ARRAY APERTURE EXTENSION ALGORITHM FOR 2-D DOA ESTIMATION WITH L-SHAPED ARRAY
Xi Nie, Ping Wei · Progress In Electromagnetics Research Letters · 2015
In this paper, an array aperture extension algorithm is developed for two-dimensional (2-D) direction-of-arrival (DOA) estimation with L-shaped array. We enlarge the dimension of the covariance matrix by using the rotational invariance in conjunction with the property that the signal covariance matrix is real diagonal matrix. Estimation of DOAs is performed by processing this larger dimensional matrix. The simulation results indicate that our method can improve the DOA estimation accuracy.