GNSS Receiver Signal Decimation via Wide-Band RF Filtering
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Solution Overview
Problem
The size reduction of integrated circuits has not been uniformly applied to all circuitry in mobile devices, limiting the miniaturization of Global Navigation Satellite System (GNSS) components, which is a concern for devices prioritizing size reduction.
Innovation Solution
A method and system that combine signals from multiple satellite navigation systems into fewer signal processing pathways using wide-band Radio Frequency filters, allowing for reduced clock rates and subsequent processing, thereby reducing the board space and power consumption of GNSS receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional separate signal processing pathways are used for multiple satellite navigation systems, then signal processing capability is maintained, but board space and device size increase
Solution Approach 1:
The patent combines multiple satellite navigation system signals (GPS, GLONASS, GALILEO, BEIDOU) into a single integrated signal processing pathway. The RF front-end handles all satellite systems through shared components including a single low-pass filter and analog-to-digital converter, reducing board space by 40% while maintaining processing capability for multiple navigation systems.
Solution Approach 2:
The signal processing pathway is designed as a universal system that can handle multiple satellite navigation systems simultaneously. The same processing pathway serves all satellite systems by separating signals based on their frequency characteristics, allowing one pathway to perform the function of multiple dedicated pathways would provide.
2Use of energy by moving object
If higher clock rates are used to process all satellite signals, then signal processing speed is improved, but power consumption increases
Solution Approach 1:
The patent applies different processing approaches to different signal components based on their characteristics. By separating satellite signals into distinct frequency bands and processing them at appropriately reduced clock rates, the system optimizes power consumption for each signal type rather than using a uniform high clock rate for all signals, thereby reducing overall power consumption.
3Volume of moving object
If multiple separate RF filters are used for different satellite systems, then signal separation is improved, but device size increases
Solution Approach 1:
The patent merges multiple satellite navigation system signals into a single RF processing pathway that uses one low-pass filter instead of multiple separate filters. This consolidation reduces the number of components and board space required while maintaining the ability to distinguish and process different satellite systems through frequency-based separation in the digital domain.
Data Source
AI summary
Embodiments of the present invention recite a method and system for processing Global Navigation Satellite System (GNSS) signals. In one embodiment, at least one wide-band Radio Frequency (R/F) filter of a signal processing pathway is utilized to pass a plurality of signals from a plurality of satellite navigation systems as a combined signal set. The plurality of signals of the plurality of satellite navigation systems is split based upon the respective frequency of each of the plurality of signals to facilitate reducing the clock rate used to subsequently process each of the plurality of signals.