Luo, P;
Jiang, T;
Haigh, PA;
Ghassemlooya, Z;
Zvanovec, S;
(2018)
Undersampled Pulse Width Modulation for Optical Camera Communications.
In:
Proceedings of the 2018 IEEE International Conference on Communications Workshops (ICC Workshops).
IEEE: Kansas City, MO, USA.
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Abstract
An undersampled pulse width modulation (UPWM) scheme is proposed to enable users to establish a non- flickering optical camera communications (OCC) link. With UPWM, only a digital light emitting diode (LED) driver is needed to send signals using a higher order modulation. Similar to other undersample-based modulation schemes for OCC, a dedicated preamble is required to assist the receiver to indicate the phase error introduced during the undersampling process, and to compensate for nonlinear distortion caused by the in-built gamma correction function of the camera. To test the performance of the UPWM- based OCC system, an experimental test-bed is developed. The experimental results show that the proposed system is able to achieve a data rate of 150 bps (spectrum efficiency of 5 bits/symbol) at a bit error rate of 6.76×10^-4, which is well below the forward error correction limit of 3.8×10^-3, over a link span of 1 m using a Huawei Nexus 6P smartphone with a frame rate of 30 fps.
| Type: | Proceedings paper |
|---|---|
| Title: | Undersampled Pulse Width Modulation for Optical Camera Communications |
| Event: | IEEE International Conference on Communications (ICC) |
| Location: | Kansas City, MO |
| Dates: | 20 May 2018 - 24 May 2018 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ICCW.2018.8403732 |
| Publisher version: | http://dx.doi.org/10.1109/ICCW.2018.8403732 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Optical camera communications, undersampled pulse width modulation, visible light communications |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10059302 |
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