x1(n)=R5(n),x2(n)=nR5(n),計(jì)算,取圓周卷積長(zhǎng)度為L(zhǎng)=7 .
計(jì)算序列N點(diǎn)的DFT,主值區(qū)間0≤n≤N-1 (1)x(n)=δ(n) (2)x(n)=Rm(n),0〈m〈N-1 (3)x(n)=1
(1) (2) (3)