Abstract:

Processing the signals received on an array of sensors for localization of multiple emitters is of great interest. However, the common array gain/phase errors will severely affect the estimation performance of direction finding algorithms. In this paper, a self-calibration method of gain/phase errors based on linear transformation is proposed. Both the gain/phase coefficients and direction of arrival (DOA) can be estimated effectively by a sequence of processes including applying a group of instrumental sensors with consistent gain/phase performance, converting and deriving the matrix by using the orthogonal linear transformation as well as combining the least squares method. The proposed algorithm is able to self-calibrate the array gain/phase errors without spectral searching and matrix decomposition, there it is low in computational load and complexity. Furthermore, the computer simulation results verify the effectiveness and superiority of the algorithm.