Direction finding using sparse array composed of multiple identical subarrays

This paper addresses the problem of determining the directions-of-arrival (DOA's) of narrow-band emitter signals impinging on a sparse sensor array. We assume that array incorporates several identical widely separated subarrays. A TLS-ESPRIT-based DOA estimator is obtained for this class of sparse sensor arrays. The generalization of the TLS-ESPRIT that includes structure (row) weighting method is discussed. Simulation results are included to show the performance of proposed estimator.