Signal Processing Toolbox

Filtering and Analysis of Noise

The following sections provide an example of using the GUI-based interactive tools to:

• Design and implement an FIR bandpass digital filter
• Apply the filter to a noisy signal
• Analyze signals and their spectra

The steps include:

1. Creating a noisy signal in the MATLAB workspace and importing it into SPTool
2. Designing a bandpass filter using the Filter Designer
3. Applying the filter to the original noise signal to create a bandlimited noise signal
4. Comparing the time domain information of the original and filtered signals using the Signal Browser
5. Comparing the spectra of both signals using the Spectrum Viewer

Opening the Spectrum Viewer

Step 1: Importing a Signal into SPTool