MIPI Signal Anti-Interference Using RF Reverse-Phase Cancellation
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Solution Overview
Problem
Radio frequency signals emitted by a radio frequency module in electronic devices interfere with mobile industry processor interface (MIPI) signals, leading to degradation in transmission quality and display issues such as stuttering and distortion.
Innovation Solution
A signal anti-interference method that generates a reverse signal with the same amplitude and opposite phase to the radio frequency signal, which is superimposed onto the MIPI signal to eliminate interference without occupying additional internal space, reducing the device's volume, weight, and manufacturing costs while improving noise reduction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radio frequency module is added for communication functions, then communication capability is improved, but radio frequency signal interference on MIPI signal increases
Solution Approach 1:
The patent captures the harmful radio frequency signal coupled on the second signal line and converts it into a useful reference for generating the reverse signal. By using the actual coupled RF signal as the basis for creating the anti-phase cancellation signal, the system transforms the interference problem into a solution where the harmful RF energy becomes the source of the counteracting force needed to eliminate interference on the MIPI signal line.
Solution Approach 2:
The system generates a reverse signal with opposite phase before the RF interference fully degrades the MIPI signal quality. By continuously monitoring the coupled RF signal on the second line and preemptively generating the counter-phase signal, the system applies anti-action in advance to cancel out the interference before it causes significant harm to the first signal line.
2Reliability
If additional anti-interference components are added, then noise reduction efficiency is improved, but device volume and weight increase
Solution Approach 1:
The patent merges the anti-interference functionality with the existing signal line infrastructure by utilizing the second signal line as both a functional signal line and a source for capturing RF interference. The reverse signal generation is integrated into the existing communication architecture, eliminating the need for separate dedicated anti-interference hardware components and reducing overall device weight.
Solution Approach 2:
The second signal line serves multiple functions: it carries its intended signal while simultaneously serving as a source for capturing RF interference to generate the cancellation signal. This multi-functionality reduces the need for dedicated anti-interference components, thereby maintaining noise reduction efficiency without increasing device weight.
3Manufacturing precision
If additional anti-interference components are added, then transmission quality is improved, but manufacturing costs increase
Solution Approach 1:
The system uses its own coupled RF signal from the second signal line to generate the reverse cancellation signal, making the anti-interference mechanism self-sufficient. This self-service approach eliminates the need for external or additional complex anti-interference components, thereby improving transmission quality while keeping manufacturing costs low.
4Object-affected harmful factors
If reverse signal generation is implemented, then radio frequency signal elimination is improved, but device complexity increases
Solution Approach 1:
The patent uses the second signal line and its coupled RF signal as an intermediary to bridge the interference problem on the first signal line and the solution. By capturing the RF characteristics through the second line and using them to generate the reverse signal, the system creates a mediated solution that simplifies the overall architecture compared to direct monitoring and cancellation approaches.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively eliminates radio frequency interference on MIPI signals, enhancing transmission quality and reducing manufacturing costs without increasing the device's size or weight.
Implementation Method 1
The electronic device determines a first signal based on the detection signal, where waveform information of the first signal is the same as waveform information of the first radio frequency signal, an amplitude value of the first signal is the same as an amplitude value of the first radio frequency signal, and a phase of the first signal differs 180 degrees from a phase of the first radio frequency signal
Implementation Method 2
The electronic device eliminates the first radio frequency signal in the first processing signal based on the first signal
Data Source
AI summary
This application discloses a signal anti-interference method and an electronic device, and relates to the field of terminals. A system-on-chip (SoC) chip may obtain parameter information (for example, an amplitude of a radio frequency signal, a phase of the radio frequency signal, a waveform of the radio frequency signal and the like) of the radio frequency signal coupled on a mobile industry processor interface (MIPI) signal line. Based on the parameter information of the radio frequency signal, the SoC chip may generate a reverse signal of the radio frequency signal, where the reverse signal is the same as the radio frequency signal in amplitudes (which may also be referred to as amplitude values) and waveforms and opposite in phases. The SoC chip may superimpose the reverse signal with a signal transmitted by the MIPI signal line, to eliminate the radio frequency signal coupled on the MIPI signal line.