Constructs a Galois LFSR from its feedback polynomial $f(x)$.

Parameters:¶

feedback_poly: Poly¶

The feedback polynomial $f(x)=-c_0{x}^n-c_1{x}^{n-1}-\cdots -c_{n-2}{x}^2-c_{n-1}x+1$.

state: ArrayLike | None = None¶

The initial state vector $S=[S_0,S_1,\dots ,S_{n-2},S_{n-1}]$. The default is None which corresponds to all ones.

Notes

A Galois LFSR may be constructed from its characteristic polynomial $c(x)$ by passing in its reciprocal as the feedback polynomial. This is because $f(x)=x^{n}c(x^{-1})$.