SNR-based vs. BER-based power allocation for an amplify-and-forward single-relay wireless system with MRC at destination
Bibliographic record
Abstract
Optimum power allocation improves the efficiency of wireless systems. While optimizing the average received SNR would directly result in an optimized average BER in a non-relaying system, it is not clear whether we can achieve an optimized average BER in a relaying system by optimizing the average SNR at the destination terminal. In this paper, the problem of power allocation in a single-relay wireless system with maximal ratio combining (MRC) at the destination terminal is investigated via optimizing two different objective functions: average SNR and average BER. The average SNR and average BER expressions are derived for an amplify-and-forward relaying protocol with MRC at the destination as a function of source and relay transmit powers. Based on the derived SNR and BER expressions at the destination, closed-form expressions are derived for optimum transmit power of source and relay. It is observed that the BER-based power allocation scheme achieves considerable performance improvement over the SNR-based scheme when the relay is closer to the source than destination.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".