Abstract
Abstract In this paper, the performance analysis of a novel normalized leaky variable step size algorithm for smart antennas is presented. Uniform linear array antenna of 8-, 12-, 16-, and 32-element geometric configurations with various interelement spacing is used as experimental setups. The proposed algorithm improves the convergence rate and mitigates the interference effects by producing deeper nulls in the respective direction of interferences. To analyze the behavior of algorithms, interelement spacing is varied in comparison with variable step size LMS and leaky LMS algorithms. It is observed that varying the distance between the antenna elements produces deviations in the placement of nulls which cannot cancel out the interfering signals in the existing algorithms. No deviations are observed for the proposed method. This is most suitable for smart antenna application.KeywordsAdaptive beamforming algorithmSmart antennaUniform linear arrayDeeper nullsConvergence rate
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