Implementation of high-peed multi-level QAM modems based on Xilinx Virtex-II FPGA
Why this work is in the frame
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Bibliographic record
Abstract
This paper describes an implementation of high-speed multi-level quadrature amplitude modulation (QAM) modems using Xilinx Virtex-II field programmable gate arrays (FPGA). The design starts with system-level simulations and exploits different architectures and algorithms available for digital filters, which is a key component of a QAM modem. System efficiency is highlighted with the parallel-pipelined structure and look-up table based implementation, such that the design benefits from performance as well as chip size. Sufficient arithmetic precision is employed in the internal data-path to avoid the possibility of overflow so that the digital filter always presents a full-precision result at its output; thus precision need not be sacrificed to attain high-speed. The benchmarks indicate that the maximum input bit rate can reach 330 Mbps for 64-QAM.
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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 | 0.001 |
| 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