%0 Generic
%A Luo, P
%A Jiang, T
%A Haigh, PA
%A Ghassemlooya, Z
%A Zvanovec, S
%C Kansas City, MO, USA
%D 2018
%F discovery:10059302
%I IEEE
%K Optical camera communications, undersampled pulse width modulation, visible light communications
%T Undersampled Pulse Width Modulation for Optical Camera Communications
%U https://discovery.ucl.ac.uk/id/eprint/10059302/
%X 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.
%Z This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.