Indoor Non-directed Optical Wireless Communications -Optimization of the Lambertian Order
سال انتشار: 1392
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 1,064
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شناسه ملی سند علمی:
JR_JECEI-1-1_001
تاریخ نمایه سازی: 27 فروردین 1393
چکیده مقاله:
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 forthe OLO from a conventional Lambertian LED model. Then, we analyze theindoor multi-cell NLOS-OWC channel characteristics including the opticalpower distribution and the multipath time dispersion for two cases ofone-cell and four-cell configurations. Furthermore, we estimate thetransmission bandwidth by simulating the channel frequency response.Numerical results presented show that, by using OLO a significantimprovement of the transmission bandwidth can be achieved for anindoor NLOS-OWC system, in particular, for multi-cell configurations.
کلیدواژه ها:
Optimum Lambertian order LED Optical wireless Communication Root mean square (RMS) Delay spread
نویسندگان
Z Ghassemlooy
Optical Communications Research Group, Faculty of Engineering and Environment, Northumbria University,Newcastle Upon Tyne, UK
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