Digital Filtering

This section will cover digital (discrete) filter theory, design and practical tips on application.

• FFT

  Learn how to apply a Fast Fourier Transform and understand its output.

• Aliasing

  Understand aliasing and how to avoid it.

• FIR vs IIR

  Learn about Finite and Infinite Impulse Response Filters.

• Second Order Sections

  Understand the numerical benefits of Second Order Section Filters.

• Software

  Digital Filter C/C++ Implementation Example.

• Design

  Learn how to design digital filters using MATLAB.

• Practical Considerations

  Tips and Tricks on Implementing Filters.

Clone GNCTools to access the examples and source code for the above links. Example code can be found in Control/Filter/Filter_Examples.m.

Nomenclature

The following diagram shows the format of the GNCTools digital filter, together with variable naming.

Variable	GNC Tools Name
u	Input
y	Output