Extracting Pseudorange Data from Embedded GNSS Chipsets
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Solution Overview
Problem
Conventional cellular devices with integrated GNSS chipsets primarily provide position fixes but do not make available pseudorange information for use outside the GNSS chipset, limiting its utilization in surveying and other positioning operations.
Innovation Solution
An embedded GNSS chipset in cellular devices calculates and permits the extraction of pseudorange information, allowing its use elsewhere in the device, utilizing a Secure User Platform Location (SUPL) client to access and process this information for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional GNSS chipsets are used in cellular devices, then position fixes are provided, but pseudorange information is not made available for external use
Solution Approach 1:
The patent extracts pseudorange information from the GNSS chipset and makes it available through the cellular device's processing system. The GNSS chipset calculates pseudorange data internally, and the invention enables extraction of this information for use by other applications in the cellular device, thereby resolving the contradiction between information availability and device complexity.
2Measurement precision
If pseudorange information is extracted and processed, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The cellular device's processing system is designed to handle multiple functions including position fixing, pseudorange extraction, and enhanced positioning calculations. By making the processing system universal and capable of handling both conventional GNSS outputs and extracted pseudorange data, the patent improves positioning accuracy without proportionally increasing device complexity.
Data Source
AI summary
External accessory data is collected at a mobile data collection platform provided by an external accessory of the mobile data collection platform. An image that includes a point of interest is captured by an image capturing device that is an integral part of the mobile data collection platform performs. Raw observables are obtained from an external GNSS raw observable provider that is separate from and outside of the mobile data collection platform. A position fix of the mobile data collection platform is determined based on the raw observable. Orientation information comprising a tilt angle and an azimuth angle is determined. External accessory data is received from an accessory that is external to the mobile data collection platform. The image, the position fix, the orientation information and the external accessory data are stored in hardware memory of the mobile data collection platform.