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机载广域监视模式是多功能机载雷达的重要模式之一.对广域监视模式进行的系统设计将在很大程度上影响最终动目标的检测及跟踪效果.因此,我们重点研究了多通道广域监视雷达的系统设计问题.推导了含有偏流角信息的广域监视雷达回波表达式.给出了系统信噪比和杂噪比的计算方法.这些都是进行系统设计的基础.详细分析了广域监视雷达系统设计时的四个关键因素,包括:距离走动和距离弯曲分析,杂波谱分析,多载频系统和多PRF系统分析,每个波位脉冲数分析.这四个关键因素都进行了仿真并在仿真后给出了相关结论.“,”Wide area surveillance-ground moving target detection (WAS-GMTI) mode is one of the important modes for most multi-functional airborne radar.System design of the WAS-GMTI mode can affect the final moving targets detection and tracking abilities to a great extent.Therefore,research focuses on the system design of multi-channel WAS-GMTI radar system.The expression of WAS-GMTI radar echo (including the crab angle) is derived.Signal to noise ratio (SNR) and clutter to noise ratio (CNR) are presented.These are the preparations and foundations for the further discussion.Four key points are detailedly analyzed in the process of system design of WAS-GMTI radar,including range walk and range curvature analysis,clutter spectrum analysis,multi-frequency system and multi-PRF system analysis,number of pulses per burst analysis.Besides,these four key points are simulated and some conclusions are drawn after each discussion.