Smart Antenna Beamforming using LMS Adaptive Filter Algorithm

Adaptive filters are novel kind of filters used in Digital Signal Processing with adjustable weights. The weight adjustment in adaptive filters is done using some special kind of algorithms called as adaptive algorithms. Adaptive filters have a number of applications in various fields like signal processing, communication systems biomedical etc. One of the novel applications of Adaptive filters is in Smart Antenna Beam formation. Smart antenna is an antenna system used in wireless communication, with array of antenna elements having adjustable weights. By optimizing or adjusting the weights of adaptive antenna array the beam of antenna can be directed towards desired users and a null of beam can be placed toward undesired users thus enhancing the capacity of the system. The adjustment of weights is carried out using Adaptive Filter algorithms. In this paper, we have used LMS algorithm for beam formation in smart antenna. Keywords— Smart antenna, LMS algorithm, beamformation, adaptive algorithms