Wavelength Reuse in a Symmetrical Radio Over WDM-PON Based on Polarization Multiplexing and Coherent Detection With Digital Phase Noise Cancellation
Bibliographic record
Abstract
A symmetrical radio over a colorless WDM-PON with wavelength reuse based on polarization multiplexing and coherent detection incorporating digital phase noise cancellation is proposed and demonstrated. For the downlink, two optical signals are intensity-modulated by two 16-QAM downstream microwave vector signals that are polarization multiplexed at the optical line terminal (OLT). The two signals are transmitted to the optical network unit (ONU). At the ONU, one orthogonally polarized optical signal is reused for uplink transmission. One portion of the reused optical signal is phase-modulated by a 16-QAM upstream microwave vector signal, while the other portion is intensity-modulated by another 16-QAM upstream microwave vector signal. Again, the two portions of the optical signals are polarization multiplexed and transmitted back to the OLT. At the OLT, a coherent receiver with digital signal processing (DSP) is used to detect the upstream optical signals. Two DSP algorithms are developed to recover the 16-QAM upstream microwave vector signals. The transmission of two 2.5-Gbps 16-QAM downstream microwave signals and two 2.5-Gbps 16-QAM upstream microwave signals over a 10.5-km single-mode fiber is experimentally demonstrated. The error vector magnitudes (EVMs) for the downstream and the upstream signals are measured to be 7.3%, and 8.65%.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".