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Time-Domain Estimation of Time-Varying Channels in OFDM Systems

Shaoping CHEN, Guangfa DAI, Wengui RAO

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Summary :

This letter deals with the time-domain estimation of time-varying channels in orthogonal frequency-division multiplexing (OFDM) systems. The general complex exponential basis expansion model (GCE-BEM) is used to capture the time variation of the channel within an OFDM block. The design criterion of optimal training for OFDM systems in time-varying channels is derived. This optimal training enables the complete elimination of the interference from data symbols and minimizes the noise effect on channel estimation. The design criterion can be used for both pilot symbol aided modulation (PASM) and superimposed training OFDM systems over time-varying channels.

Publication
IEICE TRANSACTIONS on Communications Vol.E93-B No.1 pp.154-157
Publication Date
2010/01/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E93.B.154
Type of Manuscript
LETTER
Category
Transmission Systems and Transmission Equipment for Communications

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