发射波形合成下的机载MIMO雷达杂波统一模型  

Clutter Uniform Model of Airborne MIMO Radar Based on Transmit Waveform Synthesis

作　　者：徐武军[1] 张西川[2,3] 王睿[2] 杨少春[2] 

机构地区：[1]中国飞行试验研究院,西安710089 [2]空军工程大学导弹学院,陕西三原713800 [3]空军雷达学院,武汉430019

出　　处：《电光与控制》2010年第10期41-45,共5页Electronics Optics & Control

基　　金：国家自然科学基金重点项目资助课题(60736099)

摘　　要：针对发射波形相关及非理想因素影响下的机载MIMO雷达杂波分布特性的问题,给出了理想情况下机载MIMO雷达杂波模型。利用信号集合及阵列导向矢量投影变换的原理,提出了基于波形合成的机载MIMO雷达杂波统一模型,分析了模型与理想MIMO雷达、相关MIMO雷达及相控阵雷达的统一关系。然后给出了多种非理想因素影响的误差矩阵,建立了非理想因素影响下的机载MIMO雷达杂波统一模型。最后仿真分析了波形相关及非理想因素影响下的MIMO雷达杂波特性,并得出结论:波形合成会产生子阵合成,当合成子阵间发射信号全正交,且合成子阵内各阵元发射信号全相干时,杂波谱的斜脊线最窄。该统一模型为机载MIMO雷达杂波特性分析及STAP算法设计提供了理论依据。This paper focuses on the effect of transmit waveform synthesis and unideal factors on clutter characteristics for airborne MIMO radar.Firstly,the clutter model of airborne MIMO radar under ideal situation is descried.The uniform clutter model of airborne MIMO radar is presented based on transmit waveform synthesis,using the projection transposition theory of signal set and array steering vectors.The uniform relationships among the ideal MIMO radar,correlation MIMO radar and phase array radar under the model are analyzed.Secondly,the uniform clutter model of airborne MIMO radar under unideal factors is presented using the error matrix.Finally,the clutter characteristics with transmit waveform synthesis and unideal situation are analyzed through simulation.The conclusion is ：1） waveform synthesis may result in subarray synthesis;and 2） the clutter spectrum can be mitigated when the transmit of subarrays are orthogonal and the inner waveforms in the subarrays are coherent.The uniform model is effective for the analysis of clutter characteristics and the design of STAP algorithm.

关 键 词：机载MIMO雷达 发射波形合成 非理想因素 杂波统一模型 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计] TN957.51[电子电信—信号与信息处理]