Fast-OFDM With Index Modulation for NB-IoT
Why this work is in the frame
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Bibliographic record
Abstract
In this letter, a hybrid orthogonal frequency-division multiplexing (OFDM)-based modulation technique for narrowband Internet of Things (NB-IoT) is introduced and analyzed. The technique combines fast-OFDM with index modulation in order to maximize bandwidth and power efficiency for IoT applications. The ideal number of active subcarriers to maximize spectral efficiency is derived. The one-dimensional constellation used in fast-OFDM is also optimized to enhance error performance of the proposed system. Numerical results indicate that the proposed system outperforms other OFDM systems based on index modulation in the relatively low signal-to-noise ratio (SNR) region, while it provides additional design options for trading off power efficiency and spectral efficiency in the higher SNR region.
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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 | 0.001 | 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 it