Performance of constant envelope DCT based OFDM system with M-ary PAM mapper in AWGN channel
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Bibliographic record
Abstract
Constant envelope discrete cosine transform based Orthogonal Frequency Divination Multiplexing (CE-DCT-OFDM) system is presented. The performance of such a system is examined over AWGN channel for transmission of data using M-ary pulse amplitude modulation (M-ary PAM) mapper. In the system, phase modulation (PM) is used to overcome the problem of high peak-to-average power that is typical in conventional DCT-OFDM systems. As a result the system permits high power amplifier to operate near saturation level and thus offers maximum power efficiency. Closed-form expression for bit error rate of the system is derived, illustrated, and compared to simulation results. Also, bit error rate performance of CE-DCT-OFDM and conventional DCT-OFDM systems are compared as a function of IBO and SNR using traveling-wave tube amplifier (TWTA) model. It is observed that CE-DCT-OFDM system offers a variety of advantages over conventional DCT-OFDM 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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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)
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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