ihdb3.m

通信原理中所介绍到的有关AMI,HDB3编码的matlab程序

function [out]=IHDB3(d)
numofzero=0;
D2_b=input('please input D2_b:   ');
while abs(D2_b)~=1
      D2_b=input('please reinput D2_b( error ,D2_b shuld be "1 or -1" !!!):   ');
end
for i=1:length(d)
    if d(i)~=0
        if d(i)==D2_b;
            ihdb3(i)=0;
            if numofzero==2
                 ihdb3(i-3)=0;
            end
        else
         D2_b=d(i);
         numofzero=0;
         ihdb3(i)=1;
        end
    else 
        ihdb3(i)=d(i);
    end            
end  
out=ihdb3;