Digital Filter Design Process Overview (Digital Filter Design Toolkit)

Digital filter design involves the following three steps:

1. Specifying the design method and target digital filter attributes, or the characteristics you want the digital filter to possess.
2. Analyzing the characteristics of the floating-point digital filter you designed in Step 1.
3. Implementing the filter on fixed-point targets with finite-precision arithmetic.

The design process is iterative. You usually experiment with different design specifications or design methods to obtain the appropriate digital filter for an application. Sometimes you might need to revise the specifications or modify the design method after you simulate the filter, especially when designing fixed-point filters.