Mirrored Arrays for Direction-of-Arrival Estimation

A mirrored array configuration, which consists of an ordinary linear array and a reflector, is proposed. The mirrored arrays can provide composable degrees of freedom (DOF) for array processing by combined measurements with the help of mechanical adjustment (e.g., movement or rotation). This composability naturally leads to DOF enhancement and facilitates its applications in direction-of-arrival (DOA) estimation. The feasibility and effectiveness of the proposed arrays are demonstrated through numerical analysis.