GPS Parameter Calibration for Mobile Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current GPS calibration methods in mobile terminals are inadequate due to simplicity, complexity, resource consumption, accuracy issues, and limited applicability in diverse environments, failing to meet the increasing performance requirements.
Innovation Solution
A mobile terminal with a GPS parameter calibration module that adjusts parameters based on data from a GPS signal feedback and collection module, state, and environmental parameters, including time delay, Doppler shift, carrier-to-noise ratio, and latitude/longitude calibration, enabling self-adaptive calibration to optimize GPS performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If GPS parameters are calibrated using a small number of terminal samples with a mean value, then the calibration process is simple, but the calibration values are too simple and cannot meet the requirements on the diversity of GPS parameters
Solution Approach 1:
The patent applies local quality by dividing GPS terminals into different groups based on their actual locations, and calibrating parameters separately for each group. This allows different calibration values to be applied to different regions, meeting the diversity requirements while maintaining a structured calibration process.
Solution Approach 2:
The patent implements dynamic calibration by allowing calibration parameters to be adjusted based on actual terminal locations and environmental conditions. The system can dynamically select appropriate calibration values from different regions or adjust parameters in real-time, making the calibration adaptable to diverse GPS requirements.
2Measurement precision
If each terminal is calibrated independently, then the GPS parameter accuracy is improved, but the calibration process becomes complicated and takes a long time, which is not conducive to large-scale production in batches
Solution Approach 1:
The patent segments the calibration process into two stages: a first calibration stage that provides initial calibration values for all terminals, and a second calibration stage that refines parameters for specific regions or terminal groups. This segmentation enables batch processing while maintaining accuracy through targeted refinement.
Solution Approach 2:
The patent applies preliminary action by performing a first calibration on a small number of terminals to obtain initial calibration values, which are then applied to all terminals in a batch. This preliminary calibration provides a solid foundation that speeds up subsequent calibration processes while maintaining accuracy.
3Measurement precision
If A-GPS server assistance is used to provide Doppler frequency shift, then the GPS calibration accuracy is improved, but terminal traffic and network resources are consumed
Solution Approach 1:
The patent implements self-service by enabling terminals to perform self-calibration using locally available information and environmental parameters. The terminal can calculate and adjust its own GPS parameters without continuously relying on A-GPS server assistance, reducing network traffic while maintaining calibration accuracy through autonomous adjustment.
4Device complexity
If software estimation algorithms are used to optimize positioning, then the calibration process is simplified, but the algorithm is complicated and its actual accuracy is not high
Solution Approach 1:
The patent replaces complex software estimation algorithms with a hybrid approach that combines simplified calibration procedures with hardware-based environmental sensing. By using actual environmental parameters (temperature, humidity, pressure) to adjust GPS parameters, the system achieves higher accuracy without relying on complicated approximation algorithms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances GPS calibration efficiency and accuracy, ensuring optimal performance in various environments without relying on A-GPS assistance or complex algorithms, thus improving positioning speed and accuracy.
Implementation Method 1
said Doppler shift calibration module, which is configured to detect a current clock frequency shift of a GPS receiver of said mobile terminal with a hardware clock frequency shift detector, and based on said detected clock frequency shift, correspondingly correct said clock frequency shift of said mobile terminal
Data Source
AI summary
A mobile terminal and a global positioning system calibration method are disclosed in the invention. The mobile terminal includes: a GPS parameter calibration module (10), which is configured to calibrate GPS parameters based on at least one of the following items: data from a GPS signal feedback and collection module (20), state parameters of the mobile terminal, and environmental parameters of the mobile terminal; the GPS signal feedback and collection module (20), which is configured to acquire the GPS parameters before and after the calibration implemented by the GPS parameter calibration module (10) and feed back the collected data to the GPS parameter calibration module (10). The GPS calibration function of the mobile terminal is enhanced with the invention.