7/23/2019 matlab example programs

1/15

%Design of FIR Band Stop Filter withTriangular Window

clear all

clcfs=5000;f1=2*1000/fs;f2=2*2000/fs;fn=[f1 f2];n=30;

win=window(@triang, n+1);s!"lot(221);ste#(win,$r$);grid on;%la!el(&ti#e$);'la!el(&a#"$);title(&rianglar indow$);

!=rl(n,fn,$!andsto"$,win);s!"lot(222);ste#(!,$$);grid on;%la!el(&ti#e$);

'la!el(&a#"$);title("lse -es"onse$);[. o#]=fre(!);

s!"lot(223);"lot(o#/(2*"i)*fs,20*log10(a!s(.)),$#$);

grid on;

7/23/2019 matlab example programs

2/15

%la!el(&freenc'$);'la!el(ag$);title(&agnitde -es"onse$);

s!"lot(22);"lot(o#/(2*"i)*fs,nwra"(angle(.))*543,$!$);grid on;%la!el(&frenc'$);'la!el(&".ase$);

title(&.ase -eas"onse$);

7/23/2019 matlab example programs

3/15

%Design of FIR Band Pass Filter withHanning Window

clear all

clcfs=5000;f1=2*1000/fs;f2=2*2000/fs;fn=[f1 f2];n=66;win=window(@.a##ing, n+1);s!"lot(221);ste#(win,$r$);grid on;%la!el(&ti#e$);'la!el(&a#"$);title(&7a##ing indow$);

!=rl(n,fn,$!and"ass$,win);s!"lot(222);ste#(!,$$);grid on;%la!el(&ti#e$);

'la!el(&a#"$);

7/23/2019 matlab example programs

4/15

title("lse -es"onse$);[. o#]=fre(!,1,512);

s!"lot(223);"lot(o#/(2*"i)*fs,20*log10(a!s(.)),$#$);grid on;%la!el(&freenc'$);'la!el(ag$);title(&agnitde -es"onse$);

s!"lot(22);"lot(o#/(2*"i)*fs,nwra"(angle(.))*543,$!$);grid on;%la!el(&freenc'$);'la!el(&".ase$);title(&.ase -es"onse$);

7/23/2019 matlab example programs

5/15

%Design of FIR High Pass Filter withHamming Window

clear allclcfs=2000;f"=500;fn=2*f"/fs;n=30;win=window(@.a##ing, n+1);s!"lot(221);ste#(win,$r$);

grid on;%la!el(&ti#e$);'la!el(&a#"$);title(&7a##ing indow$);

!=rl(n,fn,$.ig."ass$,win);

s!"lot(222);

7/23/2019 matlab example programs

6/15

ste#(!,$$);grid on;%la!el(&ti#e$);

'la!el(&a#"$);title("lse -es"onse$);[. o#]=fre(!);

s!"lot(223);"lot(o#/(2*"i)*fs,20*log10(a!s(.)),$#$);

grid on;%la!el(&freenc'$);'la!el(ag$);title(&agnitde -es"onse$);

s!"lot(22);"lot(o#/(2*"i)*fs,nwra"(angle(.))*543,$!$);grid on;%la!el(&freenc'$);'la!el(&".ase$);title(&.ase -es"onse$);

7/23/2019 matlab example programs

7/15

%Design of FIR Low Pass Filter withFlattop Window

clear allclcfs=000;f"=00;

fn=2*f"/fs;n=30;win=window(@8atto"win, n+1);s!"lot(221);ste#(win,$r$);grid on;

%la!el(&ti#e$);

7/23/2019 matlab example programs

8/15

'la!el(&a#"$);title(&9latto" indow$);

!=rl(n,fn,$low"ass$,win);s!"lot(222);ste#(!,$$);grid on;%la!el(&ti#e$);'la!el(&a#"$);

title("lse -es"onse$);[. o#]=fre(!);

s!"lot(223);"lot(o#/(2*"i)*fs,20*log10(a!s(.)),$#$);grid on;%la!el(&freenc'$);'la!el(ag$);title(&agnitde -es"onse$);

s!"lot(22);"lot(o#/(2*"i)*fs,nwra"(angle(.))*543,$!$);grid on;

%la!el(&freenc'$);'la!el(&".ase$);title(&.ase -es"onse$);

7/23/2019 matlab example programs

9/15

%Correlation of two funtions

clcclear

%=[1 2 3 2 6 : ]'=[3 6 5 2 3 6 6]

%=%corr(%,')

7/23/2019 matlab example programs

10/15

s!"lot(211);"lot(%);grid on;

%la!el(&i#e(sec)$);'la!el(&

7/23/2019 matlab example programs

11/15

=con?();

s!"lot(311);"lot($);

%"eneration of Sine signals withdi#erent fre$uenies

clearclc

fre=10;

7/23/2019 matlab example programs

12/15

sa#"Cfre=100*fre;t=0D(1/sa#"Cfre)D1;%=sin(2*"i*fre*t);

s!"lot(311);"lot(t,%);grid on;%la!el(&i#e(sec)$);'la!el(&

7/23/2019 matlab example programs

13/15

'la!el(&

7/23/2019 matlab example programs

14/15

%"eneration of Random Signalclearclc

t=0D0401D10;ran=rand(1,lengt.(t));"lot(t,ran);grid on;%la!el(&i#e(sec)$);'la!el(&

7/23/2019 matlab example programs

15/15