TY - JOUR
T1 - Vertical Underwater Visible Light Communication Links
T2 - Channel Modeling and Performance Analysis
AU - Elamassie, Mohammed
AU - Uysal, Murat
N1 - Funding Information:
Manuscript received April 9, 2020; revised June 22, 2020; accepted June 27, 2020. Date of publication July 14, 2020; date of current version October 9, 2020. The work of Murat Uysal was supported by the Turkish Scientific and Research Council under Grant 215E119. This article was presented in part at the International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP’18), Budapest, Hungary, in July 2018, and in part at the 8th 2018 IEEE GLOBECOM Workshop on Optical Wireless Communications (GC’18 WS - OWC), Abu Dhabi, United Arab Emirates. The associate editor coordinating the review of this article and approving it for publication was L. Bai. (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]).
Publisher Copyright:
© 2002-2012 IEEE.
PY - 2020/10
Y1 - 2020/10
N2 - Underwater visible light communication (UVLC) has been introduced to support emerging high data rate applications such as real-time image and video transmission. Initial works on UVLC build upon the assumption of fixed turbulence strength through the transmission range which can be justified only for horizontal links. In vertical underwater links, the gradient of temperature and salinity changes with depth. This effectively results in ocean stratification where water with different values of salinity and temperature form non-mixing layers. In this paper, we first model the vertical underwater link as a cascaded fading channel where fading coefficients associated with different layers are modeled as independent and non-identical distributed. Based on the cascaded lognormal and Gamma-Gamma distributions respectively for weak and moderate/strong turbulence conditions, we first derive closed-form expressions for the bit error rate (BER) performance of UVLC systems. Then, we analyze the asymptotic BER performance and determine the diversity orders. In addition, we derive closed-form expressions for the average ergodic capacity of underwater cascaded fading channels under consideration. We present simulation results to confirm the analytical findings.
AB - Underwater visible light communication (UVLC) has been introduced to support emerging high data rate applications such as real-time image and video transmission. Initial works on UVLC build upon the assumption of fixed turbulence strength through the transmission range which can be justified only for horizontal links. In vertical underwater links, the gradient of temperature and salinity changes with depth. This effectively results in ocean stratification where water with different values of salinity and temperature form non-mixing layers. In this paper, we first model the vertical underwater link as a cascaded fading channel where fading coefficients associated with different layers are modeled as independent and non-identical distributed. Based on the cascaded lognormal and Gamma-Gamma distributions respectively for weak and moderate/strong turbulence conditions, we first derive closed-form expressions for the bit error rate (BER) performance of UVLC systems. Then, we analyze the asymptotic BER performance and determine the diversity orders. In addition, we derive closed-form expressions for the average ergodic capacity of underwater cascaded fading channels under consideration. We present simulation results to confirm the analytical findings.
KW - Underwater visible light communication
KW - diversity order
KW - error rate performance
KW - underwater turbulence
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U2 - 10.1109/TWC.2020.3007343
DO - 10.1109/TWC.2020.3007343
M3 - Article
AN - SCOPUS:85093663635
SN - 1536-1276
VL - 19
SP - 6948
EP - 6959
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 10
M1 - 9140399
ER -