Analysis on the Effects of Atmospheric Turbulence on Line-of-Sight Ultraviolet Communication System Performance

2014 ◽  
Vol 1014 ◽  
pp. 102-105
Author(s):  
Yong Wang ◽  
Meng Ying Su
Keyword(s):  
Information Transmission ◽  
Atmospheric Turbulence ◽  
Turbulence Intensity ◽  
Communication System ◽  
Transmission Rate ◽  
Optical Signals ◽  
Communication System Performance ◽  
Intensity Changes ◽  
Ultraviolet Communication ◽  
Ber Performance

In the ultraviolet communication system, optical signals being transmitted are not only attenuated in energy, but also affected by the atmospheric turbulence. The effects of atmospheric turbulence intensity and information transmission rate on the BER performance of UV communication system are analyzed and simulated in this paper. It can be found that when the atmospheric turbulence intensity changes from weak to strong, the BER performance deteriorates along, and under the certain atmospheric turbulence intensity, information transmission rate will also have an impact on the system BER performance, the information transmission rate becomes faster, the BER performance gets worse.

The Study on Non-Line-of-Sight Ultraviolet Communication System in the Atmospheric Turbulence

2014 ◽  
Vol 668-669 ◽  
pp. 1335-1338 ◽  
Author(s):  
Yong Wang
Keyword(s):  
Atmospheric Turbulence ◽  
Communication System ◽  
Optical Power ◽  
Intensity Modulation ◽  
Line Of Sight ◽  
Turbulence Effect ◽  
Simulation Results ◽  
Ultraviolet Communication ◽  
Ber Performance ◽  
Non Line Of Sight

In the atmospheric turbulence, the effects of atmospheric turbulence and transmitted optical power on the BER performance of ultraviolet communication system are analyzed and simulated. The simulation results show that when the atmospheric turbulence strength changes from weak to strong, the BER performance deteriorates along. Compared to OOK intensity modulation, the BPSK subcarrier intensity modulation can be more effectively to inhibit atmospheric turbulence effect on ultraviolet communication system. Under the certain atmospheric turbulence strength, the BER performance of ultraviolet communication system will be improved along with the increase of the transmitted optical power.

Performance Analysis of Ultraviolet Communication System in Fog Environment

2013 ◽  
Vol 441 ◽  
pp. 920-923
Author(s):  
Yong Wang ◽  
Xue Mei Bi
Keyword(s):  
Performance Indicators ◽  
Communication System ◽  
Channel Model ◽  
Transmission Rate ◽  
Optical Power ◽  
Single Scattering ◽  
Signal Attenuation ◽  
Performance Deterioration ◽  
Simulation Results ◽  
Ultraviolet Communication

Based on the analysis of ultraviolet single scattering channel model, the attenuation model of fog and its impact on signal attenuation is investigated. Under foggy environment, the study on the performance of ultraviolet communications is carried, simulation results show that the fog will not only make ultraviolet communication system BER performance deterioration, but also make information transmission rate substantially lowered. In addition, to guarantee a certain system performance indicators, the average transmitted optical power will have higher requirements.

scholarly journals Laboratory Measurements of the Influence of Turbulence Intensity on the Instantaneous-Fading Reciprocity of Bidirectional Atmospheric Laser Propagation Link

2021 ◽  
Vol 11 (8) ◽  
pp. 3499
Author(s):  
Yi Liu ◽  
Zhi Liu ◽  
Yidi Chang ◽  
Yang Liu ◽  
Huilin Jiang
Keyword(s):  
Correlation Coefficient ◽  
Atmospheric Turbulence ◽  
Turbulence Intensity ◽  
Optical Signal ◽  
Optical Channel ◽  
Optical Signals ◽  
Optical Channels ◽  
Laser Propagation ◽  
Hot Air ◽  
Air Convection

The reciprocity of the atmospheric turbulence channel in the bidirectional atmospheric laser propagation link is experimentally tested. The bidirectional transceiving coaxial atmospheric laser propagation link is built by using a hot air convection-type atmospheric turbulence emulation device with adjustable turbulence intensity. The influence of different turbulence intensities on the instantaneous-fading correlation of channel is analyzed by the spot characteristics. When there is no atmospheric turbulence in the bidirectional transceiving coaxial atmospheric laser propagation link, the value of channel instantaneous fading correlation coefficient was merely 0.023, which indicates we did not find any reciprocity in the optical channel. With the increment in turbulence intensity, the channel instantaneous fading correlation coefficient presented a constant increasing trend and then tended to be stable around 0.9 in the end. At this moment, the similarity of the instantaneous change trends for these two receiving terminal optical signals, and the consistency of their probability density function, indicates that there is good reciprocity between the bidirectional atmospheric turbulence optical channels. With the increase in the optical signal scintillation factor, we can obtain the result where the correlation coefficient value decreases accordingly.

Application of Power Communication System in Wind Power Plant

2013 ◽  
Vol 724-725 ◽  
pp. 655-658
Author(s):  
Rui Jing Shi ◽  
Xiao Chao Fan ◽  
Feng Ting Li ◽  
Bo Wei
Keyword(s):  
Wireless Communication ◽  
Wind Power ◽  
Communication System ◽  
Transmission Rate ◽  
Wind Farms ◽  
Optical Fiber Communication ◽  
Total System ◽  
Fiber Communication ◽  
Network Transmission ◽  
Cable Communication

The application of power communication system in the field of wind power mainly includes the overall system communication and local field communication. During the operation of wind farms, the total system requires that the electric power communication system should provide reliable rapid information channel, accuracy of transmission on a variety of digital business. This article will focus on the application of power communication system between the wind turbine and the booster station, which includes optical fiber communication, communication and leased public circuit, as well as the cable communication, wireless communication, microwave wireless communication. Finally, in the premise of various communications comparison, according to the actual situation of the wind power field, the network transmission rate and reliability should be considered to the requirements of power market.

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