Performance comparison of constant envelope DCT- and FFT-based OFDM systems with phase modulation over frequency-nonselective fading channels
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Bibliographic record
Abstract
In this paper, DCT- and FFT-based constant envelope multicarrier systems with M-PAM mapper are considered. The phase modulation used in these systems to achieve constant envelope results in 0 dB PAPR thereby permitting high power amplifiers to operate with maximum power efficiency. Closed-form expressions for bit error rate are derived for both systems for Rayleigh and Rician fading channels. It is noted that constant envelope DCT-based OFDM system outperforms in terms of bit error rate corresponding to FFT-based OFDM system. Also, it is shown that theoretical bit error rate is nearly the same as that of simulation results, particularly for small values of modulation index at all SNRs.
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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