Sahand University of Technology Electrical Engineering Department Microelectronic Research Center...

1

Sahand University of TechnologyElectrical Engineering DepartmentMicroelectronic Research Center

Simulink and code DSM D-T and C-TWith matlab

By:mostafa azadbakhtAdvisor:Dr.E.Najafi aghdam

2

Tow way for simulink DSM:

• Simulink block library1

• code2m.azadbakht

3

Totality algorithm for build discrete _ time DSM with sumulink block library:

H(Z) QUNTIZRESAMPLE AND HOLD

U V+

Y

1

m.azadbakht

4

Totality algorithm for build discrete _ time DSM with sumulink code:2

Step 3

Give FFT of output simulink and plot…

Step 2Simulink DSM with command schreier

Step 1Read the input & Read the transfusion NTF

m.azadbakht

5

STEP1:Read the NTF functionNTF=synthesizeNTF(order,osr,opt)

STEP 2:Read the gain feedback:FB=realizeNTF(NTF,’CIFB’)

STEP 3:Read the gain forward:FF=realizeNTF(NTF,’CIFF’)

All step for build discrete _ time Low pass DSM with simulink block library:

m.azadbakht

6

Parameters for all simulinks:Amplitude max vin=0.5 voltFin=0.0008*2*pi~0.005*piOSR=64Opt=1

constant:

m.azadbakht

7

Order 1:FB1=1

m.azadbakht

8

Command for draw spectrum:Plotsp(vo,vi,k);k=1.5~4

m.azadbakht

9

View analog in put and digital out put

Analog in

Digital out

m.azadbakht

10

Simulink DSM 1’s order Low pass with simulink code:

close all,clear all,clcosr=64;N=1;Nlev=2^N;n=2^13;z=57;t=[0:n-1];H=synthesizeNTF(1,osr,1);u=0.5*(Nlev-1)*sin(2*pi*z/n*t);v=simulateDSM(u,H,Nlev);spec=fft(v)/(n*(Nlev-1)/2);snr=calculateSNR(spec(1:ceil(n/(2*osr))+1),z);clear ff=linspace(0,0.5,n/3);figure,plot(f,dbv(spec(1:n/3)),'b'),grid on

m.azadbakht

11

Order 2:FB1=1 FB2=1

m.azadbakht

12

View spectrum :

m.azadbakht

13


Analog in

Digital out

m.azadbakht

14


close all,clear all,clcosr=64;N=1;Nlev=2^N;n=2^13;z=57;t=[0:n-1];H=synthesizeNTF(2,osr,1);u=0.5*(Nlev-1)*sin(2*pi*z/n*t);v=simulateDSM(u,H,Nlev);spec=fft(v)/(n*(Nlev-1)/2);snr=calculateSNR(spec(1:ceil(n/(2*osr))+1),z);clear ff=linspace(0,0.5,n/3);figure,plot(f,dbv(spec(1:n/3)),'b')

m.azadbakht

15

Order 3:FB1=0.44 FB2=0.2881 FB3=0.7997

m.azadbakht

16

View spectrum :

m.azadbakht

17


Analog in

Digital out

m.azadbakht

18



m.azadbakht

19

Order 4:FB1=0.2923 FB2=1.4212 FB3=2.7446 FB4=2.5536FF1=2.5536 FF2=2.7446 FF3=1.4212 FF4=0.2923

m.azadbakht

20

View spectrum :

m.azadbakht

21


Analog in

Digital out

m.azadbakht

22



m.azadbakht

23

Order 5:FB1=0.1086 FB2=0.7247 FB3=2.0551 FB4=3.1432 FB5=2.6416FF1=2.6416 FF2=3.1432 FF3=2.0551 FF4=0.7247 FF5=0.1086

m.azadbakht

24

View spectrum :

m.azadbakht

25


Analog in

Digital out

m.azadbakht

26



m.azadbakht

27

Order 6:FB1=0.0325 FB2=0.2855 FB3=1.1098 FB4=2.4712 FB5=3.3619 FB6=2.6850FF1=2.6850 FF2=3.3619 FF3=2.4712 FF4=1.1098 FF5=0.2855 FF6=0.0325

