Reverse-link analysis and performance evaluation of H.263 video transmission for cellular DS/CDMA systems in frequency-selective lognormal-Nakagami fading
Bibliographic record
Abstract
We present the analysis and performance evaluation of H.263 video transmission over the reverse link of a cellular multicode IS-95B system. Our study hence considers CDMA as the channel sharing technique, instead of TDMA which has been used in most previous studies. The frequency-selective channel exhibits Nakagami short-term fading and lognormal shadowing; such a general model allows us to observe the effect of the channel parameters on the video performance. We consider the multiple-cell performance for a more realistic assessment. The numerical results are presented in terms of peak signal-to-noise ratio (PSNR). They indicate that, for each set of channel and receiver parameters, there is a threshold effect, i.e. a maximal number of users can be supported before the video communication breaks down.
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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 | 0.001 | 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 | 0.000 |
| 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".