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# Untitled

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1. % clear;
2. % close all
3. % f0 = 1800;
4. % U = 1200;
5. % T = 1/U;
6. % T1 = 1/f0;
7. % q = 4;
8. % shag = 5;
9. % f = -11000:shag:11000;
10. % spec_sig = zeros(q, length(f));
11. % i0 = [0, 0, 1, 1];
12. % i1 = [0, 1, 0, 1];
13. % Am = 1;
14. % %Амплитудные спектры
15. %
16. % for i = 1:q
17. % s_i1 = Am*(1-(2*i0(i)/(sqrt(q)-1)));
18. % s_i2 = Am*(1-(2*i1(i)/(sqrt(q)-1)));
19. % spec_sig(i,:) = s_i1*sqrt(T1/2)*(sinc((f-f0)*T1) + sinc((f+f0)*T1)).*exp(1j*pi*f*T1) + s_i2/1j*sqrt(T1/2)*(sinc((f-f0)*T1) - sinc((f+f0)*T1)).*exp(1j*pi*f*T1);
20. % subplot(2,2, i), plot(f(length(f)/2:length(f)), abs(spec_sig(i, length(f)/2:length(f)))), xlabel('f'), ylabel('spec-sig_i(f)');
21. % grid on;
22. % %disp(i);
23. % %disp(abs(S(i)));
24. % end
25.
26. clear;
27. close all
28. l = 45;
29. T0 = 2;
30. f0 = l/T0;
31. t = 0:1/1000*T0:T0;
32. f1 = (2/T0)^(1/2)*cos(2*pi*f0*t);
33. f2 = (2/T0)^(1/2)*sin(2*pi*f0*t);
34.
35. F1 = 1800;
36. T = 2/F1;
37. TIME = 0:T/1000:T;
38.
39. sig1 = (2/T)^(1/2)*cos(2*pi*F1*TIME)+(2/T)^(1/2)*sin(2*pi*F1*TIME);
40. plot(t, f1, t, f2);
41. figure(2);
42. plot(TIME,sig1);
43. % доказательство пункт 2
44. f11 = sqrt(sum(f1.*f1));
45. f22 = sqrt(sum(f2.*f2));
46. f1 = f1./f11;
47. f2 = f2./f22;
48. scal1 = (sum(f1.*f1));
49. disp(scal1);
50. scal2 = (sum(f1.*f2));
51. disp(scal2);
52. scal3 = (sum(f2.*f2));
53. disp(scal3);
54. %часть 2
55. q = 4;
56. i0 = [0, 0, 1, 1];
57. i1 = [0, 1, 0, 1];
58. Am = 1;
59. s_x = zeros(0,q);
60. s_y = zeros(0,q);
61. for i = 1:q
62. s_x(i) = Am*(1-(2*i0(i)/(sqrt(q)-1)));
63. s_y(i) = Am*(1-(2*i1(i)/(sqrt(q)-1)));
64. end
65. figure(3);
66. for i=1:q
67.     plot(s_x(i), s_y(i),'o','Color', 'k');
68.     hold on;
69. end
70. axis([-2 2,-2,2]);
71. grid on;
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