Performance of a Decorrelator in Convolutionally Coded WCDMA Systems
Rapport, 2005

The objective of this paper is to study the performance of a linear multiuser detector (a decorrelator) in a convolutionally encoded wideband code-division multiple-access (WCDMA) system. The study, which is valid for a traditional detection scheme, where the decorrelator and the channel decoder work separately, shows that the single-user detector (the Rake receiver) performs better than the decorrelator at low signal-to-noise ratios (SNRs). The SNR range, in which the Rake receiver outperforms the decorrelator, is influenced by the error correction capability of the channel code and the load of the system. In particular, a WCDMA speech service is evaluated. Simulations show that the Rake receiver is superior to the decorrelator when targeting a required bit-error rate (BER) of 10^{-3}.

MAI

MUD

RSFQ

fixed-point implementation

WCDMA

SIC

Författare

Hongxia Zhao

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Tony Ottosson Gadd

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Erik Ström

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

1403-266X (ISSN)

Ämneskategorier

Annan elektroteknik och elektronik

R - Department of Signals and Systems, Chalmers University of Technology: R018/2005