GNSS Receiver Power Budget Calibration
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Solution Overview
Problem
Conventional GNSS receivers face increased power consumption and reduced navigation performance due to the need for specific modes in varying operating environments, leading to battery drainage and potential navigation errors.
Innovation Solution
A GNSS-enabled device that selectively switches between different GNSS technology modes based on available power and positioning error values, calibrating inertial sensors to minimize power usage while maintaining navigation quality by alternating between active and inactive states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a specific GNSS technology mode is implemented to maintain navigation performance in different operating environments, then navigation performance is improved, but power consumption increases leading to battery drainage
Solution Approach 1:
The system dynamically switches between different GNSS technology modes (first mode and second mode) based on operating conditions and power availability. The receiver circuitry adapts its operation by selecting appropriate modes to balance navigation performance requirements with power consumption constraints, rather than operating in a fixed mode.
Solution Approach 2:
The system changes operational parameters by switching between different GNSS technology modes with different power consumption characteristics. The controller adjusts the operating mode based on power budget conditions, effectively changing the system's energy consumption profile while maintaining acceptable navigation performance.
2Reliability
If the receiver circuitry remains continuously active to ensure accurate position tracking, then navigation performance is improved, but power consumption increases
Solution Approach 1:
The receiver circuitry operates in periodic cycles, alternating between active states (first mode and second mode) and inactive states. The inertial sensor provides continuous position tracking during inactive periods, allowing the GNSS receiver to be powered down periodically while maintaining overall navigation accuracy through sensor fusion.
Solution Approach 2:
The inertial sensor acts as an intermediary that bridges the gap between periodic GNSS receiver activation and continuous position tracking requirements. During periods when the GNSS receiver is inactive, the inertial sensor maintains position estimates, effectively mediating the transition between power-saving mode and accurate tracking.
3Measurement precision
If the inertial sensor is continuously calibrated with high-accuracy GNSS modes, then measurement precision is improved, but power consumption and battery drainage increase
Solution Approach 1:
The system applies partial calibration action by using the inertial sensor for position tracking without continuous calibration from the GNSS receiver. The inertial sensor provides sufficient accuracy for many applications without requiring frequent high-precision GNSS calibration, reducing power consumption while maintaining acceptable measurement precision.
Data Source
AI summary
A Global Navigation Satellite System (GNSS) enabled device includes an inertial sensor and receiver circuitry to track a position of the GNSS enabled device. The receiver circuitry selects a mode of a GNSS technology based on power available at the GNSS enabled device and a positioning error value associated with the mode of the GNSS technology. The positioning error value associated with the selected mode is less than a specified accuracy threshold. The receiver circuitry calibrates the inertial sensor based on the selected mode of the GNSS technology to track the position of the GNSS enabled device to reduce the overall power consumption at the GNSS enabled device.