Six-port direct digital receiver (SPDR) and standard direct receiver (SDR) results for QPSK modulation at high speeds
Bibliographic record
Abstract
Comparative measurements on two direct down-conversion receivers are presented to investigate the performance of a six-port digital receiver (SPDR) with a standard direct receiver (SDR) using quadrature zero-IF mixers. The six-port prototype is fabricated in MHMIC format for a carrier frequency of 2.45GHz with QPSK digital modulation suitable for wireless local loop such as WLAN or MMDS systems. BER measurements on both receivers are presented in the presence of noise, adjacent channel and cochannel interference, local oscillator phase shift and sensitivity for 40 Mb/s data rate. MMIC design scheme of the six-port digital receiver can provide a robust, simple, low-cost design platform for use in mass-market communication systems for present and future multimedia broadband applications.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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 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".