71-Mbit/s ultraviolet-B LED communication link based on 8-QAM-OFDM modulation | Zendy

Xiaobin Sun | Zendy; Zhenyu Zhang | Zendy; Anas Chaaban | Zendy; Tien Khee Ng | Zendy; Chao Shen | Zendy; Rui Chen | Zendy; Jianchang Yan | Zendy; Haiding Sun | Zendy; Xiaohang Li | Zendy; Junxi Wang | Zendy; Jinmin Li | Zendy; MohamedSlim Alouini | Zendy; Boon S. Ooi | Zendy

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71-Mbit/s ultraviolet-B LED communication link based on 8-QAM-OFDM modulation

Author(s) -

Xiaobin Sun,

Zhenyu Zhang,

Anas Chaaban,

Tien Khee Ng,

Chao Shen,

Rui Chen,

Jianchang Yan,

Haiding Sun,

Xiaohang Li,

Junxi Wang,

Jinmin Li,

MohamedSlim Alouini,

Boon S. Ooi

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.023267

Subject(s) - quadrature amplitude modulation , optics , orthogonal frequency division multiplexing , visible light communication , bit error rate , free space optical communication , optical communication , qam , megabit , physics , computer science , materials science , optoelectronics , telecommunications , light emitting diode , channel (broadcasting)

A demonstration of ultraviolet-B (UVB) communication link is implemented utilizing quadrature amplitude modulation (QAM) orthogonal frequency-division multiplexing (OFDM). The demonstration is based on a 294-nm UVB-light-emitting-diode (UVB-LED) with a full-width at half-maximum (FWHM) of 9 nm and light output power of 190 μW, at 7 V, with a special silica gel lens on top of it. A -3-dB bandwidth of 29 MHz was measured and a high-speed near-solar-blind communication link with a data rate of 71 Mbit/s was achieved using 8-QAM-OFDM at perfect alignment. 23.6 Mbit/s using 2-QAM-OFDM when the angle subtended by the pointing directions of the UVB-LED and photodetector (PD) is 12 degrees, thus establishing a diffuse-line-of-sight (LOS) link. The measured bit-error rate (BER) of 2.8 ×10 -4 and 2.4 ×10 -4 , respectively, are well below the forward error correction (FEC) criterion of 3.8 ×10 -3 . The demonstrated high data-rate OFDM-based UVB communication link paves the way for realizing high-speed non-line-of-sight free-space optical communications.

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