Filter Design Using Window Method
Designing High-Pass, Low-Pass, and Band-Pass Filters with Window Functions
Explore MATLAB source code curated for "低通" with clean implementations, documentation, and examples.
Designing High-Pass, Low-Pass, and Band-Pass Filters with Window Functions
Digital filters are computational systems that process digital signals to modify frequency components by altering their relative proportions or eliminating specific frequencies. Classic digital filters are categorized by their frequency response characteristics into low-pass, high-pass, band-pass, and band-stop types. The magnitude response illustrates amplitude attenuation across frequencies, while the phase response indicates time delays introduced by the filter. This course project introduces Chebyshev digital bandpass filter theory and implements a design using MATLAB's buttord and butter functions to analyze performance metrics through loss function and phase response visualizations.
This MATLAB function implements Kaiser window-based design for low-pass, band-pass, and high-pass filters with unified graphical display. The package includes required impulse functions and impulse response functions, operating with digital frequency values. The implementation allows parameter adjustment for optimal filtering performance, including window length and cutoff frequency configuration.
% y = filter(sig, fmin, fmax, fs) % Performs ideal filtering on a signal to achieve low-pass or band-pass filtering functionality % sig: input signal to be filtered % fmin: lower cutoff frequency (when fmin=0, implements low-pass filter; when fmin>0, implements band-pass filter) % fmax: upper cutoff frequency (must satisfy fmax > fmin) % fs: sampling frequency of the input signal % y: filtered output signal
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