jens
b31f3e7435
git-svn-id: http://moon:8086/svn/matlab/trunk@153 801c6759-fa7c-4059-a304-17956f83a07c
32 lines
1.7 KiB
Matlab
Executable File
32 lines
1.7 KiB
Matlab
Executable File
% ##################################################################################
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% ## Loesung: DFT: Abbruchfehler, Unterabtastung ##
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% ##################################################################################
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kk08 = 0:7;
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kk64 = 0:63;
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x1_08 = sin(kk08*pi/8); x1_64 = sin(kk64*pi/8);
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x2_08 = sin(kk08*pi/2); x2_64 = sin(kk64*pi/2);
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x3_08 = sin(kk08*pi*3/2); x3_64 = sin(kk64*pi*3/2);
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figure; kk100=0:8/100:8; plot(kk100,sin(kk100*pi/8),':'); hold on;
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stem(kk08,x1_08); axis([0 8 -1.2 1.2]); title('x1(k)=sin(k*pi/8), k=0...7');
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figure;stem(kk08,abs(fft(x1_08))); axis([0 7 -1 6]); title('abs(X1(n)),n=0...7');
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figure;stem(kk64,x1_64);axis([0 64 -1.2 1.2]);title('x1(k)=sin(k*pi/8),k=0...63');
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figure;stem(kk64,abs(fft(x1_64)));axis([0 64 -1 40]);title('abs(X1(n)),n=0...63');
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input('....Zum Fortfahren: RETURN druecken');
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figure; kk100=0:8/100:8; plot(kk100,sin(kk100*pi/2),':'); hold on;
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stem(kk08,x2_08); axis([0 8 -1.2 1.2]); title('x2(k)=sin(k*pi/2), k=0...7');
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figure;stem(kk08,abs(fft(x2_08))); axis([0 7 -1 6]); title('abs(X2(n)),n=0...7');
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figure;stem(kk64,x2_64);axis([0 64 -1.2 1.2]);title('x2(k)=sin(k*pi/2),k=0...63');
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figure;stem(kk64,abs(fft(x2_64)));axis([0 64 -1 40]);title('abs(X2(n))),n=0...63');
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input('....Zum Fortfahren: RETURN druecken');
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figure; kk100=0:8/100:8; plot(kk100,sin(kk100*pi*3/2),':'); hold on;
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stem(kk08,x3_08); axis([0 8 -1.2 1.2]); title('x3(k)=sin(k*pi*3/2), k=0...7');
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figure;stem(kk08,abs(fft(x3_08))); axis([0 8 -1 6]); title('abs(X3(n)), n=0...7');
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axis([0 7 -1 6]);
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figure;stem(kk64,x3_64);axis([0 64 -1.2 1.2]);title('x3(k)=sin(k*pi*3/2),k=0...63');
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figure;stem(kk64,abs(fft(x3_64)));axis([0 64 -1 40]);title('abs(X3(n)),n=0...63');
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% ##### EOF #####
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