Robustness D 3 LS beamforming algorithm against the uncertainties in a uniform linear array radar of dipole antenna

• Published in: International journal of communication systems 2021-03, Vol.34 (4)
• Main Authors: Zarezadeh, Esmail, Ghorbani, Ayaz
• Format: Article
• Language: English
• ISSN: 1074-5351; 1099-1131
• DOI: 10.1002/dac.4664

In practical terms, direct data domain least squares (D 3 LS) beamforming algorithm performance is severely decreased by the array steering vector uncertainty. In this paper, we investigate the performance of D 3 LS approach for beamforming. Uniform linear antenna array radar of dipole antenna is considered in the presence of mutual coupling between the elements of the array. The performance of D 3 LS beamforming algorithm is severely affected by uncertainty caused by mutual coupling. In order to test the robustness of the D 3 LS approach against uncertainty, a quadratic inequality constraint is considered to optimize weight vector of D 3 LS beamforming algorithm. The convex optimization method is used to calculate optimized weight vector. The proposed convex optimization problem is solved by barrier method. It is a subset of Interior‐point numerical analysis methods. Several different scenarios are used to evaluate the proposed algorithm in MATLAB.