1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
// Exa D.1
// Using the shift register shown in Figure D.3, generate an m-sequence and demonstrate its properties.
clc;
clear all;
//solution
//Referring Fig D.3
x=[0 0 1]; //Initial stage
output=x(3);
disp(" First m-sequence using 3-stage shift register.");
disp(" x1 x2 x3 output");
printf(' Initial %d %d %d %d \n ',x(1),x(2),x(3),output);
for i= 1:7
printf('Shift %d',i);
x(3)=x(2);
if(x(3)==1) //TO get values in range of [-1 1] for plot
dummy(i)=-1
else
dummy(i)=1;
end
x(2)=x(1);
if(output== 1& x(3)==1) //As new x(1)=prev stage x(3) ored prev stage x(2)
x(1)=0;
else
if(output== 0& x(3)==0)
x(1)=0;
else
x(1)=1;
end
end
printf(' %d %d %d ',x(1),x(2),x(3));
output=x(3);
printf(' %d',output);
printf('\n ');
end
bar(dummy,0.2,'green');
xlabel("Time","FontSize",5);
title("7-chip first m-sequence for one T period","FontSize",5);
disp("The properties of m-sequence in Figure(0)are -");
disp("Number of -1s = 4 , Number of 1s = 3 ");
disp("Run length 1 = 2 , Run length 2 = 1");
disp("Run length = 1");
|
