Performance Analysis of Self-Calibration Algorithm for L-shaped Array

A self-calibration algorithm (SAL: self-calibration algorithm for L-shaped array) is presented for L-shaped array in the presence of mutual coupling. The proposed algorithm utilizes special mutual coupling characteristic of L-shaped array to decouple the signal source information (DOA) and coupling coefficients of antenna array so that two kinds of parameter estimations can be realized without any calibration sources. This literature puts emphasis on the performance analysis of new proposed algorithm in the presence of unknown mutual coupling. Simulation results demonstrate that the proposed self-calibration algorithm can achieve the high resolution under the condition of unknown coupling. Meanthile, it possesses a better performance when SNR is larger than 15 dB and snapshot is larger than 150, which mean the estimation of coupling matrix is close to the true value.