m.azadbakht

28

View spectrum :

m.azadbakht

29


Analog in

Digital out

m.azadbakht

30



m.azadbakht

31

Order 7:FB1=0.0082 FB2=0.0913 FB3=0.4664 FB4=1.4036 FB5=2.7423 FB6=3.4921 FB7=2.7096FF1=2.7093 FF2=3.4921 FF3=2.7423 FF4=1.4036 FF5=0.4664 FF6=0.0913 FF7=0.0082

m.azadbakht

32

View spectrum :

m.azadbakht

33


Analog in

Digital out

m.azadbakht

34



m.azadbakht

35

Simulink DSM Band pass for all order with block library :

(Z) (Z)Z -

m.azadbakht

CONVERT

36

Simulink DSM band pass 1’s order with block library :

m.azadbakht

37

View spectrum :

m.azadbakht

38


Analog in

Digital out

m.azadbakht

39

Simulink DSM 1’s order Band pass with analysis code:

close all;clear all;clcamp=0.452;n=2^15;t=[0:n];fin=0.24589746;u=amp*sin(2*pi*fin*t);y=zeros(1,n);v=y;for i=3:n; y(i)=-y(i-2)-u(i-2)+v(i-2); if y(i)>0 v(i)=1; else v(i)=-1; endendfigure(100),plotsp(u,v,2);figure(200),plot(v)

m.azadbakht

40

View spectrum :

m.azadbakht

41

Digital output:

m.azadbakht

42


m.azadbakht

43

View spectrum :

m.azadbakht

44


Analog in

Digital out

m.azadbakht

45


close all;clear all;clcamp=0.452;n=2^15;t=[0:n];fin=0.24985;u=amp*sin(2*pi*fin*t);y=zeros(1,n);v=y;for i=5:n; y(i)=-2*y(i-2)-y(i-4)-2*u(i-2)-u(i-4)+2*v(i-2)+v(i-4); if y(i)>0 v(i)=1; else v(i)=-1; endendfigure(100),plotsp(u,v,2);figure(200),plot(v)

m.azadbakht

46

View spectrum :

m.azadbakht

47

Digital output:

m.azadbakht

48


m.azadbakht

49

View spectrum :

m.azadbakht

50


Analog in

Digital out

m.azadbakht

51


close all;clear all;clcamp=0.452;n=2^15;t=[0:n];fin=0.24898789;u=amp*sin(2*pi*fin*t);y=zeros(1,n);v=y;for i=7:n; y(i)=-3*y(i-2)-3*y(i-4)-y(i-6)-0.8*u(i-2)-1.32*u(i-4)-0.56*u(i-6)+0.8*v(i-2)+1.32*v(i-4)+0.56*v(i-6); if y(i)>0 v(i)=1; else v(i)=-1; endendfigure(100),plotsp(u,v,2);figure(200),plot(v)

m.azadbakht

52

View spectrum :

m.azadbakht

53

Digital output:

m.azadbakht

54


m.azadbakht

55

View spectrum :

m.azadbakht

56


Analog in

Digital out

m.azadbakht

57


close all;clear all;clcamp=0.452;n=2^15;t=[0:n];fin=0.24898789;u=amp*sin(2*pi*fin*t);y=zeros(1,n);v=y;for i=7:n; y(i)=-3*y(i-2)-3*y(i-4)-y(i-6)-0.8*u(i-2)-1.32*u(i-4)-0.56*u(i-6)+0.8*v(i-2)+1.32*v(i-4)+0.56*v(i-6); if y(i)>0 v(i)=1; else v(i)=-1; endendfigure(100),plotsp(u,v,2);figure(200),plot(v)

m.azadbakht

58

View spectrum :

m.azadbakht

59

Digital output:

m.azadbakht

60


m.azadbakht

61

View spectrum :

