Sensor Position Errors Calibration Algorithm of Near-field Source Based on Fourth-order Cumulant

Aiming at the problem of array position error calibration under near-field source conditions, a method based on fourth-order cumulant is proposed. Decoupling of azimuth, range and array position error is achieved by vector reconstruction, the rotation invariance of the fourth-order cumulant constructed and transformation of array steering vectors. At the same time, the position error is calibrated in a time-sharing manner by using multiple signal sources at different positions. But this method does not require a precisely known auxiliary source. The simulation results show that the proposed algorithm has less computational complexity, more accurate azimuth and range parameters estimation, and higher accuracy of position error calibration.