TY - GEN
T1 - Multiuser visible light communication system using hybrid OFDM-PWM
AU - Affan, Affan
AU - Khan, Usama
AU - Asif, Hafiz Muhammad
AU - Raahemifar, Kammran
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/10/20
Y1 - 2020/10/20
N2 - Visible Light Communication (VLC) is an emerging wireless optical technology in the field of data communication. The VLC systems have a wide light spectrum, which provides a high data rate and low Peak to Average Power Ratio (PAPR). One of the major issues in VLC systems is interference which is caused by daylight and other illumination sources. The other issue in VLC systems is that the transmission side provides data as complex values which causes transmission related issues and is hard to read at the receiver side due to a lot of channel noise. To solve these issues, we propose the hybrid approach of Pulse Width Modulation (PWM) and Orthogonal Frequency Division Multiplexing (OFDM) with the Code Division Multiple Access (CDMA). The CDMA is employed for multiplexing the multi-user data for transmission to accommodate a large number of users and avoid inter-user interference. The line of sight (LOS) and non-line of sight (NLoS) components of the optical channel are simulated in MATLAB. Finally, the system is also designed physically using NI modules for the real-time environment. The results show that the VLC systems with PWM-OFDM perform better as compared to simple OFDM systems.
AB - Visible Light Communication (VLC) is an emerging wireless optical technology in the field of data communication. The VLC systems have a wide light spectrum, which provides a high data rate and low Peak to Average Power Ratio (PAPR). One of the major issues in VLC systems is interference which is caused by daylight and other illumination sources. The other issue in VLC systems is that the transmission side provides data as complex values which causes transmission related issues and is hard to read at the receiver side due to a lot of channel noise. To solve these issues, we propose the hybrid approach of Pulse Width Modulation (PWM) and Orthogonal Frequency Division Multiplexing (OFDM) with the Code Division Multiple Access (CDMA). The CDMA is employed for multiplexing the multi-user data for transmission to accommodate a large number of users and avoid inter-user interference. The line of sight (LOS) and non-line of sight (NLoS) components of the optical channel are simulated in MATLAB. Finally, the system is also designed physically using NI modules for the real-time environment. The results show that the VLC systems with PWM-OFDM perform better as compared to simple OFDM systems.
KW - Code Division Multiple Access (CDMA)
KW - Pulse Width Modulation (PWM)
KW - Visible Light Communication (VLC)
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U2 - 10.1109/ISNCC49221.2020.9297203
DO - 10.1109/ISNCC49221.2020.9297203
M3 - Conference contribution
AN - SCOPUS:85099597662
T3 - 2020 International Symposium on Networks, Computers and Communications, ISNCC 2020
BT - 2020 International Symposium on Networks, Computers and Communications, ISNCC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 International Symposium on Networks, Computers and Communications, ISNCC 2020
Y2 - 20 October 2020 through 22 October 2020
ER -