Trirat, Akraphon

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Trirat, Akraphon
Alternative Name
Trirat, A.
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Email
akraphon.tr@kmitl.ac.th

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    Item type:Publication,
    Design of multiplierless elliptic narrowband IIR digital filter based on sensitivity analysis
    (2004-12-01)
    Trirat, Akraphon
    ;
    Chivapreecha, Sorawat
    ;
    Khunaworawet, Tanawut
    ;
    Ruangrangsan, Teerasak
    ;
    Dejhan, Kobchai
    In this paper, we present a technique for the design of narrow-band multiplierless IIR filter based on sensitivity analysis. All the multiplication constants in proposed filter structure are implemented with a small number of shift registers and adders. It is shown in the paper that by appropriated design of the elliptic minimal Q - factor (EMQF) prototyped transfer function, (n+1)/2 multiplication constants of highest sensitivity can be implemented without quantization. The quantization of the remaining (n-1)/2 less-sensitivity constants is performed using phase-tolerence scheme.
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    Item type:Publication,
    TMS 320C31-based narrow-band noise rejection Kalman filter implementation
    (2002-01-01)
    Dejhan, K.
    ;
    Yimmun, S.
    ;
    Trirat, A.
    ;
    Cheevasuvit, F.
    This paper proposes a design and development of narrow frequency band filter based on Kalman algorithm by using TMS 320C31 as processor. The center frequency of this filter is between 10 Hz to 1.5 kHz by changing the coefficient of sinusoidal model in normal form realization and the results have been carried out. It is used to reject the narrow-band noises.