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阵列互耦、幅相误差和阵元位置误差的综合影响会严重影响超分辨率算法的性能,为此,针对上述3种阵列误差的综合影响,给出了一类基于辅助阵元的有源校正算法.首先,将3种阵列误差的综合影响等效为一种依赖方位变化的幅相误差,并通过一种基于辅助阵元的自校正方法得到了关于3种阵列误差的非线性最小二乘优化模型;然后,针对阵列误差矩阵可能出现的不同模型,给出了相应的求解算法;接着,针对算法的参数估计唯一性给出了较为细致的分析,并对算法做了进一步改进;最后,通过仿真实验验证了新算法的有效性.
The combined effects of array mutual coupling, amplitude and phase error and array element position error will seriously affect the performance of the super-resolution algorithm. Therefore, aiming at the combined effects of the above three array errors, a class of active Correction algorithm.Firstly, the combined effect of the three array errors is equivalent to a phase-error depending on the azimuth change, and a nonlinear minimum two-for-three array error is obtained by a self-calibration method based on the auxiliary array element Then the optimization algorithm is given based on the different models that the array error matrix may appear. Then, a more detailed analysis is given for the uniqueness of the parameter estimation of the algorithm, and the algorithm is further improved. Finally, The simulation results show the effectiveness of the new algorithm.