A Wireless Receiver Design for DS-UWB System

摘要

In this paper, a robust adaptive MMSE Rake-equalizer receiver scheme is presented with channel estimation that has been transmitted in Direct Sequence-Ultra Wideband (DS-UWB) system. The Rake receiver is known as a technique that can effectively combine paths with different delays and obtain the path diversity gain. The proposed receiver structure reduces intense multi-path destruction and severe inter-symbol interference (ISI) by using a combined adaptive Rake and equalizer structure referred to as the minimum mean square error (MMSE) algorithm. Channel information is obtained through the using of a least mean square (LMS) adaptive algorithm on the training sequence of a preamble. Simulation results show that the new scheme employing the energy of a few paths to obtain better performance than the traditional maximum ratio combining (MRC) Rake receiver.