A 0.78mm² Co-Channel Interference Canceller in 130nm SOI RF CMOS with Novel Passive Phase Shifters and Combiner Circuitry
Bibliographic record
Abstract
An increasingly congested frequency spectrum has presented an unfortunate opportunity for two independent radios on the same device to exist co-channel.Currently, co-channel coexistence requires temporal scheduling to prevent co-channel interference from disrupting downlink communications.This work develops a method of front end cochannel cancellation within the receive chain of a co-channel transceiver to allow for simultaneous operation.An extremely compact co-channel interference canceller (CCIC) is presented.A polar modulator in a feed-forward path creates an inverted copy of the on-board interference signal at RF and recombines in the front end LNA for cancellation.The system contains novel phase shifters and digital capacitor architectures and a novel front end combination circuit.The system provides 6 bits of phase control and 5 bits of amplitude control and 25dB of cancellation is demonstrated.The measured IIP3 was +7dBm and the measured noise figure was 1.5dB with 14dB of LNA gain at 2.2GHz.Chapter 6: Simulation Results .........
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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 | 0.000 |
| 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 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".