RF Front-End Adaptive Channel Selection for Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Wi-Fi systems suffer from adjacent channel interference (ACI), LTE/5G signal interference, IoT device interference, and other interferences due to the shared use of frequency bands like 2.4 GHz, which affects communication reliability and quality.
Innovation Solution
A radio frequency front-end system with a processing circuit, transceivers, RF front-end circuits, and antennas, which includes switch circuits and filters to adaptively select and filter channels based on usage statuses, thereby reducing interference and improving communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple devices share the same frequency band (2.4 GHz), then the frequency band can be utilized by many applications, but adjacent channel interference and signal interference occur
Solution Approach 1:
The patent segments the frequency band into multiple channels (e.g., channels 1, 6, and 11 in the 2.4 GHz band) that do not overlap with each other. By assigning different non-overlapping channels to different devices or applications, the system allows multiple devices to share the frequency band simultaneously without causing adjacent channel interference, thus resolving the contradiction between frequency band utilization and interference prevention
Solution Approach 2:
The patent applies local quality by making each channel have distinct frequency characteristics and assigning specific channels to specific devices based on their requirements. This allows different parts of the frequency band to serve different purposes with optimized performance for each local segment, enabling versatile utilization while maintaining quality and avoiding interference
2Reliability
If channel filtering is applied to reduce interference, then communication reliability improves, but system complexity increases
Solution Approach 1:
The patent implements dynamic channel selection and filtering where the system continuously monitors channel usage and automatically switches between different channels and filter configurations based on real-time conditions. This dynamic approach maintains high communication reliability by adapting to changing interference patterns while avoiding the need for complex static filtering systems for all possible scenarios
Solution Approach 2:
The patent changes operational parameters such as channel frequency, bandwidth, and filter characteristics based on detected interference levels and usage patterns. By dynamically adjusting these parameters rather than using fixed complex filtering, the system achieves reliable communication while keeping the overall system design simpler and more adaptable
Data Source
AI summary
A radio frequency (RF) front-end system and a method for reducing interference are provided. The RF front-end system includes a processing circuit, a first transceiver, an RF front-end circuit, and a first antenna. The RF front-end circuit includes a first switch circuit, a first filter circuit, and a second switch circuit. The first switch circuit and the second switch circuit respectively include first signal paths and second signal paths. The first filter circuit includes an all-pass circuit corresponding to a first frequency band and a first channel filter corresponding to a first frequency channel. The processing circuit executes an anti-interference process, including: switching to the all-pass circuit; executing a channel sounding process to determine usage statuses of a plurality of channels; executing an automatic channel selection process to select a target channel; and switching to the target channel, and controlling the first transceiver to perform signal transmission.