Performance evaluation of LOS and NLOS vertical inhomogeneous links in underwater visible light communications

Name: Performance evaluation of LOS and NLOS vertical inhomogeneous links in underwater visible light communications
Author: Anous, N., Abdallah, M., Uysal, Murat

İsim	Performance evaluation of LOS and NLOS vertical inhomogeneous links in underwater visible light communications
Yazar	Anous, N., Abdallah, M., Uysal, Murat
Basım Tarihi:	2018-03-22
Basım Yeri	- IEEE
Konu	BER, Energy efficient, Inhomogeneous, Light focusing, Link budget, Power saving, Stratified layers, Tx orientation, Underwater (UW), VLC
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	2169-3536
Kayıt Numarası	38536d76-5b27-4384-889c-e53330aa62d2
Lokasyon	Electrical & Electronics Engineering
Tarih	2018-03-22
Notlar	NPRP award from the Qatar National Research Fund (Qatar Foundation)
Örnek Metin	In this paper, underwater visible light communication (UWVLC) vertical links are modeled and evaluated, taking account of the inhomogeneous nature of underwater (UW) environment. An equivalent simplified model of stratified N layers is employed in which variations in refractive index and attenuation profiles across UW depth are considered. A generalized path loss expression is deduced which allows estimation of the vertical link loss prior to link design. Mathematical expressions of the received power for line-of-sight (LOS) and non-line-of-sight (NLOS) links between transmitters (Tx) and receivers are deduced. We evaluate the performance by computing the received power and bit error rate for inhomogeneous underwater links. Numerical examples are used to illustrate the proposed models. Deviations from expected results when considering a homogeneous underwater model are discussed. A simple underwater bilayer model is then introduced, which is considered a rough approximate model in comparison to the stratified N layers model. This model assists in estimating the UW link behavior without extensive calculations. The conditions necessary for applying this model are discussed and justified. Moreover, the effects of Tx orientation along with narrowing the transmitted light cone on LOS and NLOS vertical links are examined. A Tx power saving of 30%-50% in UWVLC links is proved to be achieved by rotating the Tx and narrowing its emitted light cone.
DOI	10.1109/ACCESS.2018.2815743
Cilt	6

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Performance evaluation of LOS and NLOS vertical inhomogeneous links in underwater visible light communications

Yazar Anous, N., Abdallah, M., Uysal, Murat

Basım Tarihi 2018-03-22

Basım Yeri - IEEE

Konu BER, Energy efficient, Inhomogeneous, Light focusing, Link budget, Power saving, Stratified layers, Tx orientation, Underwater (UW), VLC

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 2169-3536

Kayıt Numarası 38536d76-5b27-4384-889c-e53330aa62d2

Lokasyon Electrical & Electronics Engineering

Tarih 2018-03-22

Notlar NPRP award from the Qatar National Research Fund (Qatar Foundation)

Örnek Metin In this paper, underwater visible light communication (UWVLC) vertical links are modeled and evaluated, taking account of the inhomogeneous nature of underwater (UW) environment. An equivalent simplified model of stratified N layers is employed in which variations in refractive index and attenuation profiles across UW depth are considered. A generalized path loss expression is deduced which allows estimation of the vertical link loss prior to link design. Mathematical expressions of the received power for line-of-sight (LOS) and non-line-of-sight (NLOS) links between transmitters (Tx) and receivers are deduced. We evaluate the performance by computing the received power and bit error rate for inhomogeneous underwater links. Numerical examples are used to illustrate the proposed models. Deviations from expected results when considering a homogeneous underwater model are discussed. A simple underwater bilayer model is then introduced, which is considered a rough approximate model in comparison to the stratified N layers model. This model assists in estimating the UW link behavior without extensive calculations. The conditions necessary for applying this model are discussed and justified. Moreover, the effects of Tx orientation along with narrowing the transmitted light cone on LOS and NLOS vertical links are examined. A Tx power saving of 30%-50% in UWVLC links is proved to be achieved by rotating the Tx and narrowing its emitted light cone.

DOI 10.1109/ACCESS.2018.2815743

Cilt 6