Efficient joint channel equalization and tracking for V2X communications using SC-FDE schemes

Pedro Pedrosa, Daniel Castanheira, Adão Silva, Rui Dinis, Atílio Gameiro

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

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 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.

Original languageEnglish
Article number9040534
Pages (from-to)55158-55169
Number of pages12
JournalIEEE Access
Volume8
DOIs
Publication statusPublished - 2020
Event90th IEEE Vehicular Technology Conference, VTC 2019 Fall - Honolulu, United States
Duration: 22 Sep 201925 Sep 2019

Keywords

  • Adaptive equalizers
  • channel estimation
  • digital communication
  • Kalman filters
  • signal processing
  • signal processing algorithms
  • vehicular and wireless technologies

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