National Instruments 320571-01 Car Stereo System User Manual


 
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:
y
i
= x
i
[0.42 - 0.50 cos(w)
+ 0.08 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
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.
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.