Dynamic Notch Filter Configuration for Spurious Emission Mitigation
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Solution Overview
Problem
Wireless communication devices face performance degradation due to spurious emissions from unknown or unexpected sources, which preconfigured notch filters fail to mitigate effectively, leading to signal interference and inefficient use of system resources.
Innovation Solution
A method involving initial and deep scans of the RF spectrum to dynamically configure a notch filter based on signal strength thresholds, allowing real-time identification and mitigation of spurious emissions without user intervention, using software notch filters that can be dynamically adjusted to attenuate unwanted signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If preconfigured notch filters are used to suppress undesired signals, then signal interference from known frequency bands is reduced, but the system cannot mitigate spurious emissions from unknown frequency bands and system resources are inefficiently used
Solution Approach 1:
The patent implements dynamic notch filter configuration where filter parameters (center frequency, bandwidth, depth) are adjusted in real-time based on detected spurious emissions. The system performs frequency scans, identifies spurs, and reconfigures notch filters accordingly, transforming the static filter system into a dynamic adaptive one that responds to changing spectral conditions
Solution Approach 2:
The system employs feedback mechanisms by continuously monitoring the RF spectrum, detecting spurious emissions, and using this information to reconfigure notch filters. The detection results feed back into the filter configuration process, creating a closed-loop system that adapts to newly identified interference sources
2Adaptability or versatility
If dynamic notch filter configuration is implemented to mitigate spurious emissions, then adaptability to unknown frequency bands is improved, but device complexity increases
Solution Approach 1:
The system performs self-configuration by automatically detecting spurious emissions and reconfiguring its own notch filters without external intervention. The device monitors its own spectral environment, identifies interference sources, and adjusts its filter parameters autonomously, reducing the need for complex external control mechanisms
Solution Approach 2:
The patent implements preliminary frequency scanning and spur detection before finalizing notch filter configuration. By performing initial scans and identifying potential spurious emissions in advance, the system prepares filter settings proactively, reducing the complexity of real-time adjustments when interference is detected
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A device, which may be otherwise known as user equipment (UE), may support spurious emission attenuation. A device may determine, based on a first frequency scan on a radio frequency (RF) spectrum band, that a signal strength of a signal at a frequency of the RF spectrum band satisfies a threshold. The device may perform, based on the first frequency scan on the RF spectrum band, a second frequency scan on the RF spectrum band to determine whether the signal strength of the signal at the frequency of the RF spectrum band satisfies the threshold during the second frequency scan. Subsequently, the device may determine that the signal is a spurious emission at the frequency based on the signal strength of the signal, and configure a notch filter for mitigating the spurious emission at the frequency.