I am reading a paper and say this
"The idea is to load $f(X)$ into LFSR to multiply by $X$ mod $g(X)$(primitive polynomial deg $g=n$). We next compute a polynomial h(X) whose coefficients are given by successive values of a particular cell of register".
and say "$h(Y)=\sum_{i=0}^{n-1}{a_iY^i}$, where $a_i$ is a coefficient of $X^{n-1}$ in $X^if(X)$ mod $g(X)$"
My question, Please help me How design this LFSR? and The paper too say :
$f(X)=(\sum_{i=0}^{n}{a_iX^{-(i+1)}}+\sum_{i=n}^{\infty}{b_iX^{-(i+1)}})g(X)$,
Why this last expression?