Signal Processing Toolbox

A versatile Qt-based toolkit offering essential signal processing functionalities, including waveform generation, time-domain visualization, Fourier analysis, and filtering.

Features

• Waveform Generation: Create various waveforms to simulate different signals:

  • Sine Wave: Represents a pure frequency with no harmonics, ideal for testing linear systems.
  • Square Wave: Contains odd harmonics, commonly used in digital signal applications.
  • Triangle Wave: Linear rise and fall, often used to test the linearity of systems.
  • Sawtooth Wave: Contains both even and odd harmonics, suitable for sound synthesis and analysis.
  • White Noise: Random signal with a flat frequency spectrum, useful for testing system response.

• Time-Domain Visualization: Interactive plots to view signals over time using QCustomPlot. Features include:

  • Zoom and Pan: Easily zoom in on specific portions of the signal and pan across the timeline.
  • Dynamic Updates: Real-time plotting capabilities to visualize signals as they are generated.

• Frequency-Domain Analysis: Fast Fourier Transform (FFT) visualization with magnitude plotting:

  • FFT Calculation: Computes the frequency spectrum of the input signal to analyze its frequency components.
  • Magnitude Plotting: Visualizes the magnitude of different frequency components in decibels (dB).
  • Interactive Frequency Plots: Zoom and pan across the frequency domain for detailed analysis.

• Filtering: Apply digital filters to signals for real-time signal processing:

  • Low Pass Filter: Removes high-frequency components, allowing low-frequency components to pass through.
  • High Pass Filter: Removes low-frequency components, allowing high-frequency components to pass through.
  • Adjustable Parameters: Customize cutoff frequency and sampling frequency to achieve desired filtering effects.

• WAV File Support: Load and analyze WAV files to visualize and process audio signals:

  • File Import: Import WAV files for playback and signal analysis.
  • Graphical Analysis: Plot the time-domain waveform and apply FFT to visualize the frequency components.
  • Playback Controls: Play, pause, and stop audio files with real-time graphical updates.

Installation

1. Clone the repository:

   git clone https://github.com/umutonuryasar/Signal-Processing-Toolbox.git
   

2. Install dependencies (Qt, FFTW, QCustomPlot).
   • Qt: Install Qt Creator or the Qt libraries.
   • FFTW: Install the FFTW library for performing Fourier transforms.
   • QCustomPlot: Include QCustomPlot for plotting functionalities.
3. Build and run using Qt Creator or a preferred IDE.

Usage

• Generate Signals: Create different waveforms (sine, square, triangle, sawtooth, white noise) and visualize them in the time domain.
• Visualize Time Domain: View generated signals in the time domain with interactive zoom and pan features.
• Analyze Frequency Domain: Compute the FFT of generated or imported signals to view their frequency components.
• Apply Filters: Use low-pass or high-pass filters to modify the generated signals and observe their real-time effects.
• Load WAV Files: Import WAV files to visualize and analyze their time and frequency domain representations.
• Playback Audio: Play loaded WAV files with synchronized time-domain and frequency-domain plots.

Dependencies

• Qt: GUI framework for building the user interface and managing interactions.
• FFTW: Fast Fourier Transform library for efficient computation of FFT.
• QCustomPlot: Plotting library for interactive time-domain and frequency-domain graphs.

License

Licensed under the GNU GPL-3.0 License.