BURTON, A., et al. Filter-less WDM for visible light communications using colored pulse amplitude modulation. Optics Letters. 2019, 44(19), 4849-4852. ISSN 0146-9592. DOI 10.1364/OL.44.004849.
This paper demonstrates, for the first time, a new wavelength-division multiplexing (WDM) scheme for visible light communications using multi-level coloured pulse amplitude modulation (M-CPAM). Unlike traditional WDM, no optical bandpass filters
are required and only a single optical detector is used. We show that, by transmitting n independent sets of weighted on-off keying non-return-to-zero data on separate wavelengths over a line-of-sight transmission path, the resultant additive symbols can
be successfully demodulated. Hence, the data rates can be aggregated for a single user or divided into individual colours for multiple user access schemes. The system is empirically tested for M = 4 and 8 using an off-the-shelf red, green and blue (RGB) chip light emitting diode (LED). We demonstrate that for M = 4, using the R and B chips a bit error rate (BER) of ≤10-6 can be achieved for each wavelength at bit rates up to 10 Mbps, limited by the LEDs under test. For M = 8 using R, G and B a BER of ≤10-6 can be achieved for each wavelength at bit rates up to 5 Mbps.
eng
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Optical Society of America
dc.relation.ispartof
Optics Letters
dc.subject
WDM
eng
dc.subject
Visible Light Communications
eng
dc.subject
PAM
eng
dc.title
Filter-less WDM for visible light communications using colored pulse amplitude modulation
info:eu-repo/grantAgreement/Czech Science Foundation/GA/GA17-17538S/CZ/Combined Radio Frequency and Visible Light Bands for Device-to-Device communication/