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Least Squares Adaptive Algorithms Suitable for Multiplierless LMMSE Detection in 3rd Generation Mobile Systems

Litchfield, C. and Langley, Richard J. and Lee, Peter and Batchelor, John C. (2005) Least Squares Adaptive Algorithms Suitable for Multiplierless LMMSE Detection in 3rd Generation Mobile Systems. In: 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications. IEEE, pp. 1039-1044. ISBN 978-3-8007-2909-8. (doi:10.1109/PIMRC.2005.1651599) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:8906)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
http://dx.doi.org/10.1109/PIMRC.2005.1651599

Abstract

This paper presents an evaluation of a simple adaptive FIR filter structure using a hybrid-logarithmic number system (H-LNS) to minimize the complexity of a decentralized LMMSE receiver in the WCDMA downlink. Non-linear arithmetic operations can be executed efficiently with the H-LNS architecture without the necessity of fixed or floating point array multiplications. The use of signed-LMS adaptive algorithms are included in this study since this significantly reduces the number of MAC operations required for conversion to and from the logarithmic domain. The multiplierless receiver has been simulated in Matlabreg for the WCDMA-FDD downlink with macrodiversity, where the mantissa for each fractional logarithmic number was limited to 4,6 and 8 binary address bits. The results indicate that the hybrid-logarithmic signed-LMS implementations are practical for slow fading channels, where the use of log-antilog conversion with small look up tables is feasible with only minimal reduction in the signal to noise ratio

Item Type: Book section
DOI/Identification number: 10.1109/PIMRC.2005.1651599
Uncontrolled keywords: least squares methods; adaptive algorithm; arithmetic; finite impulse response filter; fading; downlink; signal to noise ratio; RAKE receivers; detectors; multiple access interference
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK5101 Telecommunications
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Yiqing Liang
Date Deposited: 15 Aug 2009 17:55 UTC
Last Modified: 16 Nov 2021 09:46 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/8906 (The current URI for this page, for reference purposes)

University of Kent Author Information

Lee, Peter.

Creator's ORCID:
CReDIT Contributor Roles:

Batchelor, John C..

Creator's ORCID: https://orcid.org/0000-0002-5139-5765
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