Performance analysis of self-calibration algorithm for Y-shaped array in the presence of mutual coupling

摘要

A self-calibration algorithm for Y-shaped array (SAY) is presented in the presence of mutual coupling. It utilizes special mutual coupling characteristics of Yshaped array to decouple the azimuth (AZ)/elevation (EL) and mutual coupling coefficients of antenna array so that two kinds of parameter estimations can be realized without any calibration sources. Different from conventional self-calibration algorithm based on iterative alternating minimization technique, the proposed algorithm firstly estimates DOA by searching spectrum peak, and then estimates mutual coupling coefficients so as to avoid huge computation and global convergence problem. This literature puts emphasis on the performance analysis of new proposed algorithm. Simulation results illustrate that the proposed self-calibration algorithm has the advantages of better numerical stability and less computation load. Besides, it possesses a better performance when SNR is larger than 20dB and the number of snapshots is larger than 150.