TY - JOUR
T1 - Feedback-Free Adaptive Modulation Selection Algorithm for FSO Systems
AU - Elamassie, Mohammed
AU - Uysal, Murat
N1 - Funding Information:
Manuscript received May 11, 2021; accepted June 7, 2021. Date of publication June 14, 2021; date of current version September 9, 2021. This work of Murat Uysal was supported by the Turkish Scientific and Research Council under Grant 120E312. The associate editor coordinating the review of this article and approving it for publication was V. Bhatia. (Corresponding author: Mohammed Elamassie.) The authors are with the Department of Electrical and Electronics Engineering, Özyegˇin University, 34794 Istanbul, Turkey (e-mail: [email protected]; [email protected]). Digital Object Identifier 10.1109/LWC.2021.3088871
Publisher Copyright:
© 2012 IEEE.
PY - 2021/9
Y1 - 2021/9
N2 - Free space optical (FSO) communication systems experience turbulence-induced fading. As a possible solution to mitigate the effects of fading, adaptive transmission that allows the adjustment of transmission parameters such as transmit power and modulation size can be used. Most of the existing works on adaptive FSO systems assume the presence of full channel state information (CSI) at the transmitter side. In practice, incomplete/outdated CSI may prevent the complete extraction of the theoretical gain expected from adaptive systems. In this letter, to avoid the difficulties associated with feedback, we propose a feedback-free adaptive modulation selection algorithm for FSO systems. We formulate the design as an optimization problem where average throughput is maximized by selecting the largest modulation order under the constraint that the required transmit power for a targeted bit error rate (BER) value does not exceed the maximum transmit power. We further present numerical results to confirm the superiority of the proposed adaptive algorithm.
AB - Free space optical (FSO) communication systems experience turbulence-induced fading. As a possible solution to mitigate the effects of fading, adaptive transmission that allows the adjustment of transmission parameters such as transmit power and modulation size can be used. Most of the existing works on adaptive FSO systems assume the presence of full channel state information (CSI) at the transmitter side. In practice, incomplete/outdated CSI may prevent the complete extraction of the theoretical gain expected from adaptive systems. In this letter, to avoid the difficulties associated with feedback, we propose a feedback-free adaptive modulation selection algorithm for FSO systems. We formulate the design as an optimization problem where average throughput is maximized by selecting the largest modulation order under the constraint that the required transmit power for a targeted bit error rate (BER) value does not exceed the maximum transmit power. We further present numerical results to confirm the superiority of the proposed adaptive algorithm.
KW - Free space optical communication
KW - atmospheric turbulence-induced fading
KW - feedback-free adaptive transmission
KW - weak turbulence conditions
UR - http://www.scopus.com/inward/record.url?scp=85112171325&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85112171325&partnerID=8YFLogxK
U2 - 10.1109/LWC.2021.3088871
DO - 10.1109/LWC.2021.3088871
M3 - Article
AN - SCOPUS:85112171325
SN - 2162-2337
VL - 10
SP - 1964
EP - 1968
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 9
M1 - 9453397
ER -