怎么实现差分编码?

solpoiuy

各位达人,小弟初学MATLAB,最近碰到问题
不知道怎么用MATLAB实现差分编码.
比如:
m=randint(20,1,2)
m =
     1
     0
     1
     0
     1
     1
     0
     0
     1
     0
要得到
m=
    1
    1
    0
    0
    1
    0
    0
    0
    1
    1
也就是当前位与下一位异或得到当前位,该怎么编码?

simon21

1. clear all;
   
2. sym=[0 0; 0 1; 1 0 ;1 1]
   
3. I0=input('Please input the I1? ')%差分编码%
   
4. Q0=input('Please input the Q1? ')
   
5. I=[];
   
6. Q=[];
   
7. [m,n]=size(sym);
   
8. for add=1:m   
   
9.     A=sym(add,1);B=sym(add,2);
   
10.     if add==1
    
11.        IK(add)=((~(xor(A,B))))&(xor(A,I0))|(xor(A,B))&(xor(A,Q0));
    
12.        QK(add)=((~(xor(A,B))))&(xor(B,Q0))|(xor(A,B))&(xor(B,I0));
    
13.        sym(add,1)=IK(add)  ;
    
14.        sym(add,2)=QK(add);
    
15.     else
    
16.     IK(add)=((~(xor(A,B))))&(xor(A,IK(add-1)))|(xor(A,B))&(xor(A,QK(add-1)));
    
17.     QK(add)=((~(xor(A,B))))&(xor(B,QK(add-1)))|(xor(A,B))&(xor(B,IK(add-1)));
    
18.     sym(add,1)=IK(add) ;
    
19.     sym(add,2)=QK(add);
    
20.     end
    
21. end
    
22. sym
    
23. I=[];
    
24. Q=[];
    
25. for add=1:m    %差分解码%
    
26.   I(add)=sym(add,1);Q(add)=sym(add,2);
    
27.   if add==1
    
28.      A1=(~Q(add)&~I0&Q0)|(I0&Q0&~I(add))|(I0&~Q0&Q(add))|(~I0&~Q0&I(add));
    
29.      B1=(I(add)&~I0&Q0)|(I0&Q0&~Q(add))|(I0&~Q0&~I(add))|(~I0&~Q0&Q(add));
    
30.     sym(add,1)=A1;sym(add,2)=B1;
    
31.   else
    
32.       AK=(~Q(add)&~I(add-1)&Q(add-1))|(I(add-1)&Q(add-1)&~I(add))|(I(add-1)&~Q(add-1)&Q(add))|(~I(add-1)&~Q(add-1)&I(add));
    
33.      BK=(I(add)&~I(add-1)&Q(add-1))|(I(add-1)&Q(add-1)&~Q(add))|(I(add-1)&~Q(add-1)&~I(add))|(~I(add-1)&~Q(add-1)&Q(add));
    
34.     sym(add,1)=AK;sym(add,2)=BK;
    
35.     end
    
36. end
    
37. sym

复制代码

是不是这个东西？