GNSS Channel Allocation for LOS Signal Prioritization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Satellite positioning system (SPS) receivers face limitations in tracking multiple satellite vehicle (SV) signals due to a finite number of satellite signal channels, leading to inefficient use of processing power and increased cost and power consumption, especially in urban environments where many SVs are partially or non-line of sight, resulting in redundant and poor signal reception.
Innovation Solution
A method and device for dynamically selecting and intelligently allocating satellite signal channels based on signal quality and relevance, prioritizing Line of Sight (LOS) signals, to measure a subset of candidate satellite signals, thereby optimizing channel usage and reducing the number of required channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the SPS receiver attempts to track all visible satellite vehicle signals, then the position fix accuracy may be improved, but the processing power consumption and cost increase significantly
Solution Approach 1:
The patent extracts and eliminates redundant and poor quality satellite signals from the tracking set. By identifying and removing signals that do not contribute meaningfully to position accuracy (such as non-line of sight signals and redundant signals from the same constellation), the system reduces processing requirements while maintaining position fix accuracy.
Solution Approach 2:
The patent applies different quality thresholds and selection criteria to different satellite signal sources based on their characteristics. Line of sight signals are prioritized over non-line of sight signals, and signals from different constellations are evaluated with appropriate weighting, ensuring that processing resources are allocated to the most valuable signals.
2Measurement precision
If the SPS receiver tracks more satellite signals, then the position fix accuracy improves, but the number of required satellite signal channels increases
Solution Approach 1:
The patent extracts only the essential satellite signals needed for accurate position fixing. By eliminating redundant signals and poor quality signals, the system determines that fewer channels are required than would traditionally be needed to achieve the same position accuracy, thereby reducing device complexity.
Solution Approach 2:
The patent applies partial action by tracking only a subset of visible satellite signals rather than all possible signals. By selectively tracking only the most valuable signals (line of sight, high quality), the system achieves sufficient position accuracy with fewer channels, avoiding the excess complexity of tracking all visible signals.
3Adaptability or versatility
If the SPS receiver searches for all satellite vehicle signals above the horizon, then the signal reception coverage is improved, but the time and processing resources are wasted on redundant signals
Solution Approach 1:
The patent performs preliminary classification and filtering of satellite signals before full tracking begins. By pre-identifying and prioritizing line of sight signals and eliminating obviously poor quality signals in advance, the system reduces the time required for signal acquisition and processing while maintaining comprehensive coverage of useful signals.
Solution Approach 2:
The patent extracts and removes redundant signals from the search set before committing processing resources. By identifying and eliminating signals that are likely to be poor quality or redundant (such as signals from the same constellation that provide overlapping coverage), the system reduces search time and processing overhead while maintaining adequate signal reception coverage.
Data Source
AI summary
A method of controlling a satellite positioning system receiver of a mobile device includes: determining, at the mobile device, candidate satellite vehicle positioning signals corresponding to satellite vehicles above a horizon relative to the mobile device; determining, based on at least one respective satellite vehicle signal parameter for each of the candidate satellite vehicle positioning signals, a subset of satellite vehicle positioning signals consisting of fewer than all of the candidate satellite vehicle positioning signals; and causing each satellite signal channel in at least a subset of a plurality of satellite signal channels of the satellite positioning system receiver to measure a corresponding satellite vehicle positioning signal of the subset of satellite vehicle positioning signals.