How can I get the coefficients using the fir filter and hamming window in y = decimate(x,r,"fir") , so I can simulate this function output in another program?

In using this function in matlab y = decimate(x,r,"fir"), I have got an output that I want to create in another program without using matlab. Where can I get the specs, coefficients, and weights to replicate this fir filter and hamming window?

Answer 1

[Abhishek]

I suppose you want to know the filter coefficients generated and the underlying Hamming window coefficients used in the "decimate" function. The following resources would be helpful:

• The algorithms section of the "decimate" function which mentions the use of "fir1" function to design the FIR filter with given cutoff frequency. Refer to the links for more information:

https://www.mathworks.com/help/signal/ref/decimate.html

https://www.mathworks.com/help/signal/ref/fir1.html

• The 'window' argument for the "fir1" function which describes the default Hamming window used, see:

https://www.mathworks.com/help/signal/ref/hamming.html