GNSS Positioning Device Bit Edge Synchronization Error Handling
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Solution Overview
Problem
Existing positioning systems using global navigation satellite systems (GNSS) face challenges in accurately determining device location when there are only 5 valid satellite signals, due to synchronization errors and weak satellite signals, leading to incorrect positioning information.
Innovation Solution
A method and device that identify and exclude satellite signals with wrong bit edges, allowing accurate positioning using the navigation data from the remaining satellite signals, ensuring correct positioning coordinates are calculated even with incomplete satellite data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fault detection and exclusion algorithm is used for positioning, then positioning reliability is improved, but the method is only applicable when there are more than 5 valid satellite signals, making it inapplicable under weak satellite signal conditions
Solution Approach 1:
The patent performs preliminary detection of bit edge synchronization status for each satellite signal before using it for positioning. By pre-identifying which satellites have correct bit edges and which have wrong bit edges, the system can selectively exclude problematic satellites from positioning calculations, enabling reliable positioning even with fewer than 5 valid signals.
Solution Approach 2:
The patent applies different quality assessment criteria to each satellite signal individually, evaluating the bit edge synchronization status of each specific satellite rather than treating all signals uniformly. This allows the system to identify and exclude only the problematic signals while utilizing available good signals for positioning, improving both reliability and adaptability.
2Productivity
If all available satellite signals are used for positioning calculation, then positioning speed is improved, but positioning accuracy deteriorates due to wrong bit edge synchronization errors
Solution Approach 1:
The patent implements a feedback mechanism where the bit edge synchronization status of each satellite signal is detected and fed back into the positioning calculation process. Based on this feedback, the system dynamically determines which satellites to include and which to exclude from the positioning calculation, achieving both speed and accuracy by avoiding erroneous signals.
Solution Approach 2:
The patent extracts and removes satellite signals with wrong bit edges from the set of available signals before performing positioning calculations. By taking out the problematic signals, the system maintains positioning speed using the remaining valid signals while ensuring positioning accuracy is not compromised by erroneous data.
Data Source
AI summary
A method of positioning a device includes: receiving satellite signals corresponding to at least 5 satellites in a global navigation satellite system (GNSS); determining whether there is one of the satellite signals has a wrong bit edge from at least navigation data of the satellite signals; and in response to a determination that there is one of the satellite signals has a wrong bit edge, finding out a wrong satellite signal among the satellite signals, and using the navigation data of the other satellite signals to obtain a position of the device.