NDLI: Iterative receivers for OFDM coded broadband MIMO fading channels

Content Provider	IEEE Xplore Digital Library
Author	Hui Liu Xiaodong Wang Zixiang Xiong
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA (Hui Liu)
Abstract	In this paper, we focus on the design of iterative receivers for OFDM coded systems in unknown broadband MIMO fading channels. The MIMO fading model is described by the environmental parameters such as mean angle of arrival, angular spread, antenna spacing, multiple clustered paths and Doppler shift. First, an expectation-maximization (EM)-based iterative receiver is presented for OFDM coded MIMO system without outer channel coding. The EM procedure is initialized by exploiting the time-domain correlation of the MIMO channels. When there is a mismatch on carrier frequency between the transmitter and receiver ends, which degrades the receiver performance, we also provide a scheme for frequency offset correction in MIMO systems. We further investigate a turbo-based EM receiver for OFDM coded MIMO system by adding interleaving and deinterleaving operators and outer channel coding. The receiver performance is proved to be greatly improved. For both systems, with and without outer channel coding, the performance degradation due to the spatial-domain correlation and/or frequency offset is presented in simulations.
Sponsorship	IEEE Signal Processing Soc
Starting Page	355
Ending Page	358
File Size	286279
Page Count	4
File Format	PDF
ISBN	0780379977
DOI	10.1109/SSP.2003.1289418
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM MIMO Fading Degradation Channel coding Scattering Time domain analysis Transmitters Bandwidth Receiving antennas
Content Type	Text
Resource Type	Article

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