A full‐duplex dual‐polarization QPSK in a digital radio‐over‐fiber system
Bibliographic record
Abstract
Abstract The author numerically investigates the performance of a 100 Gb/s dual‐polarization quadrature phase‐shift keying (DP‐QPSK) coherent radio‐over‐fiber (RoF) system through deploying various lengths of standard single‐mode fiber (SSMF). The utilization of a microwave photonic integrated circuit (MPIC) as the core building block of this optical coherent RoF link both in downlink and uplink, combined with digital signal processing (DSP) has led to a new RoF scheme which demonstrated the feasibility to operate at the low input RF power. The performance of the RoF system with respect to the optical received power induced by channel SNR is also investigated. It has been demonstrated that for a 200 km length of fiber, a laser with a linewidth of less than 1 MHz results in the EVM compliant to the IEEE standards. It has been also verified that the link offers higher linearity and better receiver sensitivity compared to the conventional intensity modulated and directly detected optical communication systems.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".