?? linearfeedbackshiftregister.m
字號:
%File LinearFeedbackShiftRegister.m
function[y,outstate]=LinearFeedbackShiftRegister(R,generator,instate,N)
if max(generator)>R
error(['The degree of the generator polynomial,',...
int2str(max(generator)),',cannot exceed R,',int2str(R),'.']);
end
if length(instate)>R
error(['The length of the input state vector,',...
int2str(length(instate)),',cannot exceed R,',int2str(R),'.']);
end
a=sort(generator);
P=length(generator);
M=length(instate)+1;
for k=1:N
fee=instate((generator(2)));
for q=3:P
fee=bitxor(fee,instate(generator(q)));
end
instate=[fee,instate];
y(k)=instate(1);
instate(M)=[];
end
outstate=instate;
%End of function file
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