一种机载SAR地面运动目标成像模块设计  

Design of the Ground Moving Target Imaging Processor of an Airborne SAR

作　　者：夏斌[1] 许稼[1] 彭石宝[1,2] 彭应宁[1] 

机构地区：[1]清华大学电子工程系,北京100084 [2]空军雷达学院雷达成像中心,湖北武汉430019

出　　处：《雷达科学与技术》2011年第3期213-218,共6页Radar Science and Technology

基　　金：国家自然科学基金(No.60971087)

摘　　要：针对一体化机载合成孔径雷达/地面运动目标指示(SAR/GMTI)处理器实现多功能同步的难题,提出一种基于混合SAR/ISAR处理的地面运动目标成像处理模块设计,复用距离脉压数据实现场景成像、动目标检测以及动目标成像功能的并行。结合集成了多处理器的分布式内存体系结构的数字信号处理板卡,通过同构设计和链式数据缓存,每片DSP和其外存构成独立的成像处理节点。同时链路口互联结构可发送当前子孔径的脉压结果实现同步缓存,因此各成像节点可并发响应上位机对已检测动目标的成像请求。基于外场实测数据的处理结果证明了该设计的有效性。To deal with the issue of multifunctional synchronized implementation for airborne SAR/GMTI processor,a hybrid SAR/ISAR processing based ground moving target imaging module design is proposed.The range compressed data are multiplexed for parallelization of static scene imaging,moving target detection and imaging.Combining with the architecture of the multi-processor digital signal processing board,homogenous function and buffering scheme are designed,which makes the DSP processor and its external memory constitute an independent imaging node.Besides,the link port based interconnection can transmit the range compressed sub-aperture data for synchronous buffering,thus,each node can concurrently execute the request for imaging the detected moving target of interest.Experimental results based on the measured real data validate the effectiveness of the proposed design.

关 键 词：合成孔径雷达 地面运动目标指示 运动目标成像 

分 类 号：TN957.51[电子电信—信号与信息处理] TN958[电子电信—信息与通信工程]