chap4

chap4 傅立叶快速发表于 2025-04-20

＝ 2r＋ 1 r=0,1,…,N/2 1        112222002 22NNrn rnNNnnNNX k X r x n x n W x n x n W                                 11222120021 22NNrn n rnN N