Yi YANG, Jiayuan LEI, Xiaobo WANG, Fengtao HE, Yan LIU, Huan NIE. Performance of OQPSK Modulation System Based on Composite Seawater Channel[J]. Acta Photonica Sinica, 2022, 51(10): 1006006
- Acta Photonica Sinica
- Vol. 51, Issue 10, 1006006 (2022)
Fig. 1. The block diagram of the UWOC system with OQPSK modulation scheme
Fig. 2. Demodulation schematic of OQPSK
Fig. 3. Schematic of beam expansion
Fig. 4. Flowchart of acceptance-rejection sampling algorithm
Fig. 5. EGG distribution probability density function diagram and random noise histogram
Fig. 6. Comparison of BER performance of OQPSK modulation system in composite channels with different turbulence intensity
Fig. 7. Comparison of BER performance of different modulations in composite channels
Fig. 8. OQPSK-UWOC system transmission model
Fig. 9. OQPSK modulation signal through different channel
Fig. 10. Comparison of OQPSK signal waveform of different turbulence coherence time
Fig. 11. Comparison of BER performance for different coherent time in composite channels
Fig. 12. Comparison of BER performance for different transmission distances and turbulence intensities in composite channels
Fig. 13. Comparison of BER performance for different transmission distances in composite channels
Fig. 14. Comparison of BER performance for different noise power in composite channels
Fig. 15. Comparison of BER performance for different water quality in composite channels
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Table 1. Attenuation coefficients for different water quality［22］
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Table 2. Simulation system parameters
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