'Institute of Electrical and Electronics Engineers (IEEE)'
Doi
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.publishe