A NOVEL NULL-STEERING BEAMFORMER BASED ON BAT ALGORITHM

Abstract

In this study, a null-steering beamformer for interference suppression of
half-wave Dipole Uniformly Spaced Linear Array (DULA) has been proposed.
The proposed beamformer has utilized BAT algorithm (BA) and the complex
weight (both the amplitude and the phase) control of each array element. In
order to verify the proposal, a number of scenarios of DULA pattern imposing
the pre-set nulls have been carried out considering the mutual coupling
among array elements. The proposed beamformer has demonstrated the
capability to place with precision single, multiple, and broad nulls at arbitrary
interference directions, suppress side lobes, and maintain a predefined
beamwidth in the presence of mutual coupling.