ぎゃく高速 こうそくフーリエ変換 へんかんであれば
gyakukōsokufūriehenkandeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 逆高速フーリエ変換

1. if it were an inverse fast Fourier transform; if it is an inverse fast Fourier transform

Ba Conditional
Mathematics