TY - JOUR
T1 - A high-speed integrated OFDM/DPS-OCDMA-based FSO transmission system
T2 - Impact of atmospheric conditions
AU - Singh, Mehtab
AU - Abd El-Mottaleb, Somia A.
AU - Yousif Ahmed, Hassan
AU - Zeghid, Medien
AU - Nisar, Kottakkaran Sooppy
AU - Al-Ahmadi, Ameenah N.
AU - Mahmoud, Mona
N1 - Publisher Copyright:
© 2023 THE AUTHORS
PY - 2023/8/15
Y1 - 2023/8/15
N2 - Free space optics (FSO) communication systems are preferred due to their high transmission capacity so it can support the ever-increasing volume of online traffic. Optical code division multiple access (OCDMA) is ideal for enhancing capacity by utilizing the same wavelengths for different information transmission. This paper presents a new FSO system based on the combination of orthogonal frequency division multiplexing (OFDM) and OCDMA systems. Three OCDMA channels, employing diagonal permutation shift (DPS) codes, carry 20 Gbps each, modulated by 4-level quadrature amplitude modulation (QAM) and OFDM. To assess performance, the proposed system considers severe climate conditions like rain, fog, and snow. The effectiveness is measured by bit error rate (BER) and received optical power (ROP). In addition, actual meteorological data for the cities of Alexandria, Egypt and Pune, India are evaluated to demonstrate the applicability of the proposed model in a real-world setting. The results reveal successful transmission with an overall capacity of 60 Gbps over a 3600 m FSO range in Alexandria, achieving a 0.27 dBm ROP. In Pune, with higher average rainfall, the maximum FSO link is 2750 m with a −0.06 ROP. Furthermore, the proposed model can propagate up to 850 m under weak turbulence (WT).
AB - Free space optics (FSO) communication systems are preferred due to their high transmission capacity so it can support the ever-increasing volume of online traffic. Optical code division multiple access (OCDMA) is ideal for enhancing capacity by utilizing the same wavelengths for different information transmission. This paper presents a new FSO system based on the combination of orthogonal frequency division multiplexing (OFDM) and OCDMA systems. Three OCDMA channels, employing diagonal permutation shift (DPS) codes, carry 20 Gbps each, modulated by 4-level quadrature amplitude modulation (QAM) and OFDM. To assess performance, the proposed system considers severe climate conditions like rain, fog, and snow. The effectiveness is measured by bit error rate (BER) and received optical power (ROP). In addition, actual meteorological data for the cities of Alexandria, Egypt and Pune, India are evaluated to demonstrate the applicability of the proposed model in a real-world setting. The results reveal successful transmission with an overall capacity of 60 Gbps over a 3600 m FSO range in Alexandria, achieving a 0.27 dBm ROP. In Pune, with higher average rainfall, the maximum FSO link is 2750 m with a −0.06 ROP. Furthermore, the proposed model can propagate up to 850 m under weak turbulence (WT).
KW - Bit error rate (BER)
KW - Free space optics (FSO)
KW - Optical code division multiple access (OCDMA)
KW - Orthogonal frequency division multiplexing (OFDM)
KW - Received optical power (ROP)
UR - http://www.scopus.com/inward/record.url?scp=85164283604&partnerID=8YFLogxK
U2 - 10.1016/j.aej.2023.06.077
DO - 10.1016/j.aej.2023.06.077
M3 - Article
AN - SCOPUS:85164283604
SN - 1110-0168
VL - 77
SP - 15
EP - 29
JO - Alexandria Engineering Journal
JF - Alexandria Engineering Journal
ER -