Communication Apparatus Sampling Point Calculation for Ringing
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Solution Overview
Problem
Communication data is not normally restored during high-speed communication due to waveform distortion caused by ringing, which occurs when the signal level changes, leading to decoding issues in communication systems.
Innovation Solution
A communication apparatus that detects a specific bit with an inverse logical value during low-speed communication, records its signal waveform, and calculates a sampling point for high-speed communication based on this waveform and logical value to accurately decode bits despite ringing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If communication speed is increased to improve data transmission efficiency, then productivity is improved, but waveform distortion occurs due to ringing causing data restoration failure
Solution Approach 1:
The patent applies preliminary action by detecting a specific bit during low-speed communication and recording its signal waveform in advance. This pre-recorded waveform information is then used to determine the sampling point during high-speed communication, allowing the system to compensate for ringing effects before they occur at higher speeds.
Solution Approach 2:
The patent changes the sampling timing parameter based on the detected specific bit waveform. By adjusting the sampling point according to the recorded low-speed waveform characteristics, the system adapts to ringing effects when operating at high communication speeds, maintaining data restoration accuracy despite speed increases.
2Productivity
If communication speed is switched to high speed to improve transmission efficiency, then productivity is improved, but waveform distortion causes decoding issues
Solution Approach 1:
The system performs preliminary detection of a specific bit during low-speed communication and records its waveform characteristics before switching to high-speed mode. This advance preparation provides reference information that simplifies accurate decoding during high-speed operation despite ringing-induced waveform distortion.
Solution Approach 2:
The recorded specific bit waveform acts as an intermediary reference that bridges the low-speed detection phase and high-speed decoding phase. This intermediate reference signal allows the system to accurately determine sampling points during high-speed communication without directly measuring the distorted high-speed signal alone.
3Device complexity
If sampling point is fixed to simplify high-speed decoding, then device complexity is reduced, but waveform distortion from ringing causes data restoration failure
Solution Approach 1:
The system performs preliminary waveform detection during low-speed communication and stores this information for later use. This pre-acquired reference eliminates the need for complex real-time waveform analysis during high-speed decoding, maintaining simple decoding logic while improving reliability through the pre-recorded specific bit waveform reference.
Data Source
AI summary
In a communication apparatus, a specific bit is detected from a communication data decoded in a low-speed state of a communication speed. The specific bit is a bit having undergone an inverse change in a logical value. A signal waveform of the communication signal is acquired, which is recorded in a memory and corresponds to the specific bit. Then, a sampling point of the communication signal in a high-speed state of the communication signal is calculated based on (i) the acquired signal waveform and (ii) a logical value of the specific bit.