Explore MATLAB source code curated for "工频干扰" with clean implementations, documentation, and examples.
ECG signal preprocessing techniques using high-pass filter for respiratory baseline drift removal and band-stop filter for power line interference cancellation, with computational efficiency comparison between filter implementations
Utilizing adaptive notch filters to eliminate power frequency interference in communication systems. The analysis focuses on key parameters including the step size factor in LMS algorithm, frequency difference between signal and interference, amplitude and phase of reference input for single-frequency notch filtering. Using dual-frequency interference as an example, the characteristics of cascaded multi-frequency notch filters are discussed, demonstrating successful signal recovery and stable error convergence after two-stage filtering. Implementation considerations include optimal parameter selection and filter cascade design for real-time signal processing.
This experiment designs two sets of filters through different methodologies to filter ECG signals from data, eliminating power frequency interference, muscle tremor noise, and respiratory baseline drift. The study analyzes which filter group better meets practical application requirements, with enhanced descriptions of filter implementation strategies and algorithm selection.
This successfully tested ECG data filtering code effectively removes powerline interference and baseline wander, featuring implementation details for signal processing algorithms and key MATLAB functions.
Implementing adaptive filtering techniques to eliminate 50Hz power line interference during EEG signal acquisition with code implementation insights
MATLAB Implementation of FIR Filter for Removing 50Hz Power Line Interference from Speech Signals with Code Implementation Details