Eigenstructure-based Estimation of Directions of Arrival of Signalsm with Rectangular Sparse Array

Sparse arrays are attractive for wide range applications such as radar, sonar, wireless communications. This paper addresses the problem of determining the directions-of-arrival (DOA's) of narrow-band emitter signals impinging on a rectangular sparse array. The array incorporates several identical widely separated subarrays. Unitary ESPRIT - based DOA estimator is obtained for this class of sparse sensor arrays. Simulation results are included to show the performance of proposed estimator