GFDM-Modulated Full-Duplex Cognitive Radio Networks in the Presence of RF Impairments
Why this work is in the frame
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Bibliographic record
Abstract
This paper investigates the problem of sum rate maximization for a full-duplex (FD) generalized frequency division multiplexing (GFDM) based secondary user (SU) link, operating in a spectrum hole. The right and left adjacent channels of the spectrum hole have two active primary users (PUs), and thus adjacent channel interference (ACI) on them must be below a threshold. For SU link, radio frequency (RF) impairments including phase noise, in-phase (I) and quadrature (Q) imbalance, and carrier frequency offset (CFO) are considered and analog domain and digital domain self-interference (SI) cancellation techniques are applied. We consider two cases: (1) two independent oscillators for local transmitter and receiver, (2) single shared oscillator between them. We derive the powers of residual SI, desired signal and noise and signal-to-interference-plus noise ratio (SINR). Furthermore, power spectral density (PSD) of FD transmitter is calculated and ACI is formulated. By using successive convex approximation, sum rate maximization problem subject to ACI limits on adjacent PUs is defined and solved. Finally, we show that FD GFDM for the SU link can achieve twice higher sum rate than FD orthogonal frequency division multiplexing (OFDM).
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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