Photonic microwave matched filters for chirped microwave pulse compression
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Bibliographic record
Abstract
In this paper, a technique to design and implement a photonic microwave matched filter for chirped microwave pulse compression is presented. To realize matched filtering, the filter should have a spectral response that is matched to that of the input pulse, which is implemented in this paper using a photonic system that consists of an optical single-sideband (SSB) modulator and a fiber Bragg grating (FBG). The FBG is designed to have a spectral response which is transferred to the spectral response of the microwave filter via SSB modulation and heterodyne detection at a high-speed photodetector. A theoretical investigation on the microwave filter design and the chirped microwave pulse compression is developed. Theoretical analysis on the implementation of three different forms of microwave matched filters, including a classical complex matched filter (CMF), a phase-only filter (POF) and a modified inverse filter (MIF), is presented. A comparison between the filters against the performance measures for a linearly chirped microwave signal compression is provided.
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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)
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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