Variable step adaptive equalizer for digital mobile radio

Abstract

In a digital mobile radio system, an adaptive equalizer is introduced at the receiver to remove the effect of intersymbol interference. The digital mobile radio signal system requires a fast converging adaptive equalizer algorithm. The well-known conventional LMS algorithm has proven to be incapable of handling such environment. Thus, this has led into studies on other faster and more complex algorithms such as RLS and Kalman algorithm. Another alternative to these algorithms is analyzed namely the variable step LMS (VSLMS) algorithm. The performance of the VSLMS algorithm, which is based on the LMS algorithm with variable step size, is studied under a digital mobile environment. Simulation results are also presented to prove the superiority of the performance of the VSLMS algorithm compared to the LMS algorithm.<>