Paper Info
Title
Spatially-modulated space-time coding in visible light communications using 2×2 LED array
Abstract
This paper demonstrates the feasibility of binary spatially-modulated space-time (SM-ST) coding in an outdoor image-sensor-based visible light communication (VLC) system. We showed that at the transmission distance where intensity modulated symbols from two different light emitting diodes (LEDs) are detected at one pixel of the image plane of the image sensor, space time (ST) coding enables to decouple the two symbols and to extend error-free transmission distance. We furthermore aim at increasing transmission rate per symbol duration when the spatial resolution is improved when the receiver approaches the LED array of the transmitter, by superimposing space shift keying (SSK) signal with the diagonal and anti-diagonal set of the 2×2 matrix onto the LED patterns. We built an experimental testbed with LEDs modulated at 1 kbps and a high-speed camera operating at 1,000 fps. Our experimental results validate that SM-ST coding achieves 30 m of the error-free transmission distance for the additional bit based on SSK, without deteriorating the reception quality and range of the space-time coded bits.
Year
DOI
Venue
2014
10.1109/APCCAS.2014.7032784
Circuits and Systems
Keywords
Field
DocType
cameras,image sensors,light emitting diodes,optical communication,space-time codes,LED array,SM-ST coding,SSK signal,VLC system,binary spatially-modulated space-time coding,bit rate 1 kbit/s,distance 30 m,error-free transmission distance,high-speed camera,image plane,light emitting diodes,outdoor image-sensor-based visible light communication system,reception quality,space shift keying signal,spatial resolution,transmission rate per symbol duration,transmitter
Space–time code,Transmitter,Image sensor,Computer science,Image plane,Electronic engineering,Modulation,Visible light communication,Pixel,Image resolution
Conference
Citations 
PageRank 
References 
1
0.37
2
Authors
3
Name
Order
Citations
PageRank
Katsunori Ebihara110.37
Koji Kamakura2117.53
takaya yamazato323945.32