Effect of modulation technique in Mach-Zehnder Modulator (MZM) in optical OFDM system
This paper highlights the bit error rate (BER) performance of a radio-over-fiber system utilizing binary phase shift keying (BPSK), M-QAM, QPSK in the external modulator which is the Mach-Zehnder modulator (MZM). The results have been obtained from the RoF link over 8, 30, 60 90 and 120 km...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IRACST
2014
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/39082/1/2014_IJCNWC.pdf http://irep.iium.edu.my/39082/ http://www.ijcnwc.org/vol4no4.htm |
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| Summary: | This paper highlights the bit error rate (BER)
performance of a radio-over-fiber system utilizing binary
phase shift keying (BPSK), M-QAM, QPSK in the external
modulator which is the Mach-Zehnder modulator (MZM). The
results have been obtained from the RoF link over 8, 30, 60 90
and 120 km distance to study the effect of nonlinear
dispersion and attenuation of signal and compare the results
other modulation. Furthermore, the chromatic dispersion has
no effect on MZM whereas it has distinct effect on OOK
modulation scheme without optical dispersion compensation, the
performances of different modulation schemes such as OOK,
PPM and PAM are analyzed. Comparisons of transmission
distance, transmission capacity, bandwidth efficiency in coherent
optical orthogonal frequency division multiplexing (CO-OFDM)
system are included. Simulation results are given using Matlab,
Simulink and Optisystem software. The results also show the
importance of upconverter to reduce the nonlinearity effect in
the transmission channel.
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