m.azadbakht

62


Analog in

Digital out

m.azadbakht

63


close all;clear all;clcn=2^15;t=[0:n];fin=0.25;amp=0.455;u=amp*sin(2*pi*fin*t);y=zeros(1,n);v=y;for i=11:n; y(i)=-4.998*y(i-2)-9.996*y(i-4)-9.998*y(i-6)-4.99*y(i-8)-y(i-10)-0.80769*u(i-2)-2.9141*u(i-4)-3.97*u(i-6)-2.4186*u(i-8)-0.555*u(i-10)+0.80769*v(i-2)+2.9141*v(i-4)+3.97*v(i-6)+2.4186*v(i-8)+0.555*v(i-10); if y(i)>0 v(i)=1; else v(i)=-1; endendfigure(100),plotsp(u,v,2);figure(200),plot(v)

m.azadbakht

64

View spectrum :

m.azadbakht

65

Digital output:

m.azadbakht

66

Totality algorithm for build continuous _ time DSM with sumulink block library:1

H(Z) QUNTIZREU V+

Y

SAMPLE AND HOLD

m.azadbakht

67

Order 1:

m.azadbakht

68

View spectrum :

m.azadbakht

69


Analog in

Digital out

m.azadbakht

70

Order 2:FB1=1 FB2=1.5

m.azadbakht

71

View spectrum :

m.azadbakht

72


Analog in

Digital out

m.azadbakht

73

Order 3:FB1=0.2316 FB2=0.7868 FB3=2.4154

Fg=1/650

m.azadbakht

74

View spectrum :

m.azadbakht

75


Analog in

Digital out

m.azadbakht

76

Order 4:FB1=0.0889 FB2=0.1379 FB3=.2039 FB4=0.3184

Fg=0.0168

m.azadbakht

77

View spectrum :

m.azadbakht

78


Analog in

Digital out

m.azadbakht

79

Calculate SNRmax

• Analytical code just for 1;s order and 2’s order1

• Simulink code for all order’s2

m.azadbakht

80

close allclear allclcSNRmax=zeros(1,256);x=100;for N=1:4; %degree quantizer for osr=4:4:1024; SNRmax(osr)=6.02*N+1.76-5.17+30*log10(osr); end figure(x);plot(SNRmax); x=x+100;end

Analytical code 1’s order:

SNRmax=6.02N+1.76db-5.17db+30log(osr)

m.azadbakht

81

N=1Figure 100:

SNRmax=92.92db

m.azadbakht

82

N=2Figure 200:

SNRmax=98.94db

m.azadbakht

83

N=3Figure 300:

SNRmax=105db

m.azadbakht

84

N=4Figure 400:

SNRmax=111db

m.azadbakht

85

Analytical code 2’s order:

SNRmax=6.02N+1.76db-12.9db+50log(osr)

close allclear allclcx=100;SNRmax=zeros(1,256);for N=1:4; for osr=4:4:1024; SNRmax(osr)=6.02*N+1.76-12.9+50*log10(osr); end figure(x);plot(SNRmax); x=x+100;end

m.azadbakht

86

N=1Figure 100:

SNRmax=145.4db

m.azadbakht

87

N=2Figure 200:

SNRmax=151.4db

m.azadbakht

88

N=3Figure 300:

SNRmax=157.4db

m.azadbakht

89

N=4Figure 400:

SNRmax=163.5db

m.azadbakht

90

Simulink code for all order

m.azadbakht

91

close all,clear all,clcformat longn=2^18;z=57;t=[0:n-1];u=0.452*sin(2*pi*z/n*t);SNRmax=zeros(1,256);x=100;for order=1:4;for N=1:4; NLEV=2^N;for osr=4:4:1024; h=synthesizeNTF(order,osr,1); v=simulateDSM(u,h,3); spec=fft(v)/(n*(NLEV-1)/2); SNRmax(osr)=calculateSNR(spec(1:ceil(n/(2*osr))+1),z); end figure(x);plot(SNRmax); x=x+100;endend

m.azadbakht

92

THANK’S

m.azadbakht

Date post:	17-Dec-2015
Category:	Documents
Upload:	dana-lucas
View:	214 times
Download:	1 times

Sahand University of Technology Electrical Engineering Department Microelectronic Research Center...

Documents