Given a digital system, can the value of any sample be predicted by taking a linear combination of the previous samples?
Stated mathematically, can a set of coefficients, , be determined such that
That is, can a signal be represented as coefficients of an all-pole (only feedback terms) IIR filter.
If yes, then the coefficients and the first samples would completely determine the remainder of the signal, because the rest of the samples can be calculated by the above equation.