Abstract
Radio-frequency technologies are widely applied in many fields such as mobile systems, healthcare systems, television and radio broadcasting, and satellite communications. However, one major problem in wireless communication based on radio frequencies is its impact on human health. High frequencies adversely impact human health more than low frequencies if the signal power transgresses the permissible threshold. Therefore, researchers are investigating the use of visible light waves (instead of the radio-frequency band) for data transmission in three major areas: visible light communication, light fidelity, and optical camera communication. In this paper, we propose a scheme that upgrades the camera on–off keying (COOK) scheme by using it with the multiple-input multiple-output (MIMO) scheme; COOK has been recommended by the IEEE 802.15.7-2018 standard. By applying technologies, such as matched filter, region of interest, and MIMO, our proposed scheme promises to improve the performance of the conventional scheme by improving the data rate, communication distance, and bit error rate. By controlling the exposure time, the focal length in a single camera and using channel coding, our proposed scheme can achieve the communication distance of up to 20 m, with a low error rate.
Highlights
Wireless communication presents advantages over wired communication because it is easier to set up and broadcast data without having to use wires
We proposed the multiple-input multiple-output (MIMO)–camera on–off keying (COOK) scheme, which was an upgrade of the conventional
The MIMO–COOK scheme uses a matched filter instead of a zero-crossing filter; this significantly improved the performance of the optical camera communication (OCC) system
Summary
Wireless communication presents advantages over wired communication because it is easier to set up and broadcast data without having to use wires. It is important to consider that when the line-of-sight transmission is gained by the channel model, visible light waves are more safe and efficient Given this potential, many companies are investing a substantial amount in funding research on innovations in this technique. OCC uses cameras or image sensors to receive signals from a light source by using various modulation techniques. Light fidelity (Li-Fi) is a high-speed modulation scheme that uses a high-rate photodiode with data exceeding 1 Mbps in the physical layer. These technologies are recommended in [23,24] but we proposed this scheme to upgrade the conventional COOK, which is recommended in IEEE 802.15.7-2018 standard With this upgrade scheme, the system performance, distance communication and data rate are improved compared with the conventional COOK, which will be illustrated below.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
