TY - GEN
T1 - Error Performance of Relay-Assisted Free-Space Optical Communication Links Over Atmospheric Turbulence Channels
AU - Ara, Rahat
AU - Lee, It Ee
AU - Ghassemlooy, Zabih
AU - Chung, Gwo Chin
AU - Pang, Wai Leong
N1 - Funding Information: This research project is supported by the Multimedia University (MMU) Graduate Research Assistant (GRA) Scheme (MMUI/190009) and the Ministry of Higher Education (MOHE) under the Fundamental Research Grant Scheme (FRGS/1/2020/ TK0/MMU/03/8).
PY - 2023/9/1
Y1 - 2023/9/1
N2 - Free-space optical (FSO) communication has regained substantial research interests in the recent decade and is well reckoned as a viable alternative which is highly complementary/integrable with existing radio frequency (RF) solutions, such as the 5G wireless networks. Unpredictable weather conditions severely impair the link availability and performance of the FSO system. The presence of atmospheric loss and turbulence-induced optical scintillation within the communication channel causes attenuation and random fluctuation of the received optical signals, thereby limiting the link distance and impairing the error performance. Multi-hop relaying technique can be adopted in the FSO system for improving the channel gain and mitigating the turbulence-induced channel fading. In this paper, we examine the bit error rate (BER) performances of FSO systems operating in the single-input single-output (SISO) and multi-hop relay-based configurations. The BER analysis is carried out using MATLAB simulation, whereby weather-dependent parameters and turbulence strength values for different weather scenarios such as clear air, light fog, and haze are considered here. Next, the aperture-averaging phenomenon caused by the receiver aperture dimension is jointly investigated with the relay-assisted multi-hop relaying technique. From our study, it is evident that the SISO FSO configuration is vulnerable to system outage, which can be effectively mitigated with the introduction of relay terminals. Our findings conclude that the relay-assisted multi-hop FSO system with aperture averaging is a feasible approach toward reducing the BER performance with minimum power requirement.
AB - Free-space optical (FSO) communication has regained substantial research interests in the recent decade and is well reckoned as a viable alternative which is highly complementary/integrable with existing radio frequency (RF) solutions, such as the 5G wireless networks. Unpredictable weather conditions severely impair the link availability and performance of the FSO system. The presence of atmospheric loss and turbulence-induced optical scintillation within the communication channel causes attenuation and random fluctuation of the received optical signals, thereby limiting the link distance and impairing the error performance. Multi-hop relaying technique can be adopted in the FSO system for improving the channel gain and mitigating the turbulence-induced channel fading. In this paper, we examine the bit error rate (BER) performances of FSO systems operating in the single-input single-output (SISO) and multi-hop relay-based configurations. The BER analysis is carried out using MATLAB simulation, whereby weather-dependent parameters and turbulence strength values for different weather scenarios such as clear air, light fog, and haze are considered here. Next, the aperture-averaging phenomenon caused by the receiver aperture dimension is jointly investigated with the relay-assisted multi-hop relaying technique. From our study, it is evident that the SISO FSO configuration is vulnerable to system outage, which can be effectively mitigated with the introduction of relay terminals. Our findings conclude that the relay-assisted multi-hop FSO system with aperture averaging is a feasible approach toward reducing the BER performance with minimum power requirement.
KW - Atmospheric turbulence
KW - Bit error rate (BER)
KW - Free-space optical (FSO) communication
KW - Optical relaying
UR - https://www.scopus.com/pages/publications/85174720021
U2 - 10.1007/978-981-99-3043-2_3
DO - 10.1007/978-981-99-3043-2_3
M3 - Conference contribution
AN - SCOPUS:85174720021
SN - 9789819930425
T3 - Lecture Notes in Networks and Systems
SP - 25
EP - 37
BT - Proceedings of 8th International Congress on Information and Communication Technology
A2 - Yang, Xin-She
A2 - Sherratt, R. Simon
A2 - Dey, Nilanjan
A2 - Joshi, Amit
PB - Springer
CY - Singapore
T2 - 8th International Congress on Information and Communication Technology, ICICT 2023
Y2 - 20 February 2023 through 23 February 2023
ER -