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This paper deals with different beamforming techniques for DOA estimation. High resolution techniques such as Multiple Signal Classification (MUSIC) and Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT) which are subspace based techniques are also discussed. Finally, further resolution improvement is achieved through the use of directional sensors. The computational complexities of beamforming techniques are also compared. Index Terms—Beamforming, computations, direction-of-arrival, multiple, radar, resolution.

Comparison of Direction of Arrival (DOA) Estimation Techniques for Closely Spaced Targets