GPS Positioning Offset Correction for Satellite Shifts
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Solution Overview
Problem
Conventional GPS devices experience instantaneous positioning coordinate shifts due to changes in the number of satellites, which are difficult to correct and require time-consuming calculations, making them inconvenient for users.
Innovation Solution
A positioning device and method that utilize a processor to calculate a positioning offset value based on signals from a first and second satellite group, allowing for immediate correction of coordinate shifts without needing to recalculate satellite configurations, using a Least-Squares algorithm to derive the positioning result from the second satellite group signal and stored offset value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional GPS positioning technology calculates positioning solutions of satellite configurations before and after satellite amount change to eliminate positioning offset, then positioning accuracy is improved, but calculation time increases significantly
Solution Approach 1:
The patent pre-calculates and stores positioning solutions for various satellite configurations in advance. When satellite amount changes occur, the system directly retrieves pre-computed positioning offset values from storage rather than performing real-time calculations, thereby eliminating positioning coordinate shifts instantaneously without significant calculation time penalty
Solution Approach 2:
The patent prepares compensatory positioning offset values in advance for different satellite configuration changes. By having these correction values pre-computed and stored, the system can cushion against positioning coordinate shifts when satellite amount changes occur, ensuring continuous accurate positioning without time-consuming on-demand calculations
2Measurement precision
If differential correction algorithm is used to improve GPS positioning accuracy and reduce relative deviation, then positioning accuracy is improved, but device complexity and cost increase due to additional hardware requirements
Solution Approach 1:
The patent extracts and applies only the essential computational component of differential correction algorithms - the positioning offset calculation - while eliminating the need for complex additional hardware such as multiple satellite receivers or data links. The solution uses standard GPS receiver hardware combined with pre-computed correction values stored in memory, thereby achieving differential correction benefits without the associated hardware complexity
Solution Approach 2:
The patent creates simplified copies of differential correction functionality by pre-calculating and storing positioning offset values that replicate the effect of full differential correction systems. This allows common GPS devices to achieve improved positioning accuracy through software-based offset application rather than requiring complex hardware implementations of full differential correction
Data Source
AI summary
A positioning device and a positioning method thereof are provided. The positioning device can cooperate with a first satellite group and a second satellite group, and it comprises a storage, a receiver and a processor. The receiver is configured to receive a first satellite group signal from the first satellite group and a second satellite group signal from the second satellite group. The processor is electrically connected to the storage and the receiver, and configured to calculate a positioning offset value according to one of the first satellite group signal and the second satellite group signal. In addition, the processor is configured to calculate a positioning result according to the second satellite group signal and the positioning offset, and store the positioning result in the storage.