NDLI: Channel estimation for OFDM systems with multiple transmit antennas by exploiting the properties of the discrete Fourier transform

Content Provider	IEEE Xplore Digital Library
Author	Auer, G. Dammann, A. Sand, S.
Copyright Year	2003
Description	Author affiliation: DoCoMo Commun. Labs. Eur. GmbH, Munchen, Germany (Auer, G.; Dammann, A.)
Abstract	We addresses channel estimation based on the discrete Fourier transform (DFT) applied to OFDM-based MIMO systems. By exploiting the properties of the DFT, channel estimation schemes for MIMO-OFDM system can be simplified. The Fourier transform translates phase shifts in the frequency domain to delays in the time domain. In order to exploit this feature, phase shifted pilot sequences are a perfect match to the Fourier transform in terms of separating the N/sub T/ superimposed signals, corresponding to N/sub T/ transmit antennas, without any further processing. The proposed estimator is shown to be optimum for the sample spaced channel, i.e. the channel tap delays are multiples of the sampling duration. A sub-optimum approximation for the non-sample spaced channel is also suggested.
Sponsorship	IEEE Commun. Soc
Starting Page	1954
Ending Page	1958
File Size	406428
Page Count	5
File Format	PDF
ISBN	0780378229
DOI	10.1109/PIMRC.2003.1260459
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-07
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Channel estimation OFDM Transmitting antennas Discrete Fourier transforms Fourier transforms Delay estimation MIMO Frequency domain analysis Delay effects Signal processing
Content Type	Text
Resource Type	Article

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