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Chapter 2 NI-DSP Analysis VI Reference
NI-DSP SRM for LabVIEW for Windows 2-8 Part 3: NI-DSP Function Reference
DSP Blackman Harris Window
Applies a Blackman Harris window to
the input sequence X. If Y represents
the output sequence Blackman
Harris{X}, the elements of Y are
obtained using the following formula:
the input sequence X. If Y represents
the output sequence Blackman
Harris{X}, the elements of Y are
obtained using the following formula:
y
i
= x
i
[0.42323 - 0.49755 cos(w)
+0.07922 cos(2w)]
for i = 0, 1, 2, … , n-1
w =
2
π
i
n
,
where n is the number of elements in X.
X is a DSP Handle Cluster that indicates the memory buffer on the DSP board that contains the input
signal array.
signal array.
Note: The operation is performed in place and the input array X is overwritten by the output
Blackman Harris {X}.
Blackman Harris {X} is a DSP Handle Cluster that is identical to X, but with the results of Blackman
Harris {X} already stored in the memory buffer on the DSP board.
Harris {X} already stored in the memory buffer on the DSP board.
error in (no error) contains the error information from a previous VI. If an error occurs, it is passed out
error out and no other calls are made.
error out and no other calls are made.
error out contains the error information for this call.