Joint channel and phase noise estimation in OFDM systems at very high speeds

In this paper, the problem of joint phase noise and channel estimation for OFDM systems over a fast time-varying frequency-selective channel is explored. Each channel tap time-variation within one OFDM symbol is approximated by a Basis Expansion Model (BEM). Joint estimation is performed on multiple...

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Bibliographic Details
Published in:International journal of electronics and communications 2013-01, Vol.67 (4), p.295-300
Main Authors: Fang, Jin, Simon, Eric Pierre, Berbineau, Marion, Lienard, Martine
Format: Article
Language:English
Subjects:
Channel estimation
Fast fading
OFDM
Phase noise
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Summary:In this paper, the problem of joint phase noise and channel estimation for OFDM systems over a fast time-varying frequency-selective channel is explored. Each channel tap time-variation within one OFDM symbol is approximated by a Basis Expansion Model (BEM). Joint estimation is performed on multiple OFDM symbols via the Extended Kalman Filtering in order to exploit the time-correlation of the parameters. The data symbols are estimated by means of an iterative pilot-based algorithm. It is shown that, with only 2 iterations, our algorithm outperforms the conventional one, and the performance approaches that of the ideal case for which the channel response and phase noise are known.
ISSN:1434-8411
1618-0399
DOI:10.1016/j.aeue.2012.09.002