On Optically Pre-amplified FSO-MISO Non-identical Links with Correlation: Experiment and Analysis
Type of document
stať ve sborníkuconference paper
Peer-reviewed
acceptedVersion
Author
Priyadarshani R.
Bhatnagar M.
Bohata J.
Zvánovec S.
Ghassemlooy Z.
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In this paper, various link characteristics and bit
error rate (BER) performance of a free-space optical (FSO)
multiple-input-single-output (MISO) system with repetition cod-
ing (RC) is investigated both experimentally and theoretically.
The study is performed in the presence of atmospheric turbulence
(AT) over a correlated channel with an erbium-doped fiber am-
plifier employed at the receiver (Rx). It is shown experimentally
that the measured AT levels of two parallel links are different and
the links experience non-identical fading influence. The analytical
BER expression for an optically pre-amplified correlated FSO-
MISO system with non-identical AT channel is derived. The BER
results of the considered system with pre-amplifier is compared
with the BER results of an FSO system without pre-amplifier, and
it is shown analytically that a 2×1 FSO system with pre-amplifier
offers better BER performance in terms of coding gain of 6
dB over the system without pre-amplifier. Moreover, it is also
shown that the FSO system with RC gives better performance
with identical links as compared to non-identical links. Further, it
is also revealed that the diversity order of the considered system
is independent of correlation and use of pre-amplifier. All the
analytical results are validated by comparing them with Matlab
simulations.
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