A Generalized ESPRIT Approach to Direction-of-Arrival Estimation

Abstract—A new spectral search-based direction-of-arrival (DOA) estimation method is proposed that extends the idea of the conventional ESPRIT DOA estimator to a much more general class of array geometries than assumed by the conventional ESPRIT technique. A computationally efficient polynomial rooting-based search-free implementation of the proposed algorithm is also developed. Index Terms—DOA estimation, generalized ESPRIT. I