Paper Info
Title
Parallel Transmission Using $M$-Point DFT for Image-Sensor-Based Visible Light Communication.
Abstract
This paper proposes a parallel transmission (PT) system using $M$ -point discrete Fourier transform (DFT) for image-sensor-based (IS-based) visible light communications (VLC). We make use of $M$ -point inverse DFT (IDFT) to generate pulse width modulation (PWM) signals transmitted by $M$ spatially aligned LEDs. The $M$ PWM signals are pre-calculated to give $N$ phase shifted carriers after $M$ -point DFT, where $N=lfloor(M-1)/2rfloor$ and $lfloor zrfloor$ stands for the maximum integer not exceeding $z$ . Therefore, the IS receiver of a high-speed camera captures the LEDs to obtain the $M$ inputs to the DFT from the luminance values of the captured LEDs. During a symbol interval equal to the exposure time of the high-speed camera, $N log_{2}P$ bits in total are simultaneously transmitted between the LEDs and IS-based receiver, when $P$ -ary PSK is used for all the carriers. We experimentally demonstrate our PT system at the distance of nine meters between $M$ PWM-modulated LEDs and a 2000-fps high-speed camera. Our experimental results validate that PSK symbols are demodulated without errors for smaller values of $M$ and $P$ , with controlling the aperture of the lens of the camera receiver.
Year
DOI
Venue
2018
10.1109/GLOCOMW.2018.8644501
GLOBECOM Workshops
Field
DocType
Citations 
Aperture,Topology,Inverse,Image sensor,Computer science,Pulse-width modulation,Visible light communication,Real-time computing,Discrete Fourier transform,Luminance,Phase-shift keying
Conference
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Syuto Kibe100.34
Koji Kamakura2117.53
takaya yamazato323945.32