基于辅助阵元的阵列误差有源校正算法

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.

Array errors active calibration algorithm based on instrumental sensors

The array mutual coupling, gain-phase errors and sensor position errors would significantly degrade the performance of high-resolution direction of arrival (DOA) estimation algorithms. Aiming at the combined influences of the above three array errors, a kind of active calibration algorithm is presented with the help of instrumental sensors in this paper. Firstly, the integrated effects of the three array errors are shown to be equivalent to angularly dependent gain-phase errors. Then, a non-linear least squ...