ss_mlsrs.m

来自「matlab仿真程序：扩频发射接收机用匹配滤波器的方法同步」· M 代码 · 共 18 行

function [seq]=ss_mlsrs(connections);
% [seq]=ss_mlsrs(connections)
%               SS_MLSRS  generates the maximal length shift register sequence when the
%               shift register connections are given as input to the function. A "zero"
%               means not connected, whereas a "one" represents a connection. 
m=length(connections);          
L=2^m-1;                                % length of the shift register sequence requested
registers=[zeros(1,m-1) 1];             % initial register contents
seq(1)=registers(m);                    % first element of the sequence
for i=2:L,
   new_reg_cont(1)=connections(1)*seq(i-1);
   for j=2:m,
     new_reg_cont(j)=registers(j-1)+connections(j)*seq(i-1);
   end;
   registers=new_reg_cont;              % current register contents
   seq(i)=registers(m);                 % the next element of the sequence
end;