Electronic Device Location Estimation Using Velocity Error Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Location measurement accuracy in electronic devices is compromised by obstacles such as multipath, interference, and path attenuation, while GPS-based methods consume excessive power.
Innovation Solution
The method involves detecting the location and movement velocity of an electronic device, estimating a second location based on the velocity, comparing the initial and estimated locations to determine measurement errors, and correcting the initial location using the error information, thereby reducing power consumption and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS-based location estimation methods are used, then location measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The location estimation process is segmented into two parts: (1) initial location estimation using power-consuming GPS-based methods, and (2) subsequent location corrections using power-saving relative location changes and movement velocity. This segmentation allows the system to use accurate but energy-intensive methods only when necessary, while relying on energy-efficient methods for routine updates.
Solution Approach 2:
The system performs preliminary location estimation using GPS to establish an initial accurate location baseline. This preliminary action enables subsequent corrections to be made using less power-intensive methods, as the initial accurate positioning eliminates the need for continuous high-power GPS operation.
2Use of energy by moving object
If signal intensity-based location estimation is used, then power consumption is reduced, but location measurement accuracy deteriorates
Solution Approach 1:
Movement velocity information acts as an intermediary that bridges the gap between power-saving signal intensity-based location estimation and accurate location measurement. By incorporating velocity data, the system can correct errors in signal intensity-based estimates without requiring continuous GPS operation, thus maintaining accuracy while reducing power consumption.
Solution Approach 2:
The system uses feedback from comparing initial GPS-based location estimates with corrected locations (based on signal intensity and velocity) to continuously improve location accuracy. This feedback mechanism allows the system to learn and adjust, maintaining high accuracy while operating primarily on low-power signal intensity measurements.
3Measurement precision
If frequent location measurements are performed, then location measurement accuracy is maintained, but power consumption increases
Solution Approach 1:
Instead of continuous location measurements, the system employs periodic GPS-based location estimates combined with continuous but lower-power monitoring of signal intensity and movement velocity. This periodic action maintains location accuracy while significantly reducing power consumption compared to continuous high-precision measurements.
Solution Approach 2:
The system uses partial GPS measurements (only when needed for initial estimation or correction) rather than full continuous GPS operation. This partial action provides sufficient location accuracy for most applications while dramatically reducing power consumption by avoiding excessive measurement activity.
Data Source
AI summary
An electronic device apparatus and method are disclosed herein. The apparatus includes a processor. The processor may execute the method, which includes detecting a first location and a movement velocity of the electronic device, estimating a second location of the electronic device based on the detected movement velocity of the electronic device, comparing the first location of the electronic device and the estimated second location of the electronic device to determine a location measurement error, and correcting the detected first location of the electronic device based on the determined location measurement error.