The Least Squares Polynomial Fitting Design Denoise Based on the Volume Pulse Wave Detection System / 中国医学物理学杂志

Purpose: Use of BCI clip-on probe for blood volume transmission pulse wave detection, through the signal conditioning amplifier circuit, A/D conversion circuit, microcontroller and interfaces to collected data to the PC. The applications of software filtering to improve hardware filtering. Methods: This article is carried out in MATLAB based on the least squares polynomial fitting of the low-pass FIR filter denoising simulation. Results: Removal of well-frequency and other interference, access to clean pulse volume waveform. Conclusion: To facilitate real-time display in the interface and for the latter part of the feature extraction and parameter calculation