IEICE Transactions on Communications
Online ISSN : 1745-1345
Print ISSN : 0916-8516
Regular Section
Time-Domain Estimation of Time-Varying Channels in OFDM Systems
Shaoping CHENGuangfa DAIWengui RAO
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2010 Volume E93.B Issue 1 Pages 154-157

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Abstract

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.

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© 2010 The Institute of Electronics, Information and Communication Engineers
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