Lijie Zhang, Qi Sui. Dynamic Probabilistic Shaping Technique Based on Intensity Modulation Direct Detection System[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2306005
- Laser & Optoelectronics Progress
- Vol. 58, Issue 23, 2306005 (2021)
Fig. 1. Basic flowchart of probability shaping
Fig. 2. Designed flowchart of probability shaping algorithm
Fig. 3. Concrete steps of probability shaping algorithm based on PAM4 signal
Fig. 4. Designed flowchart of dynamic probabilistic shaping algorithm
Fig. 5. Constellation, eye diagram, and probability distribution of UD-PAM4 and DPS-PAM4 signals. (a) Constellation; (b) eye diagram; (c) probability distribution
Fig. 6. Constellation, eye diagram, and probability distribution of UD-PAM8 and DPS-PAM8 signals. (a) Constellation; (b) eye diagram; (c) probability distribution
Fig. 7. Eye diagrams of DPS-PAM4 and DPS-PAM8 with different table number lookups
Fig. 8. Bit error rate curves of UD-PAM4 and DPS-PAM4
Fig. 9. Bit error rate curves of UD-PAM8 and DPS-PAM8
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Table 1. All cases in output four consecutive symbols
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