Performance analysis of multiuser diversity in MIMO channels
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Bibliographic record
Abstract
A central feature of mobile wireless networks is the random fading of the channel strengths of the underlying communication links. Traditionally, fading on wireless channels has been viewed as a form of unreliability that must be mitigated in order to achieve reliable data transfer. A new design principle, known as multiuser diversity, rather harnesses the randomness of this fading in a multiuser environment to improve the performance of the overall system. We develop tractable mathematical models for evaluating the average delay, throughput and symbol error probability (SEP) performances of multiuser diversity systems in MIMO channels. Analytical comparisons with the performances of a conventional round-robin scheme like TDMA are then made. Our results show that with multiuser diversity, there is significant reduction in the average delay that user data packets experience in the network, compared to the TDMA system. It is also observed that throughput and SEP performance for a multiuser diversity system improve as the number of users in the cell increase.
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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 | 0.000 | 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 it