TY - JOUR
T1 - Efficient joint channel equalization and tracking for V2X communications using SC-FDE schemes
AU - Pedrosa, Pedro
AU - Castanheira, Daniel
AU - Silva, Adão
AU - Dinis, Rui
AU - Gameiro, Atílio
N1 - info:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FEEI-TEL%2F30588%2F2017/PT#
POCI-01-0145-FEDER-030588
Lisboa-01-0145-FEDER-03058
POCI-01-0145-FEDER-030629
PY - 2020
Y1 - 2020
N2 - 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 decision-feedback 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.
AB - 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 decision-feedback 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.
KW - Adaptive equalizers
KW - channel estimation
KW - digital communication
KW - Kalman filters
KW - signal processing
KW - signal processing algorithms
KW - vehicular and wireless technologies
UR - http://www.scopus.com/inward/record.url?scp=85082583415&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2020.2981717
DO - 10.1109/ACCESS.2020.2981717
M3 - Conference article
AN - SCOPUS:85082583415
VL - 8
SP - 55158
EP - 55169
JO - IEEE Access
JF - IEEE Access
SN - 2169-3536
M1 - 9040534
T2 - 90th IEEE Vehicular Technology Conference, VTC 2019 Fall
Y2 - 22 September 2019 through 25 September 2019
ER -