TY - GEN
T1 - Effect of Pointing Errors on BER Performance of Multidimensional LDPC-Coded OAM Modulation with Direct Detection over Turbulent FSO Channels
AU - Djordjevic, Goran T.
AU - Djordjevic, Ivan B.
N1 - Publisher Copyright: © 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - In this invited paper, we study orbital angular momentum (OAM) - based signal transmission over free-space optical (FSO) link. After low-density parity-check (LDPC) encoding and multidimensional mapping, intensity modulation is implemented, and OAM multiplexing is performed. Signal is transmitted over FSO channel with atmospheric turbulence, pointing errors, and atmospheric loss. At the receiver end, signal is firstly demultiplexed by OAM demultiplexer, detected by photodiode, and further decoded by applying the multidimensional posterior-probability demapper and LDPC decoder. The bit-error rate (BER) performances are estimated by Monte Carlo simulations. The numerical results show that even when there is a strong misalignment between transmitter and receiver apertures, BER of the system can be reduced by applying appropriate quasi-cyclic LDPC codes. We show that BER values under 10-6 can be achieved for some typical values of electrical energy per information bit - to - noise spectral density ratio even when turbulence is strong.
AB - In this invited paper, we study orbital angular momentum (OAM) - based signal transmission over free-space optical (FSO) link. After low-density parity-check (LDPC) encoding and multidimensional mapping, intensity modulation is implemented, and OAM multiplexing is performed. Signal is transmitted over FSO channel with atmospheric turbulence, pointing errors, and atmospheric loss. At the receiver end, signal is firstly demultiplexed by OAM demultiplexer, detected by photodiode, and further decoded by applying the multidimensional posterior-probability demapper and LDPC decoder. The bit-error rate (BER) performances are estimated by Monte Carlo simulations. The numerical results show that even when there is a strong misalignment between transmitter and receiver apertures, BER of the system can be reduced by applying appropriate quasi-cyclic LDPC codes. We show that BER values under 10-6 can be achieved for some typical values of electrical energy per information bit - to - noise spectral density ratio even when turbulence is strong.
KW - atmospheric turbulence
KW - error performance
KW - free-space optics
KW - LDPC codes
KW - orbital angular momentum
KW - pointing errors
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U2 - 10.1109/ICTON59386.2023.10207427
DO - 10.1109/ICTON59386.2023.10207427
M3 - Conference contribution
T3 - International Conference on Transparent Optical Networks
BT - 2023 23rd International Conference on Transparent Optical Networks, ICTON 2023
A2 - Jaworski, Marek
A2 - Marciniak, Marian
PB - IEEE Computer Society
T2 - 23rd International Conference on Transparent Optical Networks, ICTON 2023
Y2 - 2 July 2023 through 6 July 2023
ER -