A constrained maximum-likelihood approach for efficient multipath mitigation in GNSS receivers
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
In this paper, we develop a new method for mitigating multipath effects in GNSS receivers, based on a constrained maximum-likelihood (CML) estimates of the multipath parameters. First, we apply a nonlinear transformation on the signal parameters to reduce the search space. Then, we define a new criterion for constraining the relative amplitude of the received secondary signal, and use the Lagrange multiplier method to solve the CML optimization problem. The resulting likelihood cost function has a unique minimum and yields to closed-form parameters estimates. The proposed method does not suffer from the correlation multi-peak problem, as for the standard discriminators, thus it can be used for any type of GNSS signal to mitigate both code and carrier phase multipath errors, including the new BOC signals. Numerical examples show that the CML approach gives a significant refinement to reach the optimal positioning solution.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 |
| 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 it