Bayesian decision feedback equalizer

Abstract

Bayesian is an elegant solution which is applied for digital communication channel equalization, especially decision feedback equalizer. This is an extension to the maximum a posteriori probability symbol-decision equalizer to include decision feedback. By using MatLab to simulate the Bayesian Transversal Equalizer (BTE) and Bayesian Decision Feedback Equalizer BDFE), this paper shows how better BDFE compares to BTE, also the advantages of Bayesian solution comparing to other method to solve the channel equalization. A scheme of utilizing decision feedback is proposed which not only improves equalization performance but also reduces computational complexity dramatically. With the given data and simple formulas, Bayesian solution brings more the high speed and accuracy in calculation than some other solutions.