A calibration method for position, gain and phase uncertainty of nonplanar array with arbitrary geometry

In this paper, a calibration method is proposed for a nonplanar array with arbitrary geometry. This method can estimate the errors of array sensor position, gain and phase simultaneously using known calibration sources. Note that the technique does not use iterative calculation in estimating the array parameters and hence it has no convergent problem. However, it requires that four directions of arrival (DOAs) of signal sources to be known to calibrate the array. Some representative computer simulations are presented to illustrate the improved performance in resolution and accuracy for multiple source localization problems using this technique.