Relay Selection Based Hybrid RF/FSO Transmission over Double Generalized Gamma Channels under Outdated CSI and Pointing Errors
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Bibliographic record
Abstract
This paper analyzes the performance of dual-hop amplify-and-forward hybrid radio-frequency/free-space optical (RF/FSO) transmissions with partial relay selection based on outdated channel state information estimates. The FSO channel modeling accounts for turbulence-induced fading, path loss, and pointing errors as well. Essential statistics of the system end-to-end signal-to-noise ratio (SNR) are derived in closed-form, yielding novel expressions for its cumulative distribution function and probability density function. Afterwards, novel closed-form expression for the system outage probability is obtained. High SNR approximation is applied to the obtained expression, yielding simple and easily tractable results, that, additionally, offer useful insights into the system performance. The analysis is unified, applying to both types of detection techniques, i.e., intensity modulation/direct direction and heterodyne detection. Monte Carlo simulation results corroborate the proposed analysis, and provide additional insights on the system performance.
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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 | 0.000 |
| 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 it