考虑信源方位误差的阵元位置误差校正

Calibration for Position Errors of Array Elements under Location Errors of Signal Source

针对信源方位信息存在偏差时阵元位置误差进行讨论,提出了一种基于单信源的误差校正方法。该方法中假设接收阵列可精密旋转,达到多个信源分时校正的效果,从而获得大量样本,先用最小二乘拟合法对校正源的方位信息进行估计,再采用剔野的方式剔除某些阵元位置误差较大的数据,达到校正信源方位信息的目的,然后再次采用最小二乘法校正阵元位置误差,最后仿真验证了该方法的有效性,并对比分析了阵元位置误差校正前后的MUSIC谱测角。

The position errors of array elements are discussed while the location of signal source has a deviation. A calibration method is proposed based on the single source and the antenna arrays that are able to rotate accurately. Plenty of samples can he got from those arrays, and the time-sharing calibration effect of multiple sources can be achieved. Firstly, the least square fitting method is used to calibrate source location by removing samples whose fitting error is too large. Then the position errors of array elements are calibrated by using least square method again. At last, the computer simulation demonstrates that the algorithm is ef- fective and practical, and the angles which are measured by using MUSIC spectrum before and after calibra- tion are comoared.