Efficient Joint Channel Equalization and Tracking for V2X Communications Using SC-FDE Schemes

IEEE Access

卷:8

Atilio Gameiro¹  Daniel Castanheira¹  Pedro Pedrosa²  Rui Dinis²  Adao Silva³ 

[1] &x00F5;

[2] Instituto de Telecomunica&x00E7;

[3] es, Aveiro, Portugal;

关键词: Adaptive equalizers;    channel estimation;    digital communication;    Kalman filters;    signal processing;    signal processing algorithms;   

DOI  :  10.1109/ACCESS.2020.2981717

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown