Hierarchical constellations for multi-class data transmission over block fading channels [mobile communications]
Bibliographic record
Abstract
We study An application of hierarchical constellations (known also as nonuniform, asymmetric, and multi-resolution constellations) in conjunction with a retransmission strategy to multi-class data transmission over block fading channels. The basic idea is to assign different hierarchies of a hierarchical quadrature amplitude modulation (QAM) to different classes of data according to their transmission priorities (quantified through their average throughput and delay requirements) and then to apply a truncated retransmission scheme to each hierarchy (or equivalently each class of data) separately in order to meet the delay requirements of the various services. We present closed-form expressions for the average packet loss rate and the packet transmission rate of each class of data over Nakagami-m block fading channel. Some numerical results show that the proposed hierarchical scheme outperforms a classical time-multiplexing scheme employing power-controlled uniform QAM constellations for multi-class data transmission over block fading channels.
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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 | 0.004 |
| 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 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".