Examples
qp_kaiser (5, 5, 1) ans = 0.11591 0.25606 0.25606 0.25606 0.11591 |  |  |
Computes a finite impulse response (FIR) filter for use with a quasi-perfect reconstruction polyphase-network filter bank.
qp_kaiser (nb, at, linear) qp_kaiser (nb, at)
Number of bands
Attenuation
When not zero, minimum-phase calculation is omitted.
This is an Octave function. This version utilizes a Kaiser window to shape the frequency response of the designed filter. Tha number nb of bands and the desired attenuation at in the stop-band are given as parameters.
The Kaiser window is multiplied by the ideal impulse response h(n)=a.sinc(a.n) and converted to its minimum-phase version by means of a Hilbert transform.
qp_kaiser (5, 5, 1) ans = 0.11591 0.25606 0.25606 0.25606 0.11591 | | |