2-D DOA Estimation for Uniform Circular Arrays with PM
Xiaohua Lian, Jianjiang Zhou · 2006
This paper introduces the propagator method (PM) to 2-D direction of arrival (DOA) estimation for uniform circular arrays (UCA). Two kinds of PM are presented, PM-ESPRIT and PM-MUSIC. Both operate in beamspace and require no eigen-decomposition calculation, therefore reduce the computational load significantly. PM-ESPRIT, which has natural pair matching structure, can provide accurate searching starts for PM-MUSIC, after introducing a new random process with zero mean. PM-MUSIC, based on real-valued beamspace manifold, achieves high resolution in 2-D DOA estimation for incoherent signal sources and has a better performance in dealing with the highly coherent sources than UCA-RB-MUSIC.