Abstract
This paper mainly studies the communication performance of visible light communication link in fire smoke environment. Compared with the previous studies, this study no longer only considers a single wavelength and considers the influence of smoke and background light noise. Firstly, the variation of background light noise caused by sunlight during a day was analyzed, then signal-to-noise ratio (SNR) and bit error rate (BER) of the visible light communication link in fire smoke environment with different visibility were calculated, and finally, the variation of received power with the angle β between the LED optical axis and the communication link (from LED to receiver) was analyzed. The results show that, during a day from 07:00 to 18:30, background light noise first increases and then decreases, BER changes in the same trend and reaches the maximum at about 13:00, while SNR changes in the opposite trend and reaches the minimum at about 13:00. When visibility is 100 m, the maximum difference of SNR between 7:00 and 13:00 is about 19 dB, and the maximum difference of BER is about 5.3E-10. At 7:00, the maximum difference of SNR is about 13 dB between the visibility of 1 m and the visibility of 100 m, and the maximum difference of BER is about 1.44E − 11, and received power decreases with the increase of β. In addition, SNR increases with visibility of fire smoke environment, and BER changes in the opposite trend. Lastly, in order to enhance the performance of visible light communication in fire smoke environment, this paper gives the transmitting power scheme.
Highlights
The application of visible light communication (VLC) is becoming more and more widespread. e new visible light communication technology based on LED has many advantages: it can meet high-speed communication while realizing lighting, is harmless to human eye health and does not cause radiation damage to the human body, is not subject to electromagnetic interference, and has good confidentiality
The outdoor rain, fog, snow, and background light noise are important factors to interfere with the visible light communication link
We focus on analyzing the performance of visible light communication link in fire smoke environment and provide a theoretical basis for the application of visible light communication in this environment in the future
Summary
Analysis of Visible Light Communication Link’s Performance in Fire Smoke Environment. Is paper mainly studies the communication performance of visible light communication link in fire smoke environment. E results show that, during a day from 07:00 to 18:30, background light noise first increases and decreases, BER changes in the same trend and reaches the maximum at about 13:00, while SNR changes in the opposite trend and reaches the minimum at about 13:00. At 7:00, the maximum difference of SNR is about 13 dB between the visibility of 1 m and the visibility of 100 m, and the maximum difference of BER is about 1.44E − 11, and received power decreases with the increase of β. SNR increases with visibility of fire smoke environment, and BER changes in the opposite trend. In order to enhance the performance of visible light communication in fire smoke environment, this paper gives the transmitting power scheme
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