DFT: Pulse Width and Zero-crossings (Bandwidth)

Building the Cantata Workspace

1. Create "box" like images and display them using the operators Constant Pad Display Image. Let one of the images be a vertical rectangle of certain width and the other a horizontal rectangle of certain height.
2. Take the forward Fourier transform of both images using FFT and display the results.
3. Extract the portion of the images containing meaningful information and perform the magnitude operation on them. Use the operators Extract and Magnitudes. Also, display and plot your results using Display Image and 2D Plot.
4. Determine the statistics and print the data to the display by using the following operators: Statistics, Print Data, and File Viewer.

Exercises

• Therefore, what is bandwidth?
• Perform a similar experiment by modifying the width, heigth or both dimensions of a rectangular image.
• Instead of a box, create your own image and perform a similar experiment.