Mingjun Wang, Sikai Tu. Performance Research on Underwater Vortex Optical Multiplexing System Based on Back Propagation Neural Network Blind Equalization Algorithm[J]. Laser & Optoelectronics Progress, 2023, 60(17): 1701001
- Laser & Optoelectronics Progress
- Vol. 60, Issue 17, 1701001 (2023)
Fig. 1. Vortex optical multiplexing communication system based on BP blind equalization algorithm in ocean turbulence channel
Fig. 2. Structure diagram of BP neural network
Fig. 3. Constellation diagram of system received signal. (a) Without BP blind equalization algorithm; (b) after using BP blind equalization algorithm
Fig. 4. Variation curve of system mean square error (MSE) with iteration step using BP blind equalization algorithm
Fig. 5. Variation trend of system BER with SNR under different turbulence intensities
Fig. 6. Variation trend of system BER with SNR under different transmission distances and temperature salinity gradient rates
Fig. 7. BER diagram of system before and after equalization when transmission distance and temperature salinity gradient rate are different
Fig. 8. Variation trend of BER with SNR of different OAM multiplexing state sets under medium turbulence intensity
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