GPS Receiver Motion Data Fusion for Signal Loss
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Solution Overview
Problem
Current mobile communication devices and GPS receivers face challenges in maintaining accurate position and velocity data, especially when experiencing signal loss or interference, which affects communication quality and reliability.
Innovation Solution
The integration of an RF integrated circuit (RF IC) that processes GPS position and velocity data, along with motion parameters from external sources, to generate motion data and adjust transmit and receive characteristics, such as power levels and antenna configurations, to compensate for signal issues and ensure continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS receivers rely solely on GPS signals for position and velocity data, then measurement precision is maintained under ideal conditions, but reliability deteriorates when signal loss or interference occurs
Solution Approach 1:
The patent combines GPS receiver with motion sensing capabilities (accelerometers, gyroscopes, magnetometers) into an integrated system. The processor fuses GPS data with motion sensor data to generate position and velocity information, ensuring continuous reliable positioning even when GPS signals are lost or interfered with.
Solution Approach 2:
The system dynamically changes operational parameters by switching between GPS-based positioning and motion-based positioning modes. When GPS signal quality deteriorates, the system transitions to relying more heavily on motion sensor data, adjusting the weighting and fusion parameters to maintain both reliability and precision under varying conditions.
2Reliability
If communication devices increase transmit power to compensate for signal loss, then communication reliability improves, but energy consumption increases
Solution Approach 1:
The system employs feedback mechanisms where the processor continuously monitors signal conditions, position accuracy, and power consumption levels. Based on this feedback, the system dynamically adjusts transmit power levels and positioning update frequencies to maintain communication reliability while optimizing energy usage.
Solution Approach 2:
The communication device dynamically adapts its operational characteristics including transmit power, positioning update rate, and sensor sampling frequency based on real-time conditions. This dynamic adjustment allows the system to maintain reliability during critical moments while conserving energy during stable periods.
3Measurement precision
If GPS receivers continuously update position data, then measurement precision is maintained, but use of energy increases
Solution Approach 1:
The system implements periodic positioning updates with variable intervals. Instead of continuous high-frequency updates, the processor determines optimal update periods based on motion characteristics, signal conditions, and application requirements. Motion sensor data fills gaps between GPS updates, maintaining precision while reducing overall energy consumption.
Data Source
AI summary
A circuit includes a global positioning system (GPS) receiver that receives a GPS signal and that generates GPS position data based on the GPS signal. A wireless receiver converts an inbound RF signal into an inbound symbol stream. A processing module converts the inbound symbol stream into inbound data that includes a motion parameter and generates position information based on at least one of the GPS position data and the motion parameter.