PPG Signal Parameter Synchronization for Accurate Digital Restoration
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Solution Overview
Problem
In signal processing systems, particularly for photoplethysmography (PPG) signals, significant errors occur due to the analog front end failing to promptly update parameter information, leading to incorrect digital signal restoration and measurement values.
Innovation Solution
A method involving a first processing module that updates parameter information and sets a target identifier for digital signals, allowing the second processing module to process signals based on the correct parameter information, distinguishing between signals processed with different parameter sets to reduce errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the analog front end updates parameter information promptly upon receiving new parameters from the microcontroller unit, then the measurement accuracy of the PPG signal is improved, but the complexity of the parameter update synchronization mechanism increases
Solution Approach 1:
The patent applies preliminary action by having the analog front end proactively send a parameter update notification to the microcontroller unit before actually updating the parameters. This allows the microcontroller unit to prepare and send the new parameter information in advance, ensuring that both components are synchronized before processing begins, thereby improving measurement accuracy without requiring complex real-time synchronization mechanisms
Solution Approach 2:
The patent implements feedback through the parameter update notification mechanism. The analog front end sends a notification to the microcontroller unit when parameters are about to be updated, creating a feedback loop that ensures the microcontroller unit receives and processes the update information before the analog front end actually applies the new parameters. This feedback mechanism maintains synchronization between the two components while keeping the system architecture relatively simple
2Productivity
If the microcontroller unit restores the digital signal based on updated parameter information while the analog front end uses pre-update parameters, then the processing speed is improved, but significant errors occur in the measurement value
Solution Approach 1:
The patent applies preliminary action by having the microcontroller unit receive and prepare the new parameter information in advance upon receiving the parameter update notification from the analog front end. This allows the microcontroller unit to be ready with the correct parameters before the analog front end updates them, ensuring that both components use consistent parameter sets during signal processing, thereby preventing measurement errors while maintaining processing speed
Solution Approach 2:
The patent implements feedback through the notification mechanism that triggers the parameter update process. When the analog front end sends a parameter update notification, the microcontroller unit responds by preparing and sending the new parameters back to the analog front end. This feedback loop ensures that both components are synchronized on the same parameter set, preventing the mismatch that would otherwise cause significant measurement errors
Data Source
AI summary
A method for processing a signal, a method for acquiring data, an electronic device, and a storage medium are provided. The method includes: processing, based on first parameter information stored in a parameter register, an analog signal obtained by sampling a to-be-measured signal to obtain a first digital signal; replacing, when receiving second parameter information sent by a second processing module, the first parameter information in the parameter register with the second parameter information; and processing the analog signal obtained by sampling the to-be-measured signal, based on the second parameter information stored in the parameter register to obtain a second digital signal, and setting a target identifier for a first digital signal of the second digital signal obtained through processing based on the second parameter information.