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Proceedings of 2009 International Workshop on Information Security and Application (IWISA 2009)

Qingdao, China, November 21-22, 2009

Editors: Feng Gao and Xijun Zhu

AP Catalog Number: AP-PROC-CS-09CN004

ISBN: 978-952-5726-06-0

Page(s): 189-192

Low-complexity Detector for MIMO-OFDM Coded System

Lisheng Fan and Yongquan Jiang

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Abstract

This paper proposes an adaptive joint combination of the maximum likelihood detection (MLD) and MMSE detection with successive interference cancellation (MMSE-SIC) for MIMO-OFDM coded system. The coded system employs the linear convolutional code as the channel encoder, in order to deal with the severe fading. The cyclic redundancy check (CRC) is attached in the tail of the channel coder to detect whether there exists error in the detected information bits. To utilize the CRC function sufficiently, this paper proposes an adaptive joint combination of MLD and MMSE-SIC for the coded systems. The number of data streams to be detected by MLD is adaptively increased if the CRC finds some error in the detected information bits. This procedure ends when there is no error in the detected bits or the number of streams to be detected by MLD exceeds a predetermined threshold. Computer Simulation results show that the proposed scheme can achieve near-MLD performance with very low detection complexity.

Index Terms

MIMO-OFDM, CRC, low-complexity detector, MLD

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