Performance of a reference symbol assisted multi-stage successive interference cancelling receiver with quadriphase spreading
Bibliographic record
Abstract
The performance of a multi-stage successive interference cancelling receiver using reference symbols to obtain channel estimates in a CDMA system is investigated with quadriphase spreading. The focus is on the reverse link of a system with binary antipodal modulation and coherent detection. The results show that for a hexagonal cell geometry with path loss exponent of 4 and without any forward error correction coding, the capacity of the system is between 1.17 and 1.67 times that of the IS-95 system. Further investigation with non-idealized cell geometries and other path loss exponents shows substantial capacity improvement over that of conventional non-interference cancelling receivers. The sensitivity of the system to power control and synchronization errors is also investigated. The results also show that relaxing the power control reduces the capacity. The capacity increase over systems with interference cancelling receivers and biphase spreading is between 1.4 and 2.0 times. Chip synchronization errors of the order to be expected in a properly designed conventional CDMA system have minimal effect on performance.
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How this classification was reachedexpand
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 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".