Bibliographic record
Abstract
MIMO has developed increased spectral efficiency in wireless systems where there is rich multipath in the propagation channel. MIMO has also been applied to multi-conductor channels where the cross-talk between the individual conductors limits cable capacity. Here, the theoretical capacity of two structures is compared: completely random complex Gaussian (i.i.d.) and circulant (feasible for cables). The comparison is extended to a practicable capacity using QAM modulations. It is shown that for large SNRs, where there is enough power to use all the eigenchannels, circulant structures show higher capacity. For small SNRs, the water-filling eigenchannel cut-off feature means that the completely random channel case has the higher capacity. The more similar pdfs of the eigenvalues of the circulant is the mechanism for higher capacity for large SNRs. This is confirmed by the theorem of maximum capacity for the parallel channels
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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 | 0.000 |
| 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 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".