Download Signal Processing Toolset Reference Manual

Chapter 12
WFBD Toolkit Function Reference
Decimation Filter VI
This VI performs a decimation filter.
decimate factor indicates the data reduction rate in the y[i] array. Only
every Mth point of the output from filter G is kept in the y[i] array.
initial condition contains the initial condition of the x[i].
x[i] contains the input signal.
final condition contains the final condition of the x[i].
h[n] contains the filter coefficients.
y[i] contains the output array.
error. Refer to Chapter 14, Wavelet Error Codes, for a description of the
error.
This VI performs the following operation:
X
G(z)
M
Y
That is
ng
yi =
∑ x1
Mi + k g n g – k
i = 0, 1…ceil ( ( L – n g + 1 ) ⁄ M )
k=1
Signal Processing Toolset
12-10
© National Instruments Corporation