Radiation pattern synthesis using a chaotic beamforming algorithm

• Published in: Compel Vol. 35; no. 5; pp. 1814 - 1829
• Main Authors: Jovanović, Ana, Lazović, Luka, Rubežić, Vesna
• Format: Journal Article
• Language: English
• Published: Bradford Emerald Group Publishing Limited 05.09.2016
• Subjects: Adaptation; Adaptive algorithms; Algorithms; Angle of arrival; Antenna arrays; Antenna radiation patterns; Arrays; Beamforming; Chaos theory; Fitness; Optimization algorithms; Quadratic programming; Radiation; Sidelobe reduction; Sidelobes; Synthesis; Variables; LMS VSS; LMS; Adaptive techniques; Chaos theory; Antenna
• ISSN: 0332-1649; 2054-5606
• DOI: 10.1108/COMPEL-08-2015-0299

Purpose The purpose of this paper is to use the proposed algorithm for the fast adaptation of the antenna array radiation pattern on the particular scenario of the incoming signals. The fitness function to be minimized includes the precise estimation of signals’ arrival angles, setting the deep nulls in the directions of the interfering signal, the reduction of the main lobe’s width and the reduction of side lobes. Design/methodology/approach Unlike conventional adaptive algorithms, the proposed algorithm allows synthesis of radiation patterns in the case of a larger number of incident desired and interfering signals. The proposed method also reduces the width of the dead zone. Findings In this paper a comparison of the results obtained from the chaotic beamforming algorithm with the results obtained by using the Sequential Quadratic Programming method is presented. Originality/value The chaotic beamforming algorithm is proposed here. It is based on the optimization of the least mean square and on the variable step-size least mean square algorithms, using chaos theory for synthesis of the radiation pattern of the linear antenna array.