Determine if an impulse is minimum phase and compute a zero-phase equivalent
To find the zero-phase impulse response, simply take the Fourier transform of your signal, find magnitude and find the inverse Fourier transform of that. Mathematically speaking,

$$\mathscr{F}^{-1}\{\text{abs}\left(\mathscr{F}\{x[n]\}\right)\}$$

This essentially says that the entire Fourier transform of your new sequence is real-valued. All real-valued numbers have zero phase.