Infrared and Laser Engineering, Volume. 50, Issue 8, 20200382(2021)
MIMO scheme for underwater wireless optical communication system using PMT array
Underwater wireless optical communication (UWOC) has the characteristics of high bandwidth and low latency, and have become a viable alternative for underwater communication. The transmitter and receiver arrays of this system are composed of six green light emitting diode (LED) and three photomultiplier tube (PMT), respectively, and forming a 6×3 multiple input multiple output (MIMO) transmission mode. This system achieved a 1 Mbps data transmission rate over a distance of 10 m water tank underwater channel. MATLAB was adopted to simulate this underwater channel model and predict the received optical power distribution on the receiving plane and the maximum value is -35.8 dBm. Moreover, the PMT anode output voltage and the cathode current waveform were tested. Derivation and calculation show that the signal-to-noise ratio (SNR) is 19.4 dB, and the bit error rate (BER) is approximately 1.1×10-5. The theoretical minimum received power of the this PMT module can be as low as 1.5×10-9 W, which reflects its extremely high sensitivity. Finally, through Monte Carlo channel simulation, the performance of MIMO is further verified, and the channel capacity of 35 bit·s-1·Hz-1 can be reached at a SNR of 25 dB.
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Jinjia Li, Demao Ye, Linning Wang, Kang Fu, Yongjin Wang. MIMO scheme for underwater wireless optical communication system using PMT array[J]. Infrared and Laser Engineering, 2021, 50(8): 20200382
Category: Optical communication and sensing
Received: Sep. 19, 2020
Accepted: --
Published Online: Nov. 2, 2021
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