Explore MATLAB source code curated for "跳频信号" with clean implementations, documentation, and examples.
3D surface visualization of Wigner-Ville Distribution for frequency-hopping signals, including STFT-based time-frequency analysis and spectrogram generation of Wigner-Ville Distribution for FH signals
This project implements hop period estimation for frequency-hopping signals using STFT (Short-Time Fourier Transform). The process involves simulating a frequency-hopping signal, analyzing it through STFT to obtain a time-frequency matrix, extracting the time plane, removing DC components from the time series, performing Fourier transformation, and ultimately calculating the hop period. The implementation includes key signal processing functions such as windowing, spectral analysis, and peak detection algorithms.
In this system, the information sequence undergoes FSK modulation first, followed by a low-pass filter with 25kHz cutoff frequency to constrain signal bandwidth. The filtered signal is then upconverted via a mixer to higher transmission frequencies. At the receiver, synchronized frequency-hopping signals perform downconversion (de-hopping occurs here), with lower sideband extraction preceding FSK demodulation. Implementation involves digital signal processing algorithms for modulation/demodulation and mixer operations using trigonometric functions.
MATLAB source code M-file for producing frequency hopping signals, featuring excellent functionality for frequency hopping communication applications with comprehensive implementation details