Experimental Demonstration of a 1024-QAM Optical Camera Communication System

Luo, Pengfei, Zhang, Min, Ghassemlooy, Zabih, Le Minh, Hoa, Tsai, Hsin-Mu, Tang, Xuan and Han, Dahai (2016) Experimental Demonstration of a 1024-QAM Optical Camera Communication System. IEEE Photonics Technology Letters, 28 (2). pp. 139-142. ISSN 1041-1135

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Official URL: http://dx.doi.org/10.1109/LPT.2015.2487544

Abstract

In this letter, we experimentally demonstrate a 1024-quadrature-amplitude-modulation (QAM) optical camera communications (OCC) system using a dual light-emitting diode (LED) and a commercial digital single-lens reflex camera. An undersampled QAM subcarrier modulation (UQAMSM) is proposed to support a high-efficiency and non-flickering OCC system. Owing to the built-in gamma correction function of the camera, pre- and post-compensation techniques are successfully applied to compensate for the non-linear impairment. A dedicated framing structure is also designed to support the proposed UQAMSM and compensation techniques. The experimental results show that this system is able to achieve a data rate of 500 b/s using a dual LED and a 50 ft/s commercial camera over a transmission span of 1.5 m, which is suitable for the transmission and reception of location-based information.

Item Type: Article
Uncontrolled Keywords: Compensation, optical camera communications, undersampled quadrature-amplitude-modulation subcarrier modulation, visible light communications
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 15 Jan 2016 14:08
Last Modified: 24 Oct 2017 08:52
URI: http://nrl.northumbria.ac.uk/id/eprint/25472

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