TY - GEN
T1 - On optically pre-amplified FSO-MISO non-identical links with correlation
T2 - 2019 IEEE Global Communications Conference, GLOBECOM 2019
AU - Priyadarshani, Richa
AU - Bhatnagar, Manav R.
AU - Bohata, Jan
AU - Zvanovec, Stanislav
AU - Ghassemlooy, Zabih
PY - 2019/12
Y1 - 2019/12
N2 - 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 coding (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 amplifier 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 FSOMISO 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 X 1 FSO system with pre-amplifier offers better BER performance in terms of coding gain of /spl approx/ 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.
AB - 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 coding (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 amplifier 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 FSOMISO 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 X 1 FSO system with pre-amplifier offers better BER performance in terms of coding gain of /spl approx/ 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.
KW - Arbitrary correlation
KW - ASE noise
KW - Diversity
KW - Experimental
KW - Free-space optical communications
KW - Gamma-gamma distribution
KW - Optical pre-amplifier
KW - Spatial diversity
UR - https://www.scopus.com/pages/publications/85081962099
U2 - 10.1109/GLOBECOM38437.2019.9013242
DO - 10.1109/GLOBECOM38437.2019.9013242
M3 - Conference contribution
AN - SCOPUS:85081962099
T3 - 2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings
BT - 2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings
PB - IEEE
Y2 - 9 December 2019 through 13 December 2019
ER -