VARIABLE DIGITAL-FILTER DESIGN USING THE OUTER PRODUCT EXPANSION

被引:24
作者
DENG, TB
SOMA, T
机构
[1] Inst of Physical and Chemical, Research, Saitama
来源
IEE PROCEEDINGS-VISION IMAGE AND SIGNAL PROCESSING | 1994年 / 141卷 / 02期
关键词
ID ARRAY; ID POLYNOMIAL; VARIABLE DIGITAL FILTER;
D O I
10.1049/ip-vis:19941059
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The digital filters with adjustable frequency domain characteristics are referred to as variable digital filters. Variable filters are useful in the applications where the filter characteristics are required to be changeable during the course of signal processing. Especially in real time applications, variable filters are needed to change their coefficients instantaneously such that the real time signal processing can be performed. This paper proposes a very efficient technique for variable 1D digital filter design. Generally speaking, the variable coefficients of variable digital filters are multidimensional functions of a set of spectral parameters which define the desired frequency domain characteristics. In this paper, we first sample the given variable 1D magnitude specification and use the samples to construct a multidimensional array, then propose an outer product expansion method for expanding the multidimensional array as the sum of outer products of 1D arrays (vectors). Based on the outer product expansion, we can reduce the difficult problem of designing a variable ID digital filter to the easy one that only needs constant 1D filter designs and ID polynomial approximations. The technique can obtain variable 1D filters having arbitrary desired magnitude characteristics with a high design accuracy.
引用
收藏
页码:123 / 128
页数:6
相关论文
共 13 条
  • [1] Deng T.-B., 1993, Digital Signal Processing, V3, P125, DOI 10.1006/dspr.1993.1017
  • [2] DENG TB, 1993, P JTC CSCC 93, V2, P697
  • [3] DENG TB, 1993, IEICE DSP9340 TECHN, P21
  • [4] DESIGN OF 2-D LINEAR-PHASE VARIABLE RECURSIVE DIGITAL-FILTERS FOR PARALLEL FORM IMPLEMENTATION
    HUSSEIN, AO
    FAHMY, MM
    [J]. IEE PROCEEDINGS-G CIRCUITS DEVICES AND SYSTEMS, 1991, 138 (03): : 335 - 340
  • [5] A SIMPLE APPROACH TO THE DESIGN OF LINEAR-PHASE FIR DIGITAL-FILTERS WITH VARIABLE CHARACTERISTICS
    JARSKE, P
    NEUVO, Y
    MITRA, SK
    [J]. SIGNAL PROCESSING, 1988, 14 (04) : 313 - 326
  • [6] KAWAMATA M, 1992, IEICE T FUND ELECTR, VE75A, P821
  • [7] KODAMA S, 1981, THEORY MATRICES
  • [8] DESIGN OF 3-DIMENSIONAL DIGITAL-FILTERS BASED ON THE OUTER PRODUCT EXPANSION
    OHKI, M
    KAWAMATA, M
    [J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS, 1990, 37 (09): : 1164 - 1167
  • [9] VARIABLE CUTOFF LINEAR PHASE DIGITAL-FILTERS
    OPPENHEIM, AV
    MECKLENBRAUKER, WFG
    MERSEREAU, RM
    [J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS, 1976, 23 (04): : 199 - 203
  • [10] Saito T., 1985, IEICE T B, VJ68-B, P547