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Freqz - PowerPoint PPT Presentation

>> n=-50:50; wc=0.4pi; >> hn=sinc(nwc/pi)*wc/pi;

>> n=-50:50; wc=0.4*pi; >> hn=sinc(n*wc/pi)*wc/pi; >> stem(n,hn); title('Ideal LPF with cutoff frequency = 0.4 pi'). >> w=linspace(0,pi,512); mag_hw= cos (w/2); >> [h,w1]=freqz([0.5 0.5],[1]); >> subplot(2,1,1); plot(w/pi,mag_hw);title('|H(omega)|of first order FIR LPF:analytical solution')

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?????????? [N,Wn]=buttord(wp,ws,Rp,Rs); wp,ws ???????????? [N,Wn]=buttord(wp,ws,Rp,Rs,'s');

Matlab ? IIR ???????????. ?????????? [N,Wn]=buttord(wp,ws,Rp,Rs); wp,ws ???????????? [N,Wn]=buttord(wp,ws,Rp,Rs,'s'); wp,ws ??? rad/s ??????????? [Z,P,K]=buttap(N); ????????????????? [Bap,Aap]=zp2tf(Z,P,K);. ??????????????????????? [b,a]=lp2lp(Bap,Aap,Wn); ??????????????????????

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MATLAB DSP Programs

MATLAB DSP Programs. Raja Rajasakeran Venkat Peddigari Pete Bernardin. Bandpass Filter. close all; clear all; r1 = 0.9; r2 = 0.88; r3=0.9; theta1 = pi/5; theta2 = 3*pi/10; theta3=4*pi/10; p1 = r1*cos(theta1) + i*r1*sin(theta1); p2 = r1*cos(theta2) + i*r2*sin(theta2);

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Freqz - PowerPoint PPT Presentation

&gt;&gt; n=-50:50; wc=0.4*pi; &gt;&gt; hn=sinc(n*wc/pi)*wc/pi;

?????????? [N,Wn]=buttord(wp,ws,Rp,Rs); wp,ws ???????????? [N,Wn]=buttord(wp,ws,Rp,Rs,'s');

MATLAB DSP Programs

>> n=-50:50; wc=0.4pi; >> hn=sinc(nwc/pi)*wc/pi;