摘要1 Preliminaries The mathematical definition of the two-dimensional optical orthogonal code(2-D OOC)is as follows: Definition 1. A(mn, ω,λ_a,λ_c) 2-DOOC consists of a set of(O, 1) m×n matri-
10WU Guoqing,REN Rui and CHEN Yaoming(Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080).Wavelet transform implementation by layers[J].Chinese Journal of Acoustics,1996,15(2):152-156.