Performance of the Space-Time Block Coded DS-CDMA Uplink Employing Soft-Output ACO-Aided Multiuser Space-Time Detection and Iterative Decoding


Xu, Chong, El-Hajjar, Mohammed, Maunder, Robert G., Yang, Lie-Liang and Hanzo, Lajos (2010) Performance of the Space-Time Block Coded DS-CDMA Uplink Employing Soft-Output ACO-Aided Multiuser Space-Time Detection and Iterative Decoding At 2010 IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), Taiwan, Province of China. 16 - 19 May 2010. , pp. 1-5. (doi:10.1109/VETECS.2010.5493768).

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Description/Abstract

Abstract—In this treatise we propose a three-stage twin-transmit-antenna assisted MultiUser (MU) Direct Sequence Code-Division Mulitple Access (DS-CDMA) system employing both a Unitary Rate Code (URC) and a Recursive Systematic Code (RSC) to carry out iterative turbo detection. A Space-Time Block Code (STBC) is used to provide second-order diversity gain in conjunction with a novel soft-output (SO) ant-colony optimization (ACO) based space-time multiuser detection (ST/MUD) algorithm, which is capable of carrying out STBC decoding, while mitigating the MultiUser Interference (MUI) and generating the Log-Likelihood Ratios (LLR) for facilitating the iterative exchange of extrinsic informa- tion between the URC and RSC decoders of each user. With aid of the above mentioned state-of-the-art techniques, the proposed system becomes capable of approaching the performance of the single-user system within about 0.5dB, when K = 32 users are supported with the aid of 31-chip Gold-codes.

Item Type: Conference or Workshop Item (Paper)
Digital Object Identifier (DOI): doi:10.1109/VETECS.2010.5493768
Venue - Dates: 2010 IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), Taiwan, Province of China, 2010-05-16 - 2010-05-19
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Organisations: Southampton Wireless Group
ePrint ID: 271169
Date :
Date Event
May 2010Published
Date Deposited: 25 May 2010 21:22
Last Modified: 17 Apr 2017 18:21
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/271169

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