Robust Direction-of-Arrival Estimation using Array Feedback Beamforming in Low SNR Scenarios

A new spatial IIR beamformer based direction-of-arrival (DoA) estimation method is proposed in this paper. We propose a retransmission feedback for an array of transmit and receive antennas that improves the performance parameters viz. half-power beamwidth (HPBW), side-lobe suppression, directivity. Through quantitative comparison we show our approach out-performs previous beamforming with single antenna, conventional beamformer. then incorporate minimum variance distortionless response (MVDR) setup. two approaches, one superior terms lower error, use as DoA method. compare Multiple Signal Classification (MUSIC), Estimation Parameters using Rotation Invariant Technique (ESPRIT), robust MVDR, nested-array reduced-dimension MVDR methods. The results at SNR levels -60 dB to -10 dB, angle estiation error 20° less compared prior