matlab - Non causal zero-phase FIR with the windowing method -

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I am trying to create a zero phase non-causal FIR filter with windowing method in MATLAB. It seems that I can only get a linear phase FIR filter.

Also the impulse response is always the reason, I can use fvtool to analyze filters, maybe this is not the right tool for this? I see that I get different results with freqzplot (now obsolete). I

Edit: I need to react to the impulse of the zero phase filter which is in the form of the input of a function Another fir produces a linear phase with I 2n + 1 coefficient is a continuous delay of FIR filter N samples, so that you can. Just implement such a filter and make changes in the time of N specimens and it will be necessary when necessary, any non-cause, zero phase filter.

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