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NI-DSP Analysis VI Reference Chapter 2
Part 3: NI-DSP Function Reference 2-30 NI-DSP SRM for LabVIEW for Windows
DSP Exact Blackman Window
Applies an Exact Blackman window to
the input sequence X. If Y represents
the output sequence Exact
Blackman{X}, the elements of Y are
obtained using the formula:
y
i
= x
i
[0.42659071
- 0.49656062 cos(w)
+ 0.07684867 cos(2w)]
for i = 0, 1, 2, … , n-1
w =
2πi
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.
Note: The operation is performed in place and the input array X is overwritten by the output Exact
Blackman {X}.
Exact Blackman {X} is a DSP Handle Cluster that is identical to X, but with the results of Exact
Blackman {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 contains the error information for this call.