Efficient combined fuzzy logic and LMS algorithm for smart antenna

Mohammed Hussein Miry (University of Technology- Iraq, Baghdad, Iraq)
Ali Hussien Mary (University of Baghdad, Baghdad, Iraq)

TELKOMNIKA (Telecommunication Computing Electronics and Control)
Vol 21, No 5: October 2023

The smart antennas are broadly used in wireless communication. The least mean square (LMS) algorithm is a procedure that is concerned in controlling the smart antenna pattern to accommodate specified requirements such as steering the beam toward the desired signal, in addition to placing the deep nulls in the direction of unwanted signals. The conventional LMS (C-LMS) has some drawbacks like slow convergence speed besides high steady state fluctuation error. To overcome these shortcomings, the present paper adopts an adaptive fuzzy control step size least mean square (FC-LMS) algorithm to adjust its step size. Computer simulation outcomes illustrate that the given model has fast convergence rate as well as low mean square error steady state.