Indoor Non-directed Optical Wireless Communications - Optimization of the Lambertian Order

Authors

  • D. Wu Optical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, UK
  • M. A. Khalighi Ecole Centrale Marseille, Institute Fresnel, Marseille, France
  • X. Tang Department of Electronic Engineering, Tsinghua University, Beijing, China
  • Z. Ghassemlooy Optical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, UK
Abstract:

For an indoor non-directed line of sight optical wireless communication (NLOS-OWC) system we investigate the optimized Lambertian order (OLO) of light-emitting diodes (LEDs). We firstly derive an expression for the OLO from a conventional Lambertian LED model. Then, we analyze the indoor multi-cell NLOS-OWC channel characteristics including the optical power distribution and the multipath time dispersion for two cases of one-cell and four-cell configurations. Furthermore, we estimate the transmission bandwidth by simulating the channel frequency response. Numerical results presented show that, by using OLO a significant improvement of the transmission bandwidth can be achieved for an indoor NLOS-OWC system, in particular, for multi-cell configurations.

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Journal title

volume 1  issue 1

pages  1- 9

publication date 2013-10-01

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