그림 1. 가시광 통신 사용자 인식 시스템의 전체 구조 Fig. 1 Block diagram of the user-aware system using a Visible Light Communication
그림 2. NRZ 방식의 비동기식 통신 시 데이터 수신 실패 사례 Fig. 2 Incorrectly received data using asynchronous communication with NRZ data
그림 4. 포토다이오드 모듈의 회로도 Fig. 4 Schematic of the photodiode module
그림 5. 가시광 통신을 이용한 사용자 인식 시스템 알고리즘 Fig. 5 Algorithm of the user aware system using a VLC
그림 6. 사용자 인식 시스템의 구성 Fig. 6 Composition of the user aware system
그림 7. 안드로이드 모바일 인터페이스 화면 Fig. 7. Display of Android mobile interface
그림 8. 수신된 가시광 신호의 측정 파형 Fig. 8 Measured waveform of the received visual light signals
그림 3. (a) 데이터 패킷의 구조와 (b) 연속된 데이터 패킷의 전송 Fig. 3 (a) Structure of the used data packet and (b) gapless data packet transmission
표 1. 전송 패킷 데이터의 패턴 Table. 1 Patterns of the transmitted packet data
References
- J. Park and B. Kim, "Trends and Technical Requirements for 5G Mobile Communication Systems," J. of the Korea Institute of Electronic Communication Science, vol. 10, no. 11, 2015, pp. 1257-1264. https://doi.org/10.13067/JKIECS.2015.10.11.1257
- Y. Ju, H. Lee, and J. Oh, "Design and Implementation of Gas Leakage Alarm IoT System for Safety Helmet," J. of the Korea Institute of Electronic Communication Science, vol. 13, no. 6, 2018, pp. 1411-1416. https://doi.org/10.13067/JKIECS.2018.13.6.1411
- B. Kim, S. Kim, H. Song, B. Kim, and Y. Han, "A Study on Location Tracking Streetlight," J. of the Korea Institute of Electronic Communication Science, vol. 13, no. 6, 2018, pp. 1275-1280. https://doi.org/10.13067/JKIECS.2018.13.6.1275
- J. Lee, H. Kim, J. Kim, J. Bae, and C. Ryu, "Remote Control Robot Arm Using Leap Motion Sensor and Bluetooth Communication," J. of the Korea Institute of Electronic Communication Science, vol. 12, no. 6, 2017, pp. 1127-1134. https://doi.org/10.13067/JKIECS.2017.12.6.1127
- C. Kim, J. Lee, and Y. Goh, "The UV LED Bar Optimal Design with Human Detection and Control Function," J. of the Korea Institute of Electronic Communication Science, vol. 12, no. 6, 2017, pp. 1219-1226. https://doi.org/10.13067/JKIECS.2017.12.6.1219
- D. Ryu and T. Choi, "Development of Open IoT platform based on Open Source Hardware & Cloud Service," J. of the Korea Institute of Electronic Communication Science, vol. 11, no. 5, 2016, pp. 485-490. https://doi.org/10.13067/JKIECS.2016.11.5.485
- X. Hao and C. Kim, "Design and Implementation of LED Lighting Control System Using Arduino Yun and Cloud in IoT," J. of the Korea Institute of Electronic Communication Science, vol. 11, no. 10, 2016, pp. 983-988. https://doi.org/10.13067/JKIECS.2016.11.10.983
- H. Lee and J. Oh, "Design and Implementation of a Small Server Room Environment Monitoring System by Using the Arduino," J. of the Korea Institute of Electronic Communication Science, vol. 12, no. 2, 2017, pp. 385-390. https://doi.org/10.13067/JKIECS.2017.12.2.385
- T. Kim, H. Jang, and W. Lee, "An Inter-floor Noise Prevention System using an Open-source Controller," J. of the Korea Institute of Electronic Communication Science, vol. 12, no. 5, 2017, pp. 899-906. https://doi.org/10.13067/JKIECS.2017.12.5.899
- W. Choi, T. Anand, G. Shu, A. Elshazly, and P. Hanumolu, "A Burst-Mode Digital Receiver With Programmable Input Jitter Filtering for Energy Proportional Links," IEEE J. of Solid-State Circuits, vol. 50, no. 3, Mar. 2015, pp. 737-748. https://doi.org/10.1109/JSSC.2015.2390613