4-ary CSK Modulation Scheme Better than RGBW for LCD-Screen Camera Communications
AC Gordillo - … Computing and Communications (IUCC/CIT/DSCI …, 2021 - ieeexplore.ieee.org
2021 20th International Conference on Ubiquitous Computing and …, 2021•ieeexplore.ieee.org
The extended adoption of portable computing equipment allows cheap and effortless access
a screen and a camera, which can be exploited to suggest a wireless optical
communications structure for specific applications. However, it faces low data rate
performance because of the camera and screen physical limitations. Color shift keying
(CSK) arises as a modulation alternative to circumvent this problem and the particular case
of 4-ary CSK is addressed in this paper. We focus our attention on how machines perceive …
a screen and a camera, which can be exploited to suggest a wireless optical
communications structure for specific applications. However, it faces low data rate
performance because of the camera and screen physical limitations. Color shift keying
(CSK) arises as a modulation alternative to circumvent this problem and the particular case
of 4-ary CSK is addressed in this paper. We focus our attention on how machines perceive …
The extended adoption of portable computing equipment allows cheap and effortless access a screen and a camera, which can be exploited to suggest a wireless optical communications structure for specific applications. However, it faces low data rate performance because of the camera and screen physical limitations. Color shift keying (CSK) arises as a modulation alternative to circumvent this problem and the particular case of 4-ary CSK is addressed in this paper. We focus our attention on how machines perceive color and identify two 4-ary sets of equidistant colors employing communications theory. We emphasize the use of a LCD screen as a transmitter and an off-the-shelf smartphone camera as a receiver. Our results show that color set formed by aqua, fuchsia, yellow and black outperforms the color set comprising red (R), green (G), blue (B) and white (W) in a 4-CSK modulation scheme. In addition, we found that the mean value of the received pixels color components is adequate for detection when a LCD screen is the transmitter. Moreover, we identify some optical distortions that degrade the system performance when distance between transmitter and receiver is 18.2 cm.
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