Bandwidth efficiency improvement of optical wireless link based on yellow phosphor coated light emitting diode using non‐orthogonal frequency shift keying | Zendy

Won YongYuk | Zendy; Yoon Sang Min | Zendy; Seo Dongsun | Zendy

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Bandwidth efficiency improvement of optical wireless link based on yellow phosphor coated light emitting diode using non‐orthogonal frequency shift keying

Author(s) -

Won YongYuk,

Yoon Sang Min,

Seo Dongsun

Publication year - 2017

Publication title -

microwave and optical technology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.304

H-Index - 76

eISSN - 1098-2760

pISSN - 0895-2477

DOI - 10.1002/mop.30548

Subject(s) - phosphor , keying , bandwidth (computing) , optoelectronics , optical wireless , wireless , visible light communication , materials science , diode , light emitting diode , phase shift keying , electronic engineering , computer science , telecommunications , bit error rate , engineering , decoding methods

A non‐orthogonal frequency shift keying (NOFSK) modulation technique, which increases the bandwidth efficiency of an optical wireless link based on a yellow phosphor coated‐light emitting diode (ypc‐LED), is proposed in this article. A 4‐NOFSK signal is transmitted using an optical wireless link based on the ypc‐LED. One more bit per symbol are transmitted successfully showing the only 3% increase of 2‐MHz physical bandwidth at the bit error rate (BER) below 10 −5 . It is implied that the bandwidth efficiency is increased twice as much as ypc‐LED modulated by off keying (OOK) signal. Furthermore, there was no ICI effect at the frequency spacing of 2 kHz (0.1% of 2‐MHz physical bandwidth), which corresponds to 0.1% of the symbol rate of 2 Msymbols/s. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1371–1375, 2017

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