The University of Southampton
University of Southampton Institutional Repository

# Receiver Multiuser Diversity Aided Multi-Stage MMSE Multiuser Detection: A Low-Complexity Detector Fast-Converging to the Optimum

Yang, Lie-Liang (2010) Receiver Multiuser Diversity Aided Multi-Stage MMSE Multiuser Detection: A Low-Complexity Detector Fast-Converging to the Optimum. IEEE VTC2010 Spring, Taiwan. 16 - 19 May 2010.

Record type: Conference or Workshop Item (Paper)

## Abstract

Design of low-complexity detection schemes that can approach near-optimum bit error rate (BER) performance in multiuser or other multiple-input multiple-output (MIMO) systems has always been highly challenging. In this paper we propose and investigate a so-called receiver multiuser diversity aided multi-stage minimum mean-square error multiuser detection (RMD/MS-MMSE MUD) scheme operated in the principles of successive interference cancellation (SIC). The BER performance of the RMD/MS-MMSE MUD is investigated in association with both the direct-sequence code-division multiple-access (DS-CDMA) communicating over both Gaussian and Rayleigh fading channels, and the space-division multiple-access (SDMA) communicating over Rayleigh fading channels. Furthermore, we assume that the DS-CDMA and SDMA systems are either full-load or overload. Our studies show that the RMD/MS-MMSE MUD in full-load cases is capable of converging to the optimum BER performance of the maximum likelihood (ML) multiuser detector (MUD). For the overload systems, the RMD/MS-MMSE MUD can make a DS-CDMA or SDMA system support K=2N users, but still achieve much better BER performance than a corresponding DS-CDMA or SDMA system using the conventional MMSE-MUD to support K=N users, where $N$ denotes the spreading factor of DS-CDMA or the number of receive antennas of SDMA.

Text
05493921.pdf - Version of Record

Published date: May 2010
Additional Information: Event Dates: 16-19 May 2010
Venue - Dates: IEEE VTC2010 Spring, Taiwan, 2010-05-16 - 2010-05-19
Organisations: Southampton Wireless Group

## Identifiers

Local EPrints ID: 272636
URI: http://eprints.soton.ac.uk/id/eprint/272636
PURE UUID: a3934218-ece2-443a-b880-ca420bf6b4de
ORCID for Lie-Liang Yang: orcid.org/0000-0002-2032-9327

## Catalogue record

Date deposited: 05 Aug 2011 16:32