Jianlei ZHANG, Xiang LAN, Yi YANG, Fengtao HE, Yunzhou ZHU. Adaptive stochastic resonance detection of weak light signal in underwater laser communication[J]. Optics and Precision Engineering, 2022, 30(12): 1383
- Optics and Precision Engineering
- Vol. 30, Issue 12, 1383 (2022)
Fig. 1. UOWC optical signal transmission model
Fig. 2. Bistable stochastic resonance potential function
Fig. 3. Effect of parameter a ，b on the potential function U （x ）
Fig. 4. Effect of parameter a ，b on the system threshold A c
Fig. 5. Secondary sampling stochastic resonance
Fig. 6. Large parameter signal stochastic resonance
Fig. 7. Bipolar signal with Gaussian white noise processed by CFACA-ASR system（SNR =- 20 dB）
Fig. 8. ACA algorithm convergence graph
Fig. 9. CFACA algorithm convergence graph
Fig. 10. Bit error rate of different detection schemes
Fig. 11. CFACA-ASR error rate under different sampling points
Fig. 12. UOWC experimental system
Fig. 13. Experimental data collected based on CFACA-ASR system processing（SNR =- 4.559 5 dB）
Fig. 14. Experimental results of different detection schemes
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Table 1. Bit error rate comparison of different training sequence lengths under different SNR
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