GNSS Board Narrowband Interference Suppression via Dynamic Pathway Switching
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Solution Overview
Problem
Current GNSS technologies face challenges in effectively addressing narrowband interference, which affects the reliability and accuracy of global navigation satellite systems.
Innovation Solution
A GNSS board with a narrowband interference suppression module that includes an interference suppression pathway, a bypass pathway, an interference control switch, and a data strobe switch, utilizing signal conversion, interference detection, and interference processing modules to convert intermediate frequency signals, detect interference, and perform suppression processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If narrowband interference suppression processing is always performed, then interference cancellation capability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic switching between interference suppression pathway and bypass pathway based on real-time interference detection. The system transitions from static always-on suppression to dynamic conditional processing, activating the interference suppression function only when interference is detected, thereby reducing unnecessary power consumption while maintaining reliability when needed
Solution Approach 2:
The system changes the operational state parameter of the signal processing pathway based on interference conditions. When interference is detected, the system switches to interference suppression mode; when no interference is present, it switches to bypass mode. This parameter change enables adaptive power management while maintaining interference cancellation capability when required
2Reliability
If interference suppression pathway is used, then narrowband interference is canceled, but processing time increases
Solution Approach 1:
The patent employs dynamic pathway switching that transitions the signal processing route based on interference detection results. When interference is present, the system dynamically routes signals through the interference suppression pathway; when absent, it dynamically routes through the bypass pathway, minimizing processing time while ensuring interference suppression when necessary
Solution Approach 2:
The patent extracts the interference suppression function as a separate, optional pathway rather than making it integral to all signal processing. This allows the system to bypass the interference suppression processing entirely when interference is not detected, reducing processing time while maintaining the capability to suppress interference when needed
3Adaptability or versatility
If dual pathway architecture with switching is implemented, then adaptive interference suppression is achieved, but device complexity increases
Solution Approach 1:
The patent segments the signal processing system into distinct functional modules: interference detection module, interference suppression pathway, bypass pathway, and switching control mechanism. This segmentation allows each component to perform its specific function independently, making the complex adaptive system more manageable and maintainable while achieving interference suppression adaptability
Data Source
AI summary
A GNSS board comprises a narrowband interference suppression module comprising an interference suppression pathway to receive an intermediate frequency (IF) signal, a bypass pathway to receive an intermediate frequency signal, an interference control switch, and a data strobe switch, wherein,the interference suppression pathway includes a signal conversion module, an interference detection module and an interference processing module, wherein the signal conversion module converts the intermediate frequency signal from a time domain signal to a frequency domain signal; the interference detection module determines whether there is interference with the frequency domain signal, and in the case of interference, obtains interference frequency information, makes the interference control switch close and the data strobe switch switch from the bypass pathway to the interference suppression pathway; and the interference processing module performs interference suppression processing on the frequency domain signal based on the interference frequency signal to obtain an interference-canceled IF signal output by the data strobe switch; the interference detection module makes the interference control switch open and the data strobe switch connect to the bypass pathway in the case of no interference.