finding the transfer function in the time domain by its coefficients in Z domain

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farah arabian 2018-9-16

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https://ww2.mathworks.cn/matlabcentral/answers/419187-finding-the-transfer-function-in-the-time-domain-by-its-coefficients-in-z-domain

回答： Walter Roberson 2018-9-16

Hi, I find the coefficient of the transfer function in Z domain. So, I have the nominator and denominator coefficients for my transfer function. How can I have my transfer function (h[n]) in time domain by these coefficients?

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Answer 1

Walter Roberson 2018-9-16

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https://ww2.mathworks.cn/matlabcentral/answers/419187-finding-the-transfer-function-in-the-time-domain-by-its-coefficients-in-z-domain#answer_337014

If you have the symbolic toolbox then you can use poly2sym to create symbolic polynomials from the numerator and denominator. Divide the two, and then you can use iztrans() to get the time domain

https://www.mathworks.com/help/symbolic/compute-z-transforms-and-inverse-z-transforms.html