Plotting Spectrograms Using Short-Time Fourier Transform (STFT)
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Resource Overview
Implementation of Short-Time Fourier Transform (STFT) based spectrogram plotting in MATLAB environment
Detailed Documentation
In the MATLAB environment, we can utilize the Short-Time Fourier Transform (STFT) to create spectrograms. STFT is a MATLAB-based signal processing technique that converts time-domain signals into frequency-domain representations and displays them graphically. By plotting spectrograms, we can visually observe signal variations across different frequencies and time intervals. The implementation typically involves using MATLAB's built-in functions such as spectrogram() which applies a sliding window to segment the signal, performs Fourier transform on each windowed segment, and visualizes the results using a colormap. Key parameters include window size (controlling time-frequency resolution trade-off), overlap between segments (reducing edge effects), and frequency range selection. This approach enables effective spectrogram visualization and analysis for various signal processing applications.
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