Explore MATLAB source code curated for "幅值" with clean implementations, documentation, and examples.
This MATLAB-based implementation utilizes S-transform for detecting short-term power quality disturbances, specifically designed to analyze voltage sag characteristics including magnitude, phase variations, duration, and harmonic components.
After applying Empirical Mode Decomposition, three-dimensional plots can be generated using instantaneous frequency, time, and amplitude as coordinates to visualize signal characteristics.
Using FFT (Fast Fourier Transform) to compute amplitude and phase angles of harmonic components in signals, with code implementation details.
The RELAX algorithm for harmonic detection, superior to FFT, enables effective estimation of amplitude, frequency, and phase with robust signal parameter identification capabilities.
Power grid harmonic analysis employing Hamming window interpolation for precise calculation of harmonic frequency, amplitude, and phase angle. This method is built upon Fast Fourier Transform (FFT) fundamentals and incorporates advanced interpolation techniques to enhance measurement accuracy beyond standard FFT implementations. The algorithm effectively reduces spectral leakage through windowing functions while improving frequency resolution through polynomial interpolation between FFT bins.
Multi-frequency testing program utilizing all-phase FFT (apFFT) with time-shift phase difference method, containing 5 built-in frequency components. This implementation provides highly accurate amplitude, frequency, and phase estimation with excellent simulation precision. The algorithm employs advanced windowing techniques and phase correction mechanisms to minimize spectral leakage and improve measurement accuracy.
Implementing Prony's method to extract harmonic amplitude, frequency, and phase from arbitrary discrete signals, along with DC component characteristics
Time-domain analysis of speech signals including time-domain spectrum, short-time zero-crossing rate analysis, short-time amplitude, short-time energy, and autocorrelation function with implementation approaches
A key function within a Chinese-developed HHT implementation that calculates instantaneous frequency and amplitude parameters