Photonic Generation of Precisely $\pi$ Phase-Shifted Binary Phase-Coded Microwave Signal
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Bibliographic record
Abstract
A novel photonic approach to generating a precisely π phase-shifted binary phase-coded microwave signal is proposed and experimentally demonstrated. A phase modulator is employed to generate two ±1st-order sidebands and an optical carrier. Due to the inherent ±π/2 phase shifts of the two ±1st-order sidebands, a binary phase-coded microwave signal with a precise phase shift of π is generated through beating one sideband with the optical carrier at a time, which is realized by joint use of a polarization-maintaining fiber Bragg grating and a polarization modulator to select one of the two sidebands and the optical carrier. The generation of a binary phase-coded microwave signal with a precise π phase shift and with a tunable frequency from 18 to 22 GHz is experimentally demonstrated.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 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 it