Performance Characterization of Phase Shift Keying Modulation Techniques for Indoor Visible Light Communication System.
- Resource Type
- Article
- Authors
- Zaiton, A. M.; Rahim, H. R. A.; Jasman, F.; Yong, C. K.
- Source
- AIP Conference Proceedings. 2020, Vol. 2203 Issue 1, p020023-1-020023-7. 7p.
- Subject
- *OPTICAL communications
*TELECOMMUNICATION systems
*VISIBLE spectra
*LIGHT transmission
*RADIO frequency
*PHASE shift keying
*ELECTRONIC modulation
- Language
- ISSN
- 0094-243X
Visible light communication (VLC) is seen as a complementary technology to the conventional Radio Frequency (RF) technology due to its high bandwidth. Most VLC systems are based on intensity modulation/direct detection scheme where the intensity of the optical carrier is modulated. In this paper, two types of modulation schemes namely On-Off Keying (OOK) and Phase Shift Keying (PSK) are investigated. First, the transmitter and receiver circuit for both types of modulation schemes are constructed. LED with 570 nm wavelength is used as the source at the transmitter and a photodiode is used at the receiver. This study proves that PSK can be used for indoor visible light transmission. Then the performance of both modulation schemes is evaluated in terms of the received voltage versus distance in the presence of background ambience light and also without light. The performance of the unmodulated signal is also included for comparison purposes. It is observed that a longer communication distance can be achieved when PSK modulation is used compared to OOK and unmodulated signal. [ABSTRACT FROM AUTHOR]