IFKSA-ESPRIT - Estimating the Direction of Arrival under the Element Failures in a Uniform Linear Antenna Array

This paper presents the use of Inverse Free Krylov Subspace Algorithm (IFKSA) with Estimation of Signal Parameters via Rotational Invariance Technique (ESPRIT) for the Direction-of-Arrival (DOA) estimation under element failure in a Uniform Linear Antenna Array (ULA). Failure of a few elements results in sparse signal space. IFKSA algorithm is an iterative algorithm to find the dominant eigenvalues and is applied for decomposition of sparse signal space, into signal subspace and the noise subspace. The ESPRIT is later used to estimate the DOAs. The performance of the algorithm is evaluated for various elements failure scenarios and noise levels, and the results are compared with ESPRIT and Cramer Rao Lower bound (CRLB). The results indicate a better performance of the IFKSA-ESPRIT based DOA estimation scheme under different antenna failure scenarios, and noise levels. Index Term s— Inverse Free Krylov Subspace, ESPRIT, Direction-of-Arrival.