Parallel-Processing-Based Digital Predistortion Architecture and FPGA Implementation for Wide-band 5G Transmitters
Why this work is in the frame
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Bibliographic record
Abstract
This paper presents a bandwidth-scalable and hardware-efficient parallel-processing-based D PD architecture for wide-band 5G transmitters. By computing multiple data samples at each clock cycle in parallel, the proposed DPD architecture extends the bandwidth of a conventional serial DPD architecture, as limited by the maximum FPGA clock rate, to a much higher rate that is proportional to the number of parallel data paths. With a cross-bar structure devised to reroute the intermediate computation results between the parallel data paths, it allows advanced DPD model with memory and cross-terms to be constructed efficiently. F or proof-of-concept, the pruned Complexity-Reduced-Volterra (CRV) DPD with four parallel data paths has been implemented using an Xilinx Ultrascale+ FPGA to achieve a total linearization bandwidth of 1.25 GHz. Subsequently, a 28 GHz power amplifier modulated with 400 MHz QAM64 signals has been successfully linearized in the proposed DPD system in real-time.
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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