why is it showing "modulator output is having a non-discrete sampling time"?

When the output from an analog to digital converter is fed to a CIC filter , it shows that the signal at the output port of the decimator is a variable-size signal with non-discrete sample time. The sample time for any variable size signal must be discrete.

Answer 1

[Samhitha]

Hi @ABHIRAMI,

Ensure the decimation factor is correctly configured in CIC filter setup. The decimation factor should be an integer, as it dictates how much the input sample rate is reduced. This factor has a direct impact on the sample time of the output signal. If the decimation factor is not an integer, it can cause inconsistencies in the output sample time, potentially leading to a variable-size signal. By ensuring that the decimation factor is correctly set, you can maintain a consistent and discrete sample time.

For more details, look into the following documentation:

https://www.mathworks.com/help/dsphdl/ref/cicdecimator.html