Bibliographic record
Abstract
Pulse shapes previously proposed for ultrawideband communication systems are studied and compared to determine which provide the best performance. The performance measures considered are the bit error rate in multiple access interference environments and compliance with required spectral emission constraints. The Gaussian monocycles of higher orders and the prolate spheroidal function-based pulses are found to meet the spectral emission masks without frequency shifting. Frequency shifting and bandpass filtering must be used for the modified Hermite polynomial-based pulses to meet the spectral masks. The multiaccess performance average error rates of time-hopping ultrawideband systems using different pulse shapes are examined and compared using a newly published exact performance analysis method. The Gaussian monocycles are shown to achieve performance as good as the prolate spheroidal function-based pulses with the same effective bandwidths in numerical examples. The Gaussian monocycles outperform the modified Hermite polynomial-based pulses for the system models considered. Some tradeoffs of these pulses are also addressed in terms of the complexity of their implementations and the average bit error probabilities.
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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 | 0.001 | 0.003 |
| 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 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".