The University of Southampton
University of Southampton Institutional Repository

Semi-Blind and Group-Blind Multiuser Detection for the MC-CDMA Uplink

Semi-Blind and Group-Blind Multiuser Detection for the MC-CDMA Uplink
Semi-Blind and Group-Blind Multiuser Detection for the MC-CDMA Uplink
In this contribution both semi-blind and group blind multiuser detectors designed for uplink MCCDMA systems are investigated in conjunction with different spreading codes. In the investigated scenario Walsh codes are shown to outperform both Gold codes and Zadoff-Chu codes. A short cyclic prefix, rather than differential coding, isused for removing the phase ambiguity imposed by the blind channel estimation scheme, and the Akaike information theoretic criterion advocated by Wax and Kailath is invoked for the estimation of the rank of the semi-blind detectors, which is defined as the number of users activated in the channel. When supporting a total of K = 10 users and exploiting the knowledge of the signature waveforms for the group of K = 7 users communicating within the reference cell considered, while dispensing with any knowledge about the parameters of the remaining K - K = 3 users roaming in the surrounding cells, the system's performance was found to be close to that achieved with the aid of perfect knowledge of all the signature waveforms, the channel coefficients and the total number of users K supported. The achievable performance of this scenario was about 3dB from the single user performance at a BER of 10-3.
1727-1731
Wei, H.
c99f7f91-cfea-4292-8f88-6b184ff81446
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Wei, H.
c99f7f91-cfea-4292-8f88-6b184ff81446
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Wei, H. and Hanzo, L. (2004) Semi-Blind and Group-Blind Multiuser Detection for the MC-CDMA Uplink. IEEE VTC'04 (Spring), Milan, Italy. 17 - 19 May 2004. pp. 1727-1731 .

Record type: Conference or Workshop Item (Paper)

Abstract

In this contribution both semi-blind and group blind multiuser detectors designed for uplink MCCDMA systems are investigated in conjunction with different spreading codes. In the investigated scenario Walsh codes are shown to outperform both Gold codes and Zadoff-Chu codes. A short cyclic prefix, rather than differential coding, isused for removing the phase ambiguity imposed by the blind channel estimation scheme, and the Akaike information theoretic criterion advocated by Wax and Kailath is invoked for the estimation of the rank of the semi-blind detectors, which is defined as the number of users activated in the channel. When supporting a total of K = 10 users and exploiting the knowledge of the signature waveforms for the group of K = 7 users communicating within the reference cell considered, while dispensing with any knowledge about the parameters of the remaining K - K = 3 users roaming in the surrounding cells, the system's performance was found to be close to that achieved with the aid of perfect knowledge of all the signature waveforms, the channel coefficients and the total number of users K supported. The achievable performance of this scenario was about 3dB from the single user performance at a BER of 10-3.

Text
hw-lh-vtc04spring1.pdf - Other
Download (343kB)

More information

Published date: 2004
Additional Information: Event Dates: 17-19 May 2004
Venue - Dates: IEEE VTC'04 (Spring), Milan, Italy, 2004-05-17 - 2004-05-19
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 260302
URI: http://eprints.soton.ac.uk/id/eprint/260302
PURE UUID: 3c26cda5-3c01-4734-837e-480364680fc0
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 19 Jan 2005
Last modified: 18 Mar 2024 02:33

Export record

Contributors

Author: H. Wei
Author: L. Hanzo ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×