Group delay estimation of a signal.
[GD,FNORM]=sgrpdlay(X) [GD,FNORM]=sgrpdlay(X,FNORM)
signal in the time-domain.
normalized frequency. By default, FNORM is a linearly spaced vector between -0.5 and 0.5 with length(X) elements.
computed group delay. When GD equals zero, it means that the estimation of the group delay for this frequency was outside the interval [1 xrow], and therefore meaningless.
sgrpdlay estimates the group delay ofsignal X at the normalized frequency(ies) FNORM.