Publication Details

This article was originally published as: Raad, W, Burnett, I & Raad, I, A variable length linear array for smart antenna systems, 2nd International Conference on Information and Communication Technologies 2006 (ICTTA '06), 24-28 April 2006, 2, 2213-2217. Copyright 2006 IEEE.


Adaptive Arrays have been used extensively in wireless communications applications to reduce interference between desired users and interfering signals. In particular a large concentration of research has been directed to the Uniform Linear Array (ULA). However in most situations presented the authors utilise a fixed array length. In a mobile environment this has the disadvantage of producing a fixed beamwidth due to the fixed array length. This paper proposes an algorithm which can be used to determine the required beamwidth for a number of incoming signals by altering the length a specified number of elements present in an antenna array. This is achieved by the difference in the arrival angle of the desired user and a range incoming interferers known having a varied angle spread. The Least Mean Square (LMS) algorithm is incorporated into the algorithm for optimisation of the radiation pattern.



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