Computationally Efficient Near-Field Source Localization Using Single Snapshot

Abstract

Passive source localization of sources in Fresnel region (near-field) of the antenna array involves joint estimation of its direction-of-arrival (DOA) and range. This paper proposes a computationally efficient and simple fitness function for nearfield source localization by an arbitrary array using single snapshot. The DOA and range of the near field are estimated by optimizing the fitness function using particle swarm optimization. Simulation results show that the proposed method has better performance compared to maximum likelihood estimation method.