DSP filter. Is prewarping performed when discretizing using Forward/Backward?

1. What is Prewarping effect in DSP?
2. What is Bilinear Transformation in DSP?
3. When to use Bilinear Transformation?

What is Prewarping effect in DSP?

Prewarping. Frequency warping follows a known pattern, and there is a known relationship between the warped frequency and the known frequency. We can use a technique called prewarping to account for the nonlinearity, and produce a more faithful mapping.

What is Bilinear Transformation in DSP?

The bilinear transformation is a mathematical mapping of variables. In digital filtering, it is a standard method of mapping the s or analog plane into the z or digital plane. It transforms analog filters, designed using classical filter design techniques, into their discrete equivalents.

When to use Bilinear Transformation?

The bilinear transform (also known as Tustin's method, after Arnold Tustin) is used in digital signal processing and discrete-time control theory to transform continuous-time system representations to discrete-time and vice versa.