Effect of system imperfections on BER performance of CDMA correlator receiver
Why this work is in the frame
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Bibliographic record
Abstract
Direct sequence spread spectrum CDMA systems is receiving considerable attention in the field of mobile communication. The bit error rate performance of a code division multiple access correlator type receiver with imperfections in power control, carrier phase estimate and spreading code phase estimate is analyzed. Imperfection in power control is taken into account by modeling the received signal power as a log normally distributed random variable. The phase estimate errors are modeled as zero mean Gaussian random variables. It is shown that the performance of such a receiver significantly degrades when variance of power control imperfection is above 0 dB, standard deviation of the code phase error is above 0.01 and mean square error of carrier phase estimate is above 0.01. The communication system considered is a microcellular system operating in an indoor environment where K transmission stations are asynchronously transmitting over their individual multipath fading channels to the base station receiver.
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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 | 0.001 | 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 | 0.000 |
| Open science | 0.001 | 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