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测向敏感性分析对高性能阵列雷达系统设计和参数校正具有重要意义。针对MIMO雷达系统误差的测向敏感性问题,基于MUSIC算法的一阶泰勒展开,研究了由MIMO雷达收、发阵元幅度、相位和位置误差引起的实际阵列与理想阵列间存在的流型误差对测向性能的影响;三种误差条件下分别定义和推导了任意阵型配置下MIMO雷达测向敏感因子、方位估计RMSE以及成功分辨误差门限的表达式。仿真实验验证了理论推导和分析方法的有效性,相关结论可为MIMO雷达系统分析与设计提供参考。
Directional sensitivity analysis is of great importance to the design and parameter correction of high performance array radar system. Aiming at the direction finding sensitivity of MIMO radar system errors, based on the first-order Taylor expansion of MUSIC algorithm, the flow pattern errors between the real array and the ideal array caused by the amplitude, phase and position error of the AMR are studied. The results show that the DFR of MIMO radar under any kind of error conditions is defined and derived under three kinds of error conditions respectively. The simulation results verify the effectiveness of the theoretical derivation and analysis methods, and the related conclusions can provide reference for the analysis and design of MIMO radar systems.