Yangyang Deng, Yuehui Wang, Yiqing Zhang, Axin Du, Jianguo Liu. The realization of a wide-angle voice transmission non-line-of-sight ultraviolet communication system[J]. Journal of Semiconductors, 2021, 42(9): 092301
- Journal of Semiconductors
- Vol. 42, Issue 9, 092301 (2021)
Fig. 1. (Color online) The work flow of voice transmission NLOS UV communication system at the transmitter and the receiver.
Fig. 2. The transmittance property of the filter, with the characteristics of band-pass from 256 to 280 nm, which is friendly to the communication band of 272 nm.
Fig. 3. The output of PMT shows the pulse pattern when it captures one photon.
Fig. 4. When the transmitter starts signaling, the typical waveform output by the receiver shows the background noise and pulse signal.
Fig. 5. Outfield test on the output waveform after the 2-stage TIA of the receiver under solar background radiation in a clear weather.
Fig. 6. The waveform of the signal received on the ADC at the distance of (a) 200 m, (b) 225 m, (c) 235 m and (d) 250 m. With the increase of Tx and Rx distance, the number of photons received by the receiver decreases, resulting in the decrease of the number of pulses detected.
Fig. 7. With the deviation of the transmitter’s transmission angle, the BER of the system increases.
Fig. 8. With a higher average number of detected photons in symbol 1, the transmission performance reveals better property and a reduced BER.
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