Error performance of a duplex retrodirective array system
Why this work is in the frame
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Bibliographic record
Abstract
A retrodirective antenna array has the property that it is capable of independently phasing the array elements so that it provides an improved link gain in the direction of the incoming signal without prior knowledge of the position of the source radiator. Many schemes have been proposed to achieve the retrodirectivity including the use of digital signal processing techniques. However, the diverse digital RF communication schemes pose a considerable challenge when it comes to quantitatively measuring the quality of a retrodirective system. Therefore, it becomes necessary to perform the analysis in time, frequency and modulation domains in order to obtain an insight into the RF system performance. Error vector magnitude (EVM) measurements by virtue of their ability to process the signals in full vector (magnitude and phase), provides us with a quantitative figure-of-merit for a digitally modulated signal. This paper presents the simulation model of a retrodirective communication system and its error performance in terms of EVM. The simulation and EVM measurements were performed for the first time on a DSP based half duplex retrodirective system.
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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