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Title: Efficient joint channel equalization and tracking for V2X communications using SC-FDE schemes
Author: Pedrosa, Pedro
Castanheira, Daniel
Silva, Adão
Dinis, Rui
Gameiro, Atílio
Keywords: Adaptive equalizers
Channel estimation
Digital communication
Kalman filters
Signal processing
Signal processing algorithms
Vehicular and wireless technologies
Issue Date: 18-Mar-2020
Publisher: IEEE
Abstract: Our aim with this paper is to present a solution suitable for vehicle-to-everything (V2X) communications, particularly, when employing single-carrier modulations combined with frequency-domain equalization (SC-FDE). In fact, we consider the V2X channel to be doubly-selective, where the variation of the channel in time is due to the presence of a Doppler term. Accordingly, the equalization procedure is dealt by a low-complexity iterative frequency-domain equalizer based on the iterative block decisionfeedback equalization (IB-DFE) while the tracking procedure is conducted employing an extended Kalman filter (EKF). The proposed system is very efficient since it allows a very low density of training symbols, even for fast-varying channels. Furthermore only two training symbols are required to initialize the tracking procedure. Thus, ensuring low latency together with reduced channel estimation overheads.
Peer review: yes
DOI: 10.1109/ACCESS.2020.2981717
ISSN: 2169-3536
Appears in Collections:DETI - Artigos
IT - Artigos

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