Low-power register-exchange Viterbi decoder for high-speed wireless communications
Bibliographic record
Abstract
A new implementation for the Viterbi (1967) decoder (VD) based on the register-exchange (RE) method is described. Conceptually, the RE method is simpler and faster than the traceback (TB) method, but its disadvantage is that every bit in the memory must be read and rewritten for each bit decoded. Using the 'pointer' concept; a pointer is assigned to each register. Instead of copying the contents of one register to another, the pointers are modified. Power dissipation, performance, memory size, and the speed of the survivor memory unit (SMU) are analyzed for both the proposed RE method and the TB method, described in the literature for the next generation wireless applications. The new implementation shows an average power reduction of 45 percent. The BER is 10/sup -5/ at a SNR around 6.1 dB for a continuous uncontrolled encoded sequence. The memory is reduced by half and all read and write operations in the SMU are executed at the data rate frequency.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.002 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".