Dynamic Slew Rate Control for Wireless Interference Reduction
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Solution Overview
Problem
Existing techniques for reducing interference from wired communications channels to wireless communications channels, such as low-pass filtering and changing the slew rate, often result in signal distortion and are not optimized for different modes and frequency ranges, leading to ineffective interference reduction.
Innovation Solution
A computer-implemented method that dynamically adjusts the slew rate of signals in a wired communications channel based on the mode and frequency characteristics of both the wired and wireless communications channels, using a mapping table to select an optimal slew rate that minimizes high-frequency interference without significant signal distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a low-pass filter is applied to suppress high-frequency content in the wired communications channel, then interference with the wireless communications channel is reduced, but signal distortion occurs for certain transmission modes
Solution Approach 1:
The patent applies dynamics by making the slew rate adjustable based on the operating mode. Instead of using a fixed low-pass filter that causes signal distortion for certain modes, the system dynamically changes the slew rate according to the detected transmission mode (e.g., 1080p, 4K, 8K video modes). This allows the system to suppress high-frequency interference when needed while maintaining signal integrity for modes that are sensitive to filtering.
Solution Approach 2:
The patent changes the physical parameter of slew rate based on the transmission mode. By detecting the operating mode and selecting an appropriate slew rate from a mapping table, the system adjusts the rate of change of the signal. This parameter change allows suppression of high-frequency content that causes interference while preserving the signal quality required for different video modes, avoiding the signal distortion problems associated with fixed low-pass filtering.
2Object-affected harmful factors
If a fixed slew rate is applied to reduce high-frequency interference, then interference suppression is improved, but data transmission reliability deteriorates for certain modes
Solution Approach 1:
The system dynamically adjusts the slew rate based on the detected transmission mode rather than using a fixed value. The mapping table stores different slew rate values corresponding to different modes (e.g., USB 3.1, HDMI video modes). This dynamic adjustment ensures that the interference suppression is optimized for each mode while maintaining data transmission reliability, preventing the reliability deterioration that occurs with fixed slew rate application.
Solution Approach 2:
The patent changes the slew rate parameter according to the operating mode to balance interference suppression and transmission reliability. By selecting appropriate slew rate values from the mapping table based on the detected mode, the system optimizes the trade-off between reducing high-frequency interference and maintaining signal integrity for reliable data transmission in each specific mode.
3Object-affected harmful factors
If the slew rate is increased to suppress interference for one frequency range, then interference reduction is improved, but interference suppression effectiveness deteriorates for other frequency ranges
Solution Approach 1:
The patent changes the slew rate parameter based on the detected wireless channel frequency range. The mapping table contains slew rate values optimized for different frequency ranges (e.g., 2.4 GHz, 5 GHz, 6 GHz Wi-Fi bands). By detecting which frequency range is in use and selecting the corresponding slew rate, the system achieves effective interference suppression for the active frequency range while maintaining adaptability to other ranges when they become active.
Solution Approach 2:
The mapping table structure provides universality by storing slew rate values that cover multiple frequency ranges and transmission modes. This single data structure enables the system to adapt to different wireless channel conditions and wired interface modes, making the interference suppression mechanism universally effective across multiple frequency ranges rather than being optimized for just one.
Data Source
AI summary
Various embodiments include techniques for reducing high-frequency interference to a wireless communications channel emanating from a wired communications channel. The techniques are directed towards an application that determines a mode of a particular wired communications channel. The mode of the wired communications channel is indicative of the frequency ranges at which the interference is generated. The application further determines a frequency and/or bandwidth of the wireless communications channel. The application selects a slew rate that reduces the high frequency interference from the wired communications channel at the frequency and/or bandwidth of the wireless communications channel. The application thereby optimizes the reduction of the high-frequency interference from the particular wired communications channel to the particular wireless communications channel.