% Usage: qp_kaiser (nb, at, linear) % % Computes a finite impulse response (FIR) filter for use with a % quasi-perfect reconstruction polyphase-network filter bank. 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. % % By using a third non-null argument, the minimum-phase calculation is % ommited at all.