Complex approximation of 2-D digital filters with prescribed log magnitude and phase response

Masahiro Okuda, Kaori Matsuda, Masaaki Ikehara, Shin ichi Takahashi

    Research output: Contribution to conferencePaperpeer-review

    Abstract

    In this paper, we propose a new design algorithm for nearly linear phase 2-D IIR (FIR) digital filters with prescribed log magnitude response. The error function used here is the sum of the weighted log magnitude-squared error and phase-squared error, and so it's possible to control log magnitude and phase response independently. The gradient vector of the proposed error function is easily calculated as the closed form solution because of the nature, in which the real and imaginary part of the logarithm of a complex transfer function corresponds to the log magnitude and phase response, respectively. This algorithm is simple and converges quickly. Finally, we show the validity of the proposed algorithm with some examples.

    Original languageEnglish
    Pages388-393
    Number of pages6
    Publication statusPublished - 1996 Dec 1
    EventProceedings of the 1996 IEEE Region 10 TENCON - Digital Signal Processing Applications Conference. Part 2 (of 2) - Perth, Aust
    Duration: 1996 Nov 261996 Nov 29

    Other

    OtherProceedings of the 1996 IEEE Region 10 TENCON - Digital Signal Processing Applications Conference. Part 2 (of 2)
    CityPerth, Aust
    Period96/11/2696/11/29

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering

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