Characterization and Modeling of a Wireless Channel at 2.4 and 5.8 GHz in Underground Tunnels
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Underground tunnels, such as caverns and mine galleries, are indoor environments far more hostile, in terms of wireless communication, than conventional ones like road tunnels, offices or factories. Wireless propagation behavior in these areas is found to be fairly peculiar, mainly due to the extreme roughness of wall surfaces. This paper presents comprehensive broadband measurement and modeling results of electromagnetic wave propagation in real underground mine tunnels at 2.4 and 5.8 GHz. Broadband radio propagation in these environments is observed to exhibit behavior that is quite different from conventional indoor environments with smooth surfaces. Notably, signal variation can be highly locally specific and site-specific, rms delay spread varies randomly with transmitter-receiver distance and no path arrival clustering effect is observed. These path time arrivals tend to follow a Modified Poisson distribution and amplitude tends to follow Rice and Rayleigh distributions for line-of-sight and non-line-of-sight cases, respectively. Extensive simulations have shown the models to be very close to reality.
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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