Improved design of minimum-phase FIR digital filters by cepstrum and fast Hartley transform
Soo‐Chang Pei, Sy-Been Jaw · Electronics Letters · 1990
An equiripple minimum-phase FIR filter is designed using the cepstrum and the fast Hartley transform (FHT). This fast procedure is performed entirely in the real domain and requires only two short-length FHT computations. This method avoids complicated phase wrapping and greatly reduces the aliasing error.