Research on adaptive filter of Orthogonal Frequency Division Multiplexing Signals Based on LMS Algorithm

Abstract

This research focuses on processing signals in orthogonal frequency division multiplexing (OFDM) systems, especially adaptive filter techniques for multipath effects and noise interference. By deeply discussing the application of the LMS algorithm in the OFDM system, this paper proposes an adaptive filter scheme founded upon the LMS algorithm, which adaptively changes filter parameters to increase signal transmission efficiency and speed. The principles of the LMS algorithm and that of the adaptive filter, as well as the applicability and performance of the filter in the OFDM system, are analyzed and studied. Simulation experiments are conducted by MATLAB for the purpose of verifying the efficiency of the proposed scheme in reducing signal interference and improving system performance. The results indicate adaptive filter technology founded upon LMS algorithm has a wide application prospect in OFDM system, and plays a strong support for the development of wireless communication technology.