Stochastic Implementation of LDPC Decoders
Why this work is in the frame
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Bibliographic record
Abstract
LDPC codes are found in many recent communications standards such as 10GBASE-T, DVB-S2 and IEEE 802.16 (WiMAX). We present a review of a new class of "stochastic" iterative decoding architectures. Stochastic decoders represent probabilistic messages by the frequency of ones in a binary stream. This results in a simple mapping of the factor graph of the code into silicon. An FPGA implementation of a LDPC decoder with 8 information bits and 8 coded bits is described. On an Altera Cyclone FPGA, the throughput is 5 Mbps when clocked at 100 MHz and is expected to increase nearly linearly with the code length. Simulations of the decoder on an Altera Stratix FPGA indicate a potential throughput of 8 Mbps
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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