A Microwave Photonic Tunable Receiver with Digital Feed-Forward Phase Noise Cancellation for Electronic Support Measures and Antenna Remoting
Why this work is in the frame
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Bibliographic record
Abstract
A high performance photonics-based RF tunable receiver that exploits a novel digital feed-forward phase noise cancellation technique is proposed and experimentally demonstrated. In the scheme, a signal receiver exploits an optical I/Q architecture fed by two free-running lasers to filter and down-convert to baseband the incoming RF signal. At the same time, a reference receiver acquires the phase-noise of the two free-running lasers by heterodyning them with an optical frequency comb. Then, a digital feed-forward algorithm utilizes the heterodyning signal to extract the differential phase noise between the two free-running lasers so that to cancel the phase noise that the lasers sources introduce to the baseband signal. Moreover, the scheme is effectively divided in a central unit and a remote-antenna module in order to provide improved remoting capability through fiber optic links. An experiment demonstrates low phase noise operation in an RF input range of 0-50 GHz, only limited by the available laboratory equipment. Photonic integration of the scheme will reach high environmental stability and chip-scale footprint, targeting the challenging requirements of next-generation electronic support measures systems.
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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) | 0.000 | 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 it