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# SS Lab Class No 6 Sourav_CSE  Oct 23rd, 2019 82 Never
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1. %{
2. SS_lab_06
3. Rahat Sir
4. Date: 23-10-2019
5. %}
6. % Convolution_4
7. % x(t) = (t-1) (u(t-1)-u(t-3)
8. tx = 1:.01:3;
9. x = tx - 1;
10. % h(t) = u(t+1) - 2u(t-2)
11. th1 = -1:.01:2;
12. th2 = 2:.01:10;
13.
14. th = [th1 th2];
15.
16. h = [ones(size(th1)) -1.*ones(size(th2))];
17. % convolution integral
18. y = conv(x,h);
19.
20. %% Convolution_5
21. % interconnection of system
23.
24. %first System
25. th1 = 0:.01:3;
26. th2 = 0:.01:3;
27. th22 = 3:.01:6;
28.
29. h1 = th1 .* exp(-3*th1);
30.
31. tx = 0:.01:3;
32.
33. x = ones(size(tx));
34. w = conv(x,h1).* .01; % 0 to 6
35. tw = linspace(min(tx)+min(th1),max(tx)+max(th1), length(w));
36. h2 =[th2.*cos(pi * th2) zeros(size(th22))];
37.
38. y = conv(w,h2).*.01;
39. ty = linspace(min(th2)+min(tw),max(th2)+max(tw), length(y));
40. figure
41. plot(ty,y);
42.
43. % Second System
44. h2 = th2.* cos(pi * th2);
45. w2 = conv(h1,h2).* .01;
46. tw = linspace(min(th2)+min(th1),max(th2)+max(th1), length(w2));
47. x2 = [x zeros(size(th22))];
48. tx2 = [tx th22];
49. y2 = conv(x2,w2).*.01;
50. ty2 = linspace(min(tx2)+min(tw),max(tx2)+max(tw),length(y2));
51. figure
52. plot(ty2,y2);
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