Computes the inverse Chirp-Z transform of a sequence.
The complex valued input sequence.
The length of chirp-z{x} must be greater than or equal to number of samples.
Length of the sequence after the inverse Chirp-Z transform.
number of samples must be less than or equal to the length of chirp-z{x}. If number of samples is less than or equal to 0, the node sets number of samples to the length of chirp-z{x}.
Default: -1
The point at which this node begins evaluating the Chirp-Z transform.
If starting point is 0, the node returns an error.
Default: 1 + 0i
The increment between each point to evaluate for the Chirp-Z transform.
increment cannot be 0.
Avoiding Singular Cases of the Inverse Chirp-Z Transform
To avoid singular cases of the inverse Chirp-Z transform, increment must be different from where and N is number of samples.
Default: 1 + 0.1i
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
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.
Default: No error
The inverse Chirp-Z transform of the complex valued input sequence.
Error information.
The node produces this output according to standard error behavior.
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.
If Y represents the input sequence chirp-z{x}, the following equation shows how this node performs the Chirp-Z transform to obtain the output sequence x:
for k=0, 1, ..., M-1
where
This node employs a convolution-based method to implement the inverse Chirp-Z transform according to the following equations.
with
where
m _{ n } can be obtained from its z-transform M(z):
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application