I need to find difference equation and frequency response
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Given H(z)=(-3+z^z-1)/(1+2z^-1+3z^-2)
a) Find the difference equation
b) Plot the frequency response
回答 (2 件)
Walter Roberson
2011 年 11 月 15 日
However, it appears to me that your equation probably cannot be analyzed through these techniques, as it is not in the form of a ratio of polynomials. The z^z term is going to lead you to a lot of problems.
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Naz
2011 年 11 月 15 日
Difference equation (I assume that z^z-1 should be z^-1):
3y[n-2]+2y[n-1]+y[n]=-3x[n]+z[n-1]
Frequency response:
B=[-3 1];
A=[1 2 3];
[H,W] = freqz(B,A);
plot(W,H);
2 件のコメント
Walter Roberson
2011 年 11 月 15 日
My speculation was that the z^z-1 should be z^2 - 1 but that doesn't make sense with the leading -3 . So I still don't know what was intended.
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