首页|Real-time UWOC miniaturized system based on FPGA and LED arrays and its application in MIMO
Real-time UWOC miniaturized system based on FPGA and LED arrays and its application in MIMO
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维普
In order to alleviate the impact of turbulence on the performance of underwater wireless optical communication[UWOC]in real time,and achieve high-speed real-time transmission and low cost and miniaturization of equipment,a 2 × 2 real-time multiple-input and multiple-output[MIMO]high-speed miniaturized UWOC system based on a field-programmable gate array[FPGA]and a high-power light-emitting diode[LED]array is designed in this Letter.In terms of multiplexing gain,the imaging MIMO spatial multiplexing and high-order modulation for the first time are combined and the real-time high-speed transmission of PAM-4 signal based on the LED array light source in 12 m underwater channel at 100 Mbps rate is implemented,which effectively improves the throughput of the UWOC system with a high-power commercial LED light source.In light of diversity gain,the system employs the diversity of repeated coding scheme to receive two identical non-return-to-zero on-off keying[NRZ-OOK]signals,which can compensate the fading or flickering sublinks in real time under the bubble-like simulated turbulence condition,and has high robustness.To our knowledge,this is the first instance of a high rate and long-distance implementation of a turbulence-resistant real-time MIMO miniaturized UWOC system based on FPGA and high-power LED arrays.With spatial diversity or spatial multiplexing capabilities,its low cost,integrity,and high robustness provide the system with important practical prospects.
万方数据
维普
