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.


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    Title :

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


    Contributors:
    Pedrosa, P. (author) / Castanheira, D. (author) / Silva, A. (author) / Dinis, R. (author) / Gameiro, A. (author)


    Publication date :

    2020-11-01


    Size :

    1102731 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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