Wavelength Reuse in an RoF Link Based on CS-DSB, Coherent Detection and DSP
Bibliographic record
Abstract
Wavelength reuse in a bidirectional radio over fiber link based on carrier-suppressed double-sideband (CS-DSB) modulation, coherent detection, and digital signal processing (DSP) is proposed and experimentally demonstrated. At the center office, an optical single-sideband with carrier (OSSB+C) signal is generated and distributed to the base station. The wavelength reuse at the base station is implemented by directly modulating the downstream OSSB+C signal with an upstream signal based on CS-DSB modulation. The modulated upstream signal is sent to the center office where a coherent receiver and a DSP unit are used to recover the upstream signal by eliminating the crosstalk from the downstream signal, and at the same time, to cancel the phase noise from the laser source. An experiment is performed. The transmission of a 16-QAM downstream microwave vector signal and a 16-QAM upstream microwave vector signal over a 17-km single-mode fiber (SMF) is experimentally demonstrated. The power penalty caused by the wavelength reuse is less than 0.8 dB.
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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 | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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".