Multi-path Adaptive Interference Cancellation Technology Based on LMS Algorithm

Abstract

In order to solve the problem of signal multipath propagationa, a multi-path adaptive interference cancellation model using LMS algorithm is given. The formula is calculated first, the theory of cancellation of multipath interference signals is analyzed. The system does not need the information of the input signal at the previous moment, and continuously updates the weights through an iterative algorithm, making the cancellation performance superior in a time-varying environment. Simulation results show that the cancellation ability of the system to multipath interference signals is not very significant. Through analysis, it is found that phase difference angle between two signals leads to the degradation of multipath propagation interference signal cancellation performance. so, urgent need to find a method of compensating the phase difference angle to deal with the cancellation performance of the multipath propagation interference signal.