FPGA emulation of polarization-mode dispersion in optical fibers
Typ
Examensarbete för masterexamen
Program
Publicerad
2021
Författare
ZHOU, HONG
KAN, HAORUI
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Improving the transmission capacity through polarization-division mode (PDM)
technology has given rise to polarization-mode dispersion (PMD) effect in opti cal fiber communication system. Research and analysis of how various parameters
on optical fiber PMD will impact the system performance can help us reducing or
equalizing PMD more efficiently. But the parameters cannot be easily changed in
the optical fiber experiment to observe the impact on PMD. Therefore, we have built
a real-time digital model of PMD based on field-programmable gate array (FPGA),
which can change the parameters during operation and capture the output signal
after adding PMD. At the same time, a general equalizer digital model was built to
handle the PMD impairment. We build a two-polarization optical fiber emulating
system which includes transmitter, additive white Gaussian noise (AWGN), PMD
emulator, equalizer and receiver. This system allowed us to observe the impact of
changing the various parameters of the PMD on the equalizer.
Beskrivning
Ämne/nyckelord
Optical communication , PMD emulator , CMA equalizer , FPGA , real-time , fractional delay filter