A Cordic based equalizer for multiuser detection in WCDMA systems

Abstract

Future terminals for CDMA will have to employ multiuser detection to implement high data rate modes such as HSDPA in the UTRA/3GPP standard. Therefore efficient and flexible detection algorithms are needed. In B. Heyne et al, (2003) we have already shown an approach of such an equalizer for single user detection. The principle algorithm of this equalizer has now been extended to a multiuser detector, which can make use of the same Cordic based platform as the original equalizer. The paper shows that our approach has got a significant performance increase in comparison to a standard Rake based equalizer, whereas the computational complexity remains roughly the same.