From f35ea80659b6a49d1bb2ce1d7d002583f3f40947 Mon Sep 17 00:00:00 2001 From: prashantsinalkar Date: Tue, 10 Oct 2017 12:38:01 +0530 Subject: updated the code --- 40/CH10/EX10.5a/Exa_10_5a.sce | 62 +++++++++++++++++++++---------------------- 1 file changed, 31 insertions(+), 31 deletions(-) (limited to '40/CH10/EX10.5a') diff --git a/40/CH10/EX10.5a/Exa_10_5a.sce b/40/CH10/EX10.5a/Exa_10_5a.sce index 42d0cbf29..9f1e98c69 100755 --- a/40/CH10/EX10.5a/Exa_10_5a.sce +++ b/40/CH10/EX10.5a/Exa_10_5a.sce @@ -1,32 +1,32 @@ -//Fir low pass filter design by frequency sampling -z=%z; -N=10; -magHk=[1 1 1 0 0 0 0 0 1 1]; -k=[0:7 -1 -2]; -fik=-%pi*k'*(N-1)/N; -for i=1:length(fik) - H1k(i)=magHk(i)*exp(%i*fik(i)); -end -H1n=(dft(H1k,1)); -H2k=H1k; -H2k(3)=0.5*%e^(-%i*1.8*%pi); -H2k(9)=0.5*%e^(%i*1.8*%pi); -H2n=(dft(H2k,1)); -H1Z=0;H2Z=0; -for i=1:length(H1n) - H1Z=H1Z+H1n(i)*z^(-i); -end -for i=1:length(H2n) - H2Z=H2Z+H2n(i)*z^(-i); -end -F=0:0.01:1; -F1=0:0.1:0.9; -H1F=abs(horner(H1Z,exp(%i*2*%pi*F'))); -H2F=abs(horner(H2Z,exp(%i*2*%pi*F'))); -a=gca(); -plot2d(F1,magHk); -plot2d(F,H2F); -plot2d(F,H1F); -xlabel('Digital Frequency F'); -ylabel('magnitude'); +//For low pass filter design by frequency sampling +z=%z; +N=10; +magHk=[1 1 1 0 0 0 0 0 1 1]; +k=[0:7 -1 -2]; +fik=-%pi*k'*(N-1)/N; +for i=1:length(fik) + H1k(i)=magHk(i)*exp(%i*fik(i)); +end +H1n=(fft(H1k,1)); +H2k=H1k; +H2k(3)=0.5*%e^(-%i*1.8*%pi); +H2k(9)=0.5*%e^(%i*1.8*%pi); +H2n=(fft(H2k,1)); +H1Z=0;H2Z=0; +for i=1:length(H1n) + H1Z=H1Z+H1n(i)*z^(-i); +end +for i=1:length(H2n) + H2Z=H2Z+H2n(i)*z^(-i); +end +F=0:0.01:1; +F1=0:0.1:0.9; +H1F=abs(horner(H1Z,exp(%i*2*%pi*F'))); +H2F=abs(horner(H2Z,exp(%i*2*%pi*F'))); +a=gca(); +plot2d(F1,magHk); +plot2d(F,H2F); +plot2d(F,H1F); +xlabel('Digital Frequency F'); +ylabel('magnitude'); xtitle('Low pass filter using frequency sampling'); \ No newline at end of file -- cgit