Broad Null Steering by Phase only Perturbation Using Immune Algorithm

Abstract:

Investigations on broad null steering by only phase perturbation are presented in this paper using immune algorithm (IA) for linear array. Broad null steering in antenna pattern helps to reduce channel interference due to less energy being transmitted at unwanted directions. Phase controlling for broad null steering is relative easy realizing comparing with amplitude or elements’ position controlling. IA is an efficient approach to escape from local convergency for muti-objective optimization with the antibody colony’s diversity is enhanced by using Logistic mapping for initial colony and Gauss function for mutation operator. In this paper, excitation phases are setted as antibodies optimizing for steering broad nulls with specified width at specified directions. Well simulation results show the availability of broad nulling by phase only controlling and the superior global search capability of the improved IA.

• Periodical: Applied Mechanics and Materials (Volumes 321-324)
• Pages: 2749-2753
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.321-324.2749
• Online since: June 2013
• Authors: Jian Feng Ye, Yu Feng Wang
• Keywords: Broad Null, Immue Algorithm, Pattern Synthesis, Phased only

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