【作者】 徐坚；

【导师】 黄顺吉； 吴井红；

【作者基本信息】 电子科技大学 ， 通信与信息系统， 2001， 硕士

【摘要】 合成孔径雷达（SAR）具有全天候和高分辨能力，近年来它得到了快速的发展。合成孔径雷达融合了近代的计算机技术和先进的数字信号处理技术，在许多领域，如大地遥感、测绘、资源探测、灾情预报、军事指挥等得到了日益广泛的应用。 合成孔径雷达实时信号处理技术是八十年代末发展起来的一门高新技术。其中高分辨率SAR成像，数据量大，实时性强，这就要求系统结构合理，处理速度快，算法和软件效率高。 本文对合成孔径雷达的理论、应用特点进行了讨论，给出了SAR实时信号处理机的实现方法。在分析SAR信号处理算法特点的基础上，处理机采用了高效的与算法形式相对应的系统硬件结构。在众多的DSP芯片中，选择了先进的LH9124Y40专用DSP配以EPLD可编程逻辑芯片作为实时距离压缩和方位压缩处理的核心部件。 另外，本文对EDO动态存储器芯片的接口控制方法进行了探讨，并将它应用在转置矩阵处理板中。这对今后SAR成像中转置处理的实现有一定的参考价值。更多还原

【Abstract】 Synthetic Aperture Radar has all梬eather and high梤esolution capabilities and has been highly developed in recent years. Computer science and modern signal processing methods now make it possible for SAR to increasingly apply its techniques in many areas such as remote sensing and mapping, exploration of terrestrial resources, catastrophe forecast, military maneuvering and etc.The technique of real梩ime processing of Synthetic Aperture Radar has been developed since the end of 1980抯, so far as high resolution SAR imaging, for its large quantity of data and strong real梩ime request, require reasonable system structure, high梥peed processing and high efficient algorithms and software.This paper discusses the theory of SAR and it抯 characteristics in application, and provides the method that can be realized in SAR real梩ime processor. Based on the analysis of the characteristic of SAR signal processing algorithms, the processor adopts a kind of efficient structure, which corresponds to the algorithms that are used in the system. Among all the digital signal processing chips, combining with embedded programming logic device, we selected LH9124Y40 which is the advanced DSP as the most important part in the real梩ime processing board of range compressing and azimuth compressing.In addition, this paper discusses the method of interface control on the Extended桪ata桹ut Dynamic RAM, and the application of it iii the data corner turn array processing board, which is valuable to the realization of data corner turn array processing in SAR imaging in the future.更多还原