Creates an additive scrambler.

Parameters:¶

feedback_poly: PolyLike¶

The feedback polynomial \(f(x) = -c_{0} \cdot x^{n} - c_{1} \cdot x^{n-1} - \dots - c_{n-2} \cdot x^{2} - c_{n-1} \cdot x + 1\).

Note

The feedback polynomial \(f(x) = x^n \cdot c(x^{-1})\) is the reciprocal of the characteristic polynomial \(c(x)\). The reciprocal can be found using galois.Poly.reverse.

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.