摘要
该文讨论了计算二维单边逆Z变换的一般方法，将二维序列分为几种情形：可分序列．有限长序列、其它序列，给出的计算方法则有一维法、偏导数法、二维连卷积法、二维围线积分法、二维逆卷积法等。二维逆Z变换远比一维情形复杂，表现在二维收敛域、二元因式分解、庞大的计算量等方面．该文的方法适用于求取较为简单的二维逆Z变换问题，尤以偏导数法和逆卷积法史具实际意义。
This paper discusses usual methods to 2-D singleside inverse-Z transform.The 2-D sequences are derided into several kinds; seperate, length finite, and others; and the given methods are 1-D method, partial-derivative method, 2-D combined convolution, 2-D contour integral and 2-D deconvolution method. Because inverse-Z transform in the case of 2-D is much more complicated than that in 1-D, which appears in 2-D convergent region or two variates factorization or teriable corn putations, etc. So the methods given in this paper can be used to get some simple inverse-Z transform. The partial-derivative method and deconvolution method are of practical use.
出处
《南京理工大学学报》
CAS
CSCD
1996年第2期170-173,共4页
Journal of Nanjing University of Science and Technology
关键词
序列
Z变换
二维问题
逆卷积
围线积分
sequences, Z-transform, 2-D problem, deconvolution
contour integrals
