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Joint Carrier Fequency Synchronization and Channel Estimation for OFDM Systems Via the EM Algorithm

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Authors
Lee, Jong-Ho; Han, Jae Choong; Kim, Seong-Cheol
Issue Date
2006-01
Publisher
Institute of Electrical and Electronics Engineers (IEEE); IEEE Vehicular Technology Society
Citation
IEEE Transactions on Vehicular Technology, vol. 55, no. 1, pp. 167-172, Jan 2006
Keywords
channel estimation; expectation–maximization (EM); frequency synchronization; orthogonal frequency-division multiplexing (OFDM)
Abstract
A joint carrier frequency synchronization and channel estimation scheme is proposed for orthogonal frequencydivision multiplexing (OFDM) system. In the proposed scheme, carrier frequency synchronization and channel estimation are performed iteratively via the expectation–maximization (EM) algorithm using an OFDM preamble symbol. Moreover, we analytically investigate the effect of frequency offset error on the mean square error (MSE) performance of channel estimator. Simulation results present that the proposed scheme achieves almost ideal performance for both channel and frequency offset estimation.
ISSN
0018-9545
Language
English
URI
http://hdl.handle.net/10371/5206
DOI
https://doi.org/10.1109/TVT.2005.861212
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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