Indirect Diffused Light Free-Space Optical Communications for Vehicular Networks

Yagiz Kaymak, Sina Fathi-Kazerooni, Roberto Rojas-Cessa

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


In this letter, we propose a novel indirect diffused light free-space optical communications (ID-FSOC) system based on laser light. This ID-FSOC system aims to provide high-speed (i.e., ≥1 Gbps) Internet access to vehicles. This approach extends the FSOC reach to locations that are out of sight from the transmitter. The proposed communications system employs diffuse reflectors (DRs) to uniformly emit diffused incident laser light in all directions, except toward the DR, which enables the receivers to receive the diffused light despite having no direct line-of-sight (LOS) to the transmitter but only to the DR. In our approach, LOS is required between the transmitter and the DR and between the receiver and the DR. We model the received power of the diffused light and estimate the power and bit error rate as perceived by a moving vehicle. Furthermore, we introduce possible operation modes to realize full duplex communications with ID-FSOC. Our results show the relationship between the transmission power and the DR-receiver distance and show that high data rates are achievable on practical DR-receiver distances.

Original languageEnglish (US)
Article number8663407
Pages (from-to)814-817
Number of pages4
JournalIEEE Communications Letters
Issue number5
StatePublished - May 2019

All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


  • Free-space optical communications
  • Lambertian diffusion
  • diffuse reflection
  • indirect optical communications
  • optical wireless communications


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