RF Hardware Modeling of a Direct Conversion Receiver Using SDMA
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Bibliographic record
Abstract
A study of the effects of front-end impairments on the overall performance of a direct conversion wireless receiver using SDMA is presented. A system-level model, simulated with Verilog-AMS and using Verilog behavioral blocks, is used to evaluate the performance of the receiver under non-ideal RF circuit conditions. Design issues inherent to direct conversion receivers, including IIP2, quadrature mismatches, LO self-mixing and 1/ <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">f</i> noise are included in the RF models. In addition, noise figure, IIP3 and LO phase noise are modeled. Simulation results show that the use of SDMA is able to significantly boost system performance and compensate for much of the RF impairments. For example, it is seen that I/Q amplitude and phase mismatches of 5 dB and 32deg respectively, can be tolerated while still providing acceptable bit error rate.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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