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Phase-only adaptive nulling with neural networks for antenna array synthesis

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4 Author(s)
Ghayoula, R. ; Lab. de Phys. de la Mater. molle, Campus Univ. Tunis El-manar, Tunis ; Fadlallah, N. ; Gharsallah, A. ; Rammal, M.

A new approach to adaptive phase-only nulling with phased arrays is described. An efficient method is presented to synthesise directive beam and multi-beam patterns and create adaptive nulls in interference direction. The proposed method is based on iterative minimisation of a function that incorporates constraints imposed in each direction with respect to excitation phases and neural network technique. Various results are presented to show the advantages and limitations of this approach. The back-propagation algorithm proves to be better than previous phase-only adaptive algorithms. To verify the performances of the proposed technique, an eight-element array has been realised and tested for various types of beam configurations.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:3 ,  Issue: 1 )

Date of Publication:

February 2009

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