A pilot symbol assisted interference cancellation scheme for an asynchronous DS/CDMA system
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Bibliographic record
Abstract
We consider a single cell asynchronous BPSK DS/CDMA system with successive interference cancellation. The system operates in a Rayleigh flat fading channel and pilot symbols are inserted periodically to the transmitted data for the purpose of channel estimation. We introduced previously a pilot symbol assisted interference canceller that was made up of two parts-a decorrelating receiver for the faded pilot symbols, followed by a successive interference canceller (SIC) for the data symbols. The receiver could operate in small cells with a maximum round trip delay of a quarter of a symbol time and was able to provide a performance improvement over a pure SIC receiver for both the pilot and the data symbols. We introduce two fragile structures that allow the usage of the hybrid receiver in larger cells with a round trip delay of one symbol time. Furthermore, the complexity of the decorrelator is kept at a moderate level. The performance of the hybrid receiver operating on both frame structures is compared and a comparison is made with a pure SIC cancelling receiver. It was found that one of the investigated frame structures in conjunction with the hybrid receiver increased the system capacity as compared to a pure SIC receiver and offers moreover a comparable system complexity.
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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 | 0.002 | 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