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针对当前分布式多输入多输出(MIMO)雷达目标散射模型的不足,提出了一种三维特体目标模型;在考虑点散射体电磁散射的方向性、遮蔽及收发天线方位角、俯仰角等因素的条件下,推导了目标静态雷达截面积(RCS)的计算公式和MIMO雷达信道的相关函数;同时,仿真分析了目标动态RCS的统计模型及其与收发天线双基地角的关系,以及MIMO雷达信道空间去相关的条件。仿真分析结果与RCS的经典统计模型、双基地RCS的经验结论以及单基地雷达回波信号去相关角度的经验值是吻合的,证实了模型的科学性和合理性。研究结果对分布式MIMO雷达的检测、跟踪和系统配置等研究具有参考价值。
Aiming at the shortcomings of the current target scattering model of distributed multiple input multiple output (MIMO) radar, a three-dimensional object model is proposed. Taking into account the direction of electromagnetic scattering of point scatterers, the azimuth and the elevation angle of shielding and transmitting / receiving antennas, , The calculation formula of target static radar cross-sectional area (RCS) and the correlation function of MIMO radar channel are deduced. At the same time, the statistical model of target dynamic RCS and its relationship with the bistatic angle of the transceiver antenna are simulated and analyzed. Channel space to be related to the conditions. The results of simulation analysis are in good agreement with the classical statistical models of RCS, the empirical conclusions of bistatic RCS and the empirical values of decorrelation angle of single-base radar echo signals, which proves the scientificity and rationality of the model. The research results have reference value for the research of detection, tracking and system configuration of distributed MIMO radar.