Gradient‐projection based super‐resolution wideband DOA estimation using non‐uniform linear arrays

A new method is developed for the Direction of Arrival (DOA) estimation wideband sources by refining initial estimates and posing super-resolution theory in a non-convex optimization problem. gradient-projection conducted accurate DOAs. The proposed can be performed any non-uniform linear array with no need focusing matrices. Moreover, greedy search algorithm employed to obtain implementation. Numerical simulations show outstanding accuracy more robustness noise compared some well-known methods. It also effective DOA adjacent sources.