Simplified Closed-Form Single-Scatter Path Loss Model of Non-Line-of-Sight Ultraviolet Communications in Noncoplanar Geometry

Cao, Tian; Song, Jian; Pan, Ching‐Tsai

doi:10.1109/jqe.2021.3052196

Cited by 21 publications

(4 citation statements)

References 35 publications

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“…Due to the huge path loss by the multiple-order scattering in the NLOS UVC channel, the received optical power from the first-order scattering could be a hundred times higher than that from the multiple-order scattering, especially in the short-range communications scenarios that NLOS UVC systems are mainly designed to [3], [20], [21], [22]. Therefore, the channel gain of the NLOS UVC systems is dominated by the received optical power via the first-order scattering.…”

Section: A Channel Modelmentioning

confidence: 99%

A Power-Domain MST Scheme With BPPM in NLOS Ultraviolet Communications

Cao

Pan

et al. 2023

IEEE Photonics J.

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Due to the high path loss of non-line-of-sight (NLOS) ultraviolet communications (UVC) channel, pulse modulation schemes, such as on-off keying (OOK) and M-ary pulse-position modulation (PPM), and photon-counting receivers are commonly adopted. Although M-ary PPM can be demodulated and decoded without the channel state information, its spectral efficiency is lower than OOK's. To improve the spectral efficiency of M-ary PPM in NLOS UVC, a power-domain multilayer-superposed transmission (MST) scheme with binary PPM (BPPM) is proposed in this work. Based on this scheme, the signal in each layer can be directly decoded without successive interference cancellation, which is necessary for other MST schemes in the power domain. Hence, a low complexity receiver in the NLOS UVC system can be realized. Additionally, the bit-error rate (BER) and achievable data rate (ADR) expressions of the proposed MST scheme are derived. Monte-Carlo simulations are performed to verify the analytical BER expression. The NLOS UVC system performance employing the proposed MST scheme is further demonstrated and compared with pure BPPM. The results indicate that with the optimal power allocation factor for each layer, the overall ADR of the NLOS UVC system with the proposed power-domain MST scheme can surpass that with pure BPPM.

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Section: A Channel Modelmentioning

confidence: 99%

A Power-Domain MST Scheme With BPPM in NLOS Ultraviolet Communications

Cao

Pan

et al. 2023

IEEE Photonics J.

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“…is the atmospheric scattering coefficient, and k ray s and k mie s are the Rayleigh scattering and Mie scattering coefficients, respectively.f ray Θ (θ i ) and f mie Θ (θ i ) are the phase functions of Rayleigh scattering and Mie scattering, respectively, and the expressions are as follows [4]:…”

Section: Analysis Of Uv Multiple Scattering Based On Improved Mci-pis...mentioning

confidence: 99%

“…In [5], three methods were proposed to accelerate the MCI-PIS model in terms of both convergence speed and computational efficiency. In [4], a new simplified path loss(PL) model is proposed, which can accurately convert the triple integral in the single scattering PL model into a single integral, reducing the computational complexity and improving the effectivenss of the model. Besides, the proposed simplified model is in closed form compared to the spherical crown model.…”

mentioning

confidence: 99%

Analysis of UV Multiple Scattering Based on Improved MCI-PIS Model

et al. 2022

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Wireless ultraviolet communication uses the atmospheric scattering effect for signal transmission, and this paper improves the partially important sampling model (MCI-PIS) in the Monte Carlo integration method, and the improved model is used to simulate the influence of multiple system parameters such as communication distance, transceiver tilt angle, transceiver divergence angle on the path loss and impulse response of ultraviolet light communication.The simulation results show that the path loss of the improved model for multiple scattering of ultraviolet light is increased by 0.2-2dB, and the impulse response is almost the same as that of MCI-PIS, but the calculation effect is increased by 20% compared with the MCI-PIS model. INDEX TERMS UV light communication,Multiple scattering,Monte Carlo,Computational efficiency I. INTRODUCTION W IRELESS ultraviolet communication uses ultraviolet light in the "sun blind" band (200nm − 280nm) as the information carrier and uses the scattering effect of the atmosphere on photons to communicate. It overcomes the disadvantages of free-space optical communication, which requires line-of-sight, and can adapt to more cpmplex environments.It is because of the above advantages of UV light that UV communication has gradually become a hot research topic in the field of optical communication. The unique scattering propagation mode of UV light leads to unique channel model of UV communication. Before applying wireless UV communication system, it is necessary to study the channel model of UV communication and to analysis its performance under different system parameters.

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“…where f H (η; d) = f H,LN (η; d) is given in (11) for LN distribution and f H (η; d) = f H,GG (η; d) is given in (13) for GG distribution.…”

Section: B Receiving Power Considering Turbulent Fluctuationmentioning

confidence: 99%

Monte-Carlo Integration Models for Multiple Scattering Based Optical Wireless Communication

Yuan

et al. 2020

IEEE Trans. Commun.

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Modeling of multiple-scattering channels in atmospheric turbulence is essential for the performance analysis of long-distance non-line-of-sight (NLOS) ultraviolet (UV) communications. Existing works on the turbulent channel modeling for NLOS UV communications either ignored the turbulence-induced scattering effect or erroneously estimated the turbulent fluctuation effect, resulting in a contradiction with reported experiments. In this paper, we establish a comprehensive multiple-scattering turbulent channel model for NLOS UV communications considering both the turbulence-induced scattering effect and the turbulent fluctuation effect. We first derive the turbulent scattering coefficient and turbulent phase scattering function based on the Booker-Gordon turbulent power spectral density model. Then an improved estimation method is proposed for both the turbulent fluctuation and the turbulent fading coefficient based on the Monte-Carlo integration approach. Numerical results demonstrate that the turbulence-induced scattering effect can always be ignored for typical UV communication scenarios.Besides, the turbulent fluctuation will increase as either the communication distance, the elevation angle, or the divergence angle increases, which is compatible with existing experimental results. Moreover, we find that the probability density of the equivalent turbulent fading for multiple-scattering turbulent channels can be approximated as a Gaussian distribution.

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Simplified Closed-Form Single-Scatter Path Loss Model of Non-Line-of-Sight Ultraviolet Communications in Noncoplanar Geometry

Cited by 21 publications

References 35 publications

A Power-Domain MST Scheme With BPPM in NLOS Ultraviolet Communications

A Power-Domain MST Scheme With BPPM in NLOS Ultraviolet Communications

Analysis of UV Multiple Scattering Based on Improved MCI-PIS Model

Monte-Carlo Integration Models for Multiple Scattering Based Optical Wireless Communication

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