TY - JOUR
T1 - The effect of turbulence on NLOS underwater wireless optical communication channels [Invited]
AU - Sait, Mohammed
AU - Sun, Xiaobin
AU - Alkhazragi, Omar
AU - Alfaraj, Nasir
AU - Kong, Meiwei
AU - Ng, Tien Khee
AU - Ooi, Boon S.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): BAS/1/1614-01-01, GEN/1/6607-01-01
Acknowledgements: This work was supported by the King Abdullah University of Science and Technology (KAUST) (baseline funding, BAS/1/1614-01-01, KAUST funding KCR/1/ 2081-01-01, and GEN/1/6607-01-01). T.K.N. and B.S.O. gratefully acknowledge funding from King Abdulaziz City for Science and Technology (KACST) Grant KACST TIC R2-FP-008.
PY - 2019/11/18
Y1 - 2019/11/18
N2 - Conventional line-of-sight underwater wireless optical communication (UWOC) links suffer from huge signal fading in the presence of oceanic turbulence due to misalignment, which is caused by variations in the refractive index in the water. Non-line-of-sight (NLOS) communication, a novel underwater communication configuration, which has eased the requirements on the alignment, is supposed to enhance the robustness of the UWOC links in the presence of such turbulence. This Letter experimentally and statistically studies the impact of turbulence that arises from temperature gradient variations and the presence of different air bubble populations on NLOS optical channels. The results suggest that temperature gradient-induced turbulence causes negligible signal fading to the NLOS link. Furthermore, the presence of air bubbles with different populations and sizes can enhance the received signal power by seizing the scattering phenomena from an ultraviolet 377 nm laser diode.
AB - Conventional line-of-sight underwater wireless optical communication (UWOC) links suffer from huge signal fading in the presence of oceanic turbulence due to misalignment, which is caused by variations in the refractive index in the water. Non-line-of-sight (NLOS) communication, a novel underwater communication configuration, which has eased the requirements on the alignment, is supposed to enhance the robustness of the UWOC links in the presence of such turbulence. This Letter experimentally and statistically studies the impact of turbulence that arises from temperature gradient variations and the presence of different air bubble populations on NLOS optical channels. The results suggest that temperature gradient-induced turbulence causes negligible signal fading to the NLOS link. Furthermore, the presence of air bubbles with different populations and sizes can enhance the received signal power by seizing the scattering phenomena from an ultraviolet 377 nm laser diode.
UR - http://hdl.handle.net/10754/660453
UR - http://www.clp.ac.cn/EN/Article/OJ513b2ce0c2cb9fc
UR - http://www.scopus.com/inward/record.url?scp=85075123913&partnerID=8YFLogxK
U2 - 10.3788/COL201917.100013
DO - 10.3788/COL201917.100013
M3 - Article
SN - 1671-7694
VL - 17
SP - 100013
JO - Chinese Optics Letters
JF - Chinese Optics Letters
IS - 10
ER -