- Jun 5, 2020
You seem to know a lot about this stuff. Can you answer my question? Thanks.It's not a side effect. All these things are inextricably linked.
In a min phase system, you get all of the filter's output after the input impulse.
In a linear phase system, the filter delays the impulse and produces symmetric output before and after the input impulse.
Mixed-phase is just that, a mix of the two (or even of max phase).
FIR just means that the filter is stored literally as a sampled impulse response. Filtering happens through convolution (which can be implemented as trivially as multiplying each tap aka sample of the reversed FIR with the input signal, adding them up producing an output sample and then shifting the FIR one sample ahead, repeat the same for the next output sample).
The cool thing about it is that you can design arbitrary linear filters, that is with arbitrary frequency response (magnitude and phase).