For sequences of length
, the cyclic autocorrelation operator is defined by
![]() |
(7.19) |
By using zero padding by a factor of 2 or more, cyclic autocorrelation also implements acyclic autocorrelation as defined in (6.16).
An unbiased cyclic autocorrelation is obtained, in the
zero-mean case, by simply normalizing
by the number
of terms in the sum:
![]() |
(7.20) |