scrambler.asv

OFDM的PHY发射端matlab实现程序

%function [dataout,P127seq]=scrambler(datain)
% datain:  input data sequence
% datamid :a middle variance which keep the
% X(7) xor X(4)
% dataout1:keep the output
% dataout: outout data sequence
datamid=0;
dataout=[];
dataout1=[];
%dataout2=zeros(1,127);
%P127seq=[];
S=[ones(1,7)];
for j=1:127
    %length(datain)
   %if  datain(j)==datamid
    %   dataout1(j)=0;
    %else dataout1(j)=1;
    %end
    data
   for i=1:6                      %循环移位
     S(8-i)=S(7-i);  
   end
   S(1)=datamid;
   if S(4)==S(7);                 %逻辑异或
   datamid=0;
   else datamid=1;
   end
end
dataout=dataout1;
%-------------------------------------------------------
  % Generate the P0-126 sequence
%------------------------------------------------------- 
S1=[ones(1,7)];
datamid2=0;
for i=1:127
    dataout2(i)==datamid2;
    for i=1:6                      %循环移位
      S1(8-i)=S1(7-i);  
    end
    S1(1)=datamid2;
    if S1(4)==S1(7);                 %逻辑异或
    datamid2=0;
    else datamid2=1;
    end
end
P127seq=dataout2;