Low-Complexity Optical Distribution of Gb/s BPSK UWB Signals
Bibliographic record
Abstract
Optical transport of ultra-wideband (UWB) signals extends the reach of these power-limited signals to several kilometers. We propose and experimentally demonstrate a simple and low-cost optical method to generate UWB pulses. We use few optical components (source/modulator/photodetector), in contrast to most other optical generation techniques. UWB pulses complying with the U.S. Federal Communications Commission spectral mask are generated by modulating the intensity of a continuous-wave laser with a combined signal consisting of the data signal and a sinusoidal signal. For impulse radio UWB, binary phase-shift-keying is accomplished simply by adjusting the amplitudes of the data and the sinusoidal signal. Wireless propagation of the UWB impulses is investigated experimentally at a very high bit rate. The receiver is implemented using a real-time oscilloscope to capture the received waveforms followed by offline signal processing. In particular, we consider a minimum-mean-square error equalizer to counter the multipath-induced intersymbol interference encountered at 1.75 Gb/s. Equalization brings the bit-error-rate within the forward-error correction limit of after 2.5 m of wireless propagation at 1.75 Gb/s.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| 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 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".