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0
votes
0answers
35 views
Discrete Fourier Transform Vs. Inverse Discrete Fourier Transform (Division by Number of Samples) [closed]
I've noticed that there are two possible notations for both DFT and IDFT.
The First One
DFT:
$$
y_i = \sum_{j = 0}^{n - 1} x_j \cdot \omega_n^{i \cdot j}, i = 0, \dots, n - 1
$$
IDFT:
$$
x_i = ...
5
votes
1answer
65 views
Use Butterworth and Chebychev filters
I need to calculate frequency response, phase response and apply to signals the Butterworth, Chebychev1 and Chebychev2 band-pass filters.
I'm developing in C++ with Qt, and I'm looking for algorithms ...
