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user 390
In signal processing, a filter is a device or process that transforms a signal by selectively choosing specific frequencies and leaving others with appropriate gain or as it is.
1
vote
1
answer
4k
views
How to normalize predesigned IIR filter coefficients to have unity gain?
There is a low pass filter with difference equation already provided.
$$
y_n = (x_n - 2x_{n-6} + x_{n-12}) - (-2y_{n-1} + y_{n-2})
$$
$$
a_0 = 1, a_1 = -2, a_2 = 1
$$
$$
b_0 = 1, b_6 = -2, b_{12} = …
- 287
1
vote
1
answer
617
views
Transfer function, amplitude response and difference equation for a filter
I've found a paper with a filter described in terms of transfer function, amplitude response and difference equation:
transfer function of the second-order low-pass filter:
$$
H(z) = \frac{(1-z^{-6} …
- 287