National Instruments 320571-01 User Manual
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:
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 =
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 Exact
Blackman {X}.
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.
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 and no other calls are made.
error out contains the error information for this call.