Chip-Asynchronous Binary Optical CDMA: An Optimum Signaling Scheme for Random Delays
Why this work is in the frame
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Bibliographic record
Abstract
Most optical code division multiple access (OCDMA) research literature has focused on chip-synchronous OCDMA. However, practical OCDMA networks are inherently chip-asynchronous since users transmit their signals from different locations without any coordination. This paper focuses on binary chip-asynchronous OCDMA with time spreading, and the main result is that appropriate nonuniform signaling can achieve a data throughput of 2.5 bits per OCDMA chip. This result shows that the presence of chip asynchronism leads to approximately a threefold capacity gain over chip-synchronous OCDMA capacity. Additional results are presented to illustrate that the near capacity multiuser interference has a low variance and a non-Gaussian distribution. Finally, the robustness of the achieved capacity gains is verified in the presence of additive channel noise.
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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 | 0.001 | 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 | 0.001 |
| Open science | 0.000 | 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