A State-space Approach for Efficient Channel Tracking in OFDM Transmissions

In this paper we consider a multipath channel subject to variations in time due to the presence of a Doppler term which imposes a phase rotation on the original channel impulse response. Accordingly, a decision-directed state-space approach based on the extended Kalman filter (EKF) is proposed to tr...

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Bibliographic Details
Published inIEEE Vehicular Technology Conference pp. 1 - 5
Main Authors Pedrosa, P., Castanheira, D., Silva, A., Dinis, R., Gameiro, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2020
Subjects
Doppler effect
Frequency division multiplexing
Multipath channels
OFDM
Time-frequency analysis
Training
Vehicular and wireless technologies
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ISSN2577-2465
DOI10.1109/VTC2020-Fall49728.2020.9348554

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Summary:In this paper we consider a multipath channel subject to variations in time due to the presence of a Doppler term which imposes a phase rotation on the original channel impulse response. Accordingly, a decision-directed state-space approach based on the extended Kalman filter (EKF) is proposed to track the channel variation. This approach is particularly efficient since we are able to reduce the number of pilot symbols used for channel tracking by using a decision-directed approach. In fact, only two training symbols are required to initialize the EKF. Our approach is validated considering orthogonal frequency-division multiplexing (OFDM) schemes.
ISSN:2577-2465
DOI:10.1109/VTC2020-Fall49728.2020.9348554