National Instruments Car Stereo System 320571-01 사용자 설명서
NI-DSP Analysis VI Reference
Chapter 2
Part 3: NI-DSP Function Reference 2-7 NI-DSP SRM for LabVIEW for Windows
DSP Blackman Window
Applies a Blackman window to the input
sequence X. If Y represents the output
sequence Blackman{X}, the elements of Y
are obtained from the following formula:
sequence X. If Y represents the output
sequence Blackman{X}, the elements of Y
are obtained from the following formula:
y
i
= x
i
[0.42 - 0.50 cos(w)
+ 0.08 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 {X}.
Blackman {X} is a DSP Handle Cluster that is identical to X, but with the results of Blackman {X}
already stored in the memory buffer on the DSP board.
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.