Design of Smart Antenna Using Normalized Leaky LMS and Sign Leaky LMS Algorithms—A Comparative Study

Abstract

The main component used in the present day cellular network is an adaptive smart antenna, which with the help of a cell site transmit signal in a specific direction reduces undesired interference. In this paper, a sign leaky least mean square (SLLMS) algorithm and normalized leaky least mean square (NLLMS) algorithm is introduced for beam forming in smart antenna. A comparative study is done based on ability to generate main beam towards desire user, to generate null toward interferer, maximum side lobe level (SLL max ) and convergence by varying the signal-to-noise ratio (SNR).