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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /830/CH4/EX4.1.2 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '830/CH4/EX4.1.2')
| -rwxr-xr-x | 830/CH4/EX4.1.2/CTFT_1.sce | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/830/CH4/EX4.1.2/CTFT_1.sce b/830/CH4/EX4.1.2/CTFT_1.sce new file mode 100755 index 000000000..80f039a90 --- /dev/null +++ b/830/CH4/EX4.1.2/CTFT_1.sce @@ -0,0 +1,41 @@ +//Graphical//
+//Example 4.1.2 Continuous Time Fourier Transform
+//and Energy Density Function of a Square Waveform
+// x(t)= A, from -T/2 to T/2
+clear;
+clc;
+close;
+// Analog Signal
+A =1; //Amplitude
+Dt = 0.005;
+T = 4; //Time in seconds
+t = -T/2:Dt:T/2;
+for i = 1:length(t)
+ xa(i) = A;
+end
+//
+// Continuous-time Fourier Transform
+Wmax = 2*%pi*2; //Analog Frequency = 2Hz
+K = 4; k = 0:(K/800):K;
+W = k*Wmax/K;
+disp(size(xa))
+Xa=xa'*exp(-sqrt(-1)*t'*W)*Dt;
+Xa = real(Xa);
+W = [-mtlb_fliplr(W), W(2:501)]; // Omega from -Wmax to Wmax
+Xa = [mtlb_fliplr(Xa), Xa(2:501)];
+ESD = Xa^2; //Energy Density Spectrum
+subplot(3,1,1);
+plot(t,xa);
+xlabel('t in msec.');
+ylabel('xa(t)')
+title('Analog Signal')
+subplot(3,1,2);
+plot(W/(2*%pi),Xa);
+xlabel('Frequency in Hz');
+ylabel('Xa(jW)')
+title('Continuous-time Fourier Transform')
+subplot(3,1,3);
+plot(W/(2*%pi),ESD);
+xlabel('Frequency in Hz');
+ylabel('SXX')
+title('Energy Density Spectrum')
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