Novel Auto-CalibrationMethod for 7-elements Hexagonal Array with Mutual Coupling

摘要

Mutual coupling between antenna array elements will significantlydegrade the performance of the array signal processing methods.Due to the Toeplitz structure of mutual coupling matrix (MCM), there existsome mutual coupling calibration algorithms for the uniform linear array(ULA) or uniform circular array (UCA). But few methods for other arrays.In this letter, we derive a new transformation formula for theMCMof the 7-elements hexagonal array (HA-7). Further, we extend two mutual couplingauto-calibration methods from UCA to HA by the transformation formula.Simulation results demonstrate the validity of the proposed two methods.