Improved CSE with DLS-MMSE Criteria in TH-UWB System

This article presents a study on the use of deterministic least squares criteria combined with the minimum mean square error method for the purpose of computing filter coefficients of the channel shortening equalizer. This method is well known to alleviate inter-symbol interference in time hopping UWB systems. The validity of this method is applied to shorten the impulse response of the effective UWB channels and, therefore, reduce the complexity of the rake receiver. Results show a very promising advantage compared to partialrake (P-Rake), selective-rake (S-Rake) and optimal maximum shortening signal-to-noise ratio methods. Keywords—channel shortening equalizer, inter-symbols interference, rake receiver, time hopping, ultra-wide-band, ZF-MMSE.