Extracting GNSS Pseudoranges for External Positioning
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Solution Overview
Problem
Conventional cellular devices with integrated GNSS chipsets primarily provide position fixes but do not make pseudorange information available for external use, limiting its application in surveying and positioning operations.
Innovation Solution
An embedded GNSS chipset in cellular devices calculates and extracts pseudorange information, allowing its use outside the GNSS chipset for improved positioning accuracy through processing and integration with other systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pseudorange information is made available for external use from the GNSS chipset, then positioning accuracy and application flexibility are improved, but device complexity and security risks increase
Solution Approach 1:
The patent extracts pseudorange information from the GNSS chipset and makes it available to external applications through a controlled interface. This allows positioning data to be shared with external systems while maintaining a clear separation between the GNSS processing functions and application-level processing, thereby improving positioning accuracy without proportionally increasing overall system complexity
Solution Approach 2:
The patent introduces a controlled information extraction interface that acts as an intermediary between the GNSS chipset and external applications. This intermediary mechanism enables secure and managed sharing of pseudorange data, allowing external systems to access positioning information while the device maintains control over data handling and security
2Adaptability or versatility
If pseudorange information is extracted and processed externally, then application versatility is improved, but reliability and security control are worsened
Solution Approach 1:
The patent implements feedback mechanisms where the device can monitor and control how extracted pseudorange information is used by external applications. This allows the system to maintain security awareness while enabling application versatility, as the device can respond to usage patterns and potential security issues while still allowing flexible external processing
Data Source
AI summary
A Global Navigation Satellite System (GNSS) chipset embedded within the cellular device is accessed. The GNSS chipset calculates raw pseudoranges. The raw pseudoranges are extracted from the GNSS chipset for processing elsewhere in the cellular device outside of the GNSS chipset. A position fix is determined based on the raw pseudoranges. Locally measured cellular device movement information is obtained from at least one sensor that is in a known physical relationship with the cellular device. The locally measured cellular device movement information is applied to the position fix.