hey, starting to see what you mean much more clear, cool, really excited. Thanks a lot!!!!!
2013/9/24 Alexandre Torres Porres <[email protected]> > so you're basically saying all i need to use is use only the real part, > right? > > my frankenstein was working and alive for several times until i tried some > bandpass coeff, let's se if i fix this now :) > > > 2013/9/24 Funs Seelen <[email protected]> > >> >> >> >> On Tue, Sep 24, 2013 at 3:08 PM, Funs Seelen <[email protected]>wrote: >> >>> On Tue, Sep 24, 2013 at 2:50 PM, Alexandre Torres Porres < >>> [email protected]> wrote: >>> >>>> one doubt emerges really soon anyway. Since they are complex (there are >>>> two coordinate numbers for each pole and zero) how do I get only one number >>>> by, for example, summing or multiplying one pole to the other? as in: >>>> >>>> *b1* = -(P0 + P1) >>>> *b2* = (P0*P1) >>>> >>> >>> You don't, the coefficients can be complex too. However, I discovered >>> that mirroring (*) every pole and zero results in just real values without >>> imaginary part. I don't have any mathematical proof for this, but it >>> probably wouldn't be too hard to find such. >>> >> >> I remembered again, it's called the complex conjugate. >> http://en.wikipedia.org/wiki/Complex_conjugate >> >> >> >>> >>> *) adding another pole/zero for each complex one, like z=-j if you >>> already have a z=j. >>> >> >> >
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