Interference suppression by optimising the positions of selected elements using generalised pattern search algorithm

F. Tokan; F. Güneş

Interference suppression by optimising the positions of selected elements using generalised pattern search algorithm

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Interference suppression by optimising the positions of selected elements using generalised pattern search algorithm

Author(s): F. Tokan and F. Güneş
DOI: 10.1049/iet-map.2009.0374

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Author(s): F. Tokan ¹ and F. Güneş ¹
- Affiliations: 1: Faculty of Electrics and Electronics, Department of Electronics and Communication Engineering, Yıldız Technical University, Istanbul, Turkey
Source: Volume 5, Issue 2, 31 January 2011, p. 127 – 135
DOI: 10.1049/iet-map.2009.0374 , Print ISSN 1751-8725, Online ISSN 1751-8733

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We propose the generalised pattern search (GPS) optimisation algorithm for steering nulls in the directions of interference. This algorithm is a deterministic, fast and efficient derivative-free optimisation process searching for function minima. A new technique based on step amplitudes for excitations of array elements is used as the template. In order to reduce the complexity and cost, only the positions of selected elements of the array are optimised for suppression of narrow or wide interferences by the GPS algorithm. The results show that the GPS algorithm is an efficient and robust technique in imposing single null, multiple nulls or wide suppressed sectors by perturbating only the selected few array elements while the other elements freeze. Furthermore, the full-wave simulations of the synthesised arrays are also completed to examine the effects of mutual coupling on the radiation patterns.

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Interference suppression by optimising the positions of selected elements using generalised pattern search algorithm

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