Fast Convergence and Reduced Complexity Receiver Design for LDS-OFDM System

Wen, L., Razavi, R., Xiao, P. and Imran, M. A. (2015) Fast Convergence and Reduced Complexity Receiver Design for LDS-OFDM System. In: 2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC), Washington, DC, USA, 02-05 Sep 2014, pp. 918-922. ISBN 9781479949120 (doi:10.1109/PIMRC.2014.7136297)

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Abstract

Low density signature for OFDM (LDS-OFDM) is able to achieve satisfactory performance in overloaded conditions, but the existing LDS-OFDM has the drawback of slow convergence rate for multiuser detection (MUD) and high receiver complexity. To tackle these problems, we propose a serial schedule for the iterative MUD. By doing so, the convergence rate of MUD is accelerated and the detection iterations can be decreased. Furthermore, in order to exploit the similar sparse structure of LDS-OFDM and LDPC code, we utilize LDPC codes for LDS-OFDM system. Simulations show that compared with existing LDS-OFDM, the LDPC code improves the system performance.

Item Type:Conference Proceedings
Additional Information:This work was supported by the UK Engineering and Physical Science Research Council (EPSRC) under grant number EP/J017655/1 and the fifth generation (5G) project.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Wen, L., Razavi, R., Xiao, P., and Imran, M. A.
College/School:College of Science and Engineering > School of Engineering
ISBN:9781479949120
Copyright Holders:Copyright © 2015 IEEE
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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