An Improved Direction of Arrival Technique Based on Nullforming and Steering Theory
Firas Slewa Dawod, Sayan Kumar Roy · 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI) · 2022
In this paper, a new technique is introduced for finding direction of arrival (DoA) of an incident signal based on the nullforming and steering theory. On the contrary to the operation of beamforming, the proposed method creates a deep and precise null that is then steered toward all the possible directions to estimate the minimum power that indicates the direction of the incident signal. Additionally, this new method can outperform conventional beamforming as the resulted null is much narrower than conventional beams. The proposed null-forming and steering theory has been proven successfully by both analytical and simulation validation using MATLAB Simulink model and an integrated software defined radio USRP N200.