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.