Low Complexity Least Minimum Symbol Error Rate Based Post-Distortion for Vehicular VLC

Rangeet Mitra, Farshad Miramirkhani, Vimal Bhatia, Murat Uysal

Research output: Contribution to journalArticlepeer-review

Abstract

Vehicular visible light communications (VLC) has emerged as a viable supplement for high speed next-generation vehicle to vehicle (V2V) communication systems. However, performance of a V2V-VLC link is impaired due to nonlinear transfer-characteristics of light emitting diodes (LEDs), and inter-symbol interference (ISI). In this article, a low-complexity least-squares based post-distortion algorithm is formulated over reproducing kernel Hilbert space (RKHS) for a multi-hop V2V-VLC link. The impairments encountered in V2V-VLC channels are mitigated in RKHS by a minimum symbol error-rate post-distorter using a low dimensional approximation of random Fourier features (RFF) (which is a soft approximation of the feature-map to RKHS), that facilitates computationally simple post-distortion under finite memory-budget. The convergence and the BER-performance of the proposed post-distorter is analyzed over realistic V2V VLC channels obtained via ray-tracing. From the analysis, and the presented computer-simulations, the proposed post-distorter is found to exhibit equivalent convergence characteristics and error-rate over reasonable distances, with much lower computational complexity.

Original languageEnglish (US)
Article number9174818
Pages (from-to)11800-11810
Number of pages11
JournalIEEE Transactions on Vehicular Technology
Volume69
Issue number10
DOIs
StatePublished - Oct 2020

Keywords

  • RFF
  • RKHS
  • V2V
  • VLC
  • autoencoders

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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