaning in English

动目标回波

After analyzing the theory of mtdi and setting up the model of moving target echoes , the dissertation discusses in detail the effect of moving target doppler center frequency and doppler rate on the conventional sar image . it also analyzes detailedly the range migration of moving target from time field and frequency field and provides migration model in both fields . after that , it divides algorithms of mtdi into several classes , analyzes the influence of signal - to - noise on the detection results and gives the flow chart of moving target imaging processing
本文的主要贡献包括： 1 、建立了运动目标回波散射模型，深入探讨了进行常规sar成像时，动目标的多普勒中心频率和调频率对动目标图像造成的影响；从时域和频域两方面详细分析了由于目标运动造成的距离徙动效应，建立了距离徙动模型；然后研究了动目标检测原理，并对现有的检测方法进行分类，使之更加系统化；详细分析了动目标信噪比对检测结果的影响，给出了sar系统动目标成像流程图，指出了动目标成像中的关键环节。