DOA estimation and self-calibration algorithm for multiple subarrays in the presence of mutual coupling
C. Qi, Z. Chen, Y. Zhang, Y. Wang · IEE Proceedings - Radar Sonar and Navigation · 2006
A computationally efficient algorithm is herein proposed for estimation of the direction of arrival (DOA) of uncorrelated sources and for self-calibration of mutual coupling among sensors constituting several subarrays, with each subarray internally uniformly spaced. These subarrays may differ in size but are identical in the orientation of their subarray-axes. Mutual coupling is herein modelled as independent of the incident sources. DOA identifiability is also investigated. Simulation results illustrate that the new algorithm possesses high resolution, low computational complexity and better accuracy of self-calibration.