Intelligent Navigation in Urban Environments Based on an H-infinity Filter and Reinforcement Learning Algorithms
Bibliographic record
Abstract
In urban areas, robustness of a positioning solution suffers from relatively unpredictable reception of attenuated, non-line-of-sight and multipath-contaminated signals. To reflect a GNSS signal propagation environment, parameters of a state estimation filter need to be adjusted on-the-fly. A mixed H2/ H∞filter has been considered here to address the vulnerability of a minimum error variance estimator to measurement outliers. An emphasis between the H2filter and the H∞filter (minimizing the worst-case error) is continuously adjusted by a reinforcement learning (RL) model. Specifically, a continuous action actor-critic RL model with eligibility traces is implemented. The Cramér-Rao lower bound is considered for the filter performance evaluation allowing for the RL reward computation. The algorithm has been tested on a real-world dataset collected with mass-market hardware applying tightly-coupled IMU/GPS sensor integration. A positive RL model learning trend has been identified in two segments of the trajectory with the highest obstruction environment, suggesting the applicability potential of the technique.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".