fd2fa

Bilinear transform frequency warping (digital to analog).

Namespace: dsp::filter

Prototype

float fd2fa(float fd)

Parameters

fd	Digital frequency (between 0 et 0.5)

Returns

Analog frequency (unbounded, positive)

Description

The analog frequency is computed as: \[ f_a = \frac{\tan(\pi f_d)}{\pi} \]

This mapping is the one caused by the bilinear transform.

See also