Symbol-level fiber-longitudinal power profile estimation
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View abstract on PubMed
Summary
This summary is machine-generated.Symbol-level power profile estimation (PPE) in optical systems is complex. A new matrix calibration method improves accuracy by accounting for inter-sample interactions, reducing errors in power estimation.
Area Of Science
- Optical communications
- Signal processing
Background
- Symbol-level power profile estimation (PPE) offers reduced complexity over waveform-level PPE.
- However, symbol-rate data lacks inter-sample interaction information, causing absolute power estimation inaccuracies.
Purpose Of The Study
- To analyze the discrepancies between symbol-level and waveform-level perturbation matrices.
- To propose an accurate symbol-level PPE method using matrix calibration.
Main Methods
- In-depth analysis of symbol-level vs. waveform-level perturbation matrices.
- Development of a power calibration technique utilizing the trace of the inverse matrix.
Main Results
- Evaluated on probabilistic constellation shaping (PCS) 64QAM 130 Gbaud links (5 × 50 km).
- Matrix calibration reduced root mean squared error (RMSE) by 0.98 dB at EDFA positions.
- RMSE decreased by 0.62 dB across all estimated positions.
Conclusions
- The proposed matrix calibration method significantly enhances the accuracy of symbol-level PPE.
- This technique addresses the limitations of symbol-rate data in power estimation for optical systems.
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