Filters an input sequence using a specific interpolated FIR (IFIR) filter.
Programming Patterns
You can use the
FIR Narrowband Filter Design
node to generate the
IFIR Filter
for this node.
signal
Input signal.
This input accepts the following data types:

1D array of doubleprecision, floatingpoint numbers

1D array of complex doubleprecision, floatingpoint numbers

Waveform

Waveform in complex doubleprecision, floatingpoint numbers

1D array of waveforms

1D array of waveforms in complex doubleprecision, floatingpoint numbers
IFIR filter
The IFIR filter.
filter type
Passband of the filter.
Name 
Description 
Lowpass 
Uses a lowpass filter.

Highpass 
Uses a highpass filter.

Bandpass 
Uses a bandpass filter.

Bandstop 
Uses a bandstop filter.

Default:
Lowpass
interpolation
Interpolation factor.
The model filter is stretched by
interpolation
times.
model filter
Coefficients of the model filter.
image suppressor
Coefficients of the filter image suppressor.
error in
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Many nodes provide an
error in
input and an
error out
output so that the node can respond to and communicate errors that occur while code is running. The value of
error in
specifies whether an error occurred before the node runs. Most nodes respond to values of
error in
in a standard, predictable way.
error in
does not contain an error

error in
contains an error



If no error occurred before the node runs, the node begins execution normally.
If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as
error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the
error in
value as
error out.

Default:
No error
filtered signal
Filtered signal.
This output can return the following data types:

1D array of doubleprecision, floatingpoint numbers

1D array of complex doubleprecision, floatingpoint numbers

Waveform

Waveform in complex doubleprecision, floatingpoint numbers

1D array of waveforms

1D array of waveforms in complex doubleprecision, floatingpoint numbers
error out
Error information.
The node produces this output according to standard error behavior.
Many nodes provide an
error in
input and an
error out
output so that the node can respond to and communicate errors that occur while code is running. The value of
error in
specifies whether an error occurred before the node runs. Most nodes respond to values of
error in
in a standard, predictable way.
error in
does not contain an error

error in
contains an error



If no error occurred before the node runs, the node begins execution normally.
If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as
error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the
error in
value as
error out.

Algorithm for Calculating the Delay for the Filter
The overall filter is a linearphase FIR filter. This node calculates the delay for the filter using the following equation:
$\mathrm{delay}=\frac{\left[({N}_{G}1)M+{N}_{I}\right]}{2}$
where

N
_{
G
}
is the number of elements in
Model Filter

N
_{
I
}
is the number of elements in
Image Suppressor

M
is the value of
interpolation
Where This Node Can Run:
Desktop OS: Windows
FPGA:
Not supported
Web Server: Not supported in VIs that run in a web application