قاسملويي، ذ نويسنده Optical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, UK Ghassemlooy, Z , وو، د نويسنده Optical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, UK Wu, D , خليقي، م.ا نويسنده Ecole Centrale Marseille, Institute Fresnel, Marseille, France Khalighi, M.A , تانگ، ايكس نويسنده Department of Electronic Engineering, Tsinghua University, Beijing, China Tang, X
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.