用于分布式天基SAR系统低速运动目标检测的空时波形优化设计  

Space-Time Bi-phase Encoded Waveform Optimal Design for Distributed Space-Based Radar Systems

作　　者：黎薇萍[1] 洪伟[1] 陶海红[1] 廖桂生[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《电子学报》2008年第12期2383-2388,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60472097);国防基础预研基金(No.A1420060172-06);教育部科学技术研究重点项目(No.107102)

摘　　要：本文提出了一种空时波形优化设计方法,该方法将零相关区序列集应用于多发单收体制下的分布式小卫星雷达系统,实现了在单颗接收卫星上直接进行地面运动目标检测(SAR-GMTI),使得多颗卫星之间不需要进行通讯和数据传送.这种特殊的二相编码信号作为发射信号,其回波信号与多路发射信号分别进行匹配之后的输出信号均在特定区域(主峰旁边)值很小而且具有一致的主瓣形状和旁瓣形状,因此对于目标附近的强杂波具有很好的抑制作用.仿真结果验证了优化波形的有效性和可行性.A waveform optimal design algorithm is presented in the paper, which utilizes zero correlation zone codes in the multiple-input single-output system used for sparse space-borne radar. It is shown that a single satellite receiver is sufficient for SAR-GMTI. The special bi-phase encoded waveforms are transmitted by multiple satellites, the echoes from all transmit satellites are received by one satellite. After separating by different signal match filters, the main-lobes in the special region of the pulse compression results are almost identical,and the side-lobes are low. And so, the clutter, around the detected cell, can be rejected by the presented algorithm. The simulation results show that the proposed algorithm is effective and feasible.

关 键 词：天基多发单收雷达系统 零相关区域序列集 波形优化 合成孔径雷达-运动目标检测 

分 类 号：TN957[电子电信—信号与信息处理]