CNN Aided Weighted Interpolation for Channel Estimation in Vehicular Communications

• Published in: IEEE transactions on vehicular technology Vol. 70; no. 12; pp. 12796 - 12811
• Main Authors: Gizzini, Abdul Karim, Chafii, Marwa, Nimr, Ahmad, Shubair, Raed M., Fettweis, Gerhard P.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers
• Subjects: Artificial Intelligence; Channel estimation; Channels; Computational complexity; Computer Science; deep learning; Estimation; IEEE 802.11p standard; Information Theory; Interpolation; OFDM; Receivers; Signal and Image Processing; Traffic management; vehicular communications; Wireless communications; deep learning; vehicular communications; Channel estimation; IEEE 802.11p standard
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2021.3120267

IEEE 802.11p standard defines wireless technology protocols that enable vehicular transportation and manage traffic efficiency. A major challenge in the development of this technology is ensuring communication reliability in highly dynamic vehicular environments, where the wireless communication channels are doubly selective, thus making channel estimation and tracking a relevant problem to investigate. In this paper, a novel deep learning (DL)-based weighted interpolation estimator is proposed to accurately estimate vehicular channels especially in high mobility scenarios. The proposed estimator is based on modifying the pilot allocation of the IEEE 802.11p standard so that more transmission data rates are achieved. Extensive numerical experiments demonstrate that the developed estimator significantly outperforms the recently proposed DL-based frame-by-frame estimators in different vehicular scenarios, while substantially reducing the overall computational complexity.