TY - JOUR
T1 - Quasi-equiripple approximation of minimum phase FIR filters by updating desired response
AU - Okuda, M.
AU - Khan, I. R.
AU - Ikehara, M.
AU - Takahashi, S.
PY - 2004/6
Y1 - 2004/6
N2 - The authors present a new numerical method for the Chebyshev approximation of minimum phase FIR digital filters. This method is based on solving a least squares (LS) problem iteratively. At each iteration, the desired response is transformed so as to have an equiripple magnitude error. This method makes it possible to design minimum phase FIR filters whose magnitude error is quasi-equiripple. Using this method, a quasi-equiripple solution is obtained very quickly. Since the proposed methods do not require any time-consuming optimisation procedure, they require less computational complexity than conventional methods. Finally, some examples to illustrate the advantage of the proposed methods are shown.
AB - The authors present a new numerical method for the Chebyshev approximation of minimum phase FIR digital filters. This method is based on solving a least squares (LS) problem iteratively. At each iteration, the desired response is transformed so as to have an equiripple magnitude error. This method makes it possible to design minimum phase FIR filters whose magnitude error is quasi-equiripple. Using this method, a quasi-equiripple solution is obtained very quickly. Since the proposed methods do not require any time-consuming optimisation procedure, they require less computational complexity than conventional methods. Finally, some examples to illustrate the advantage of the proposed methods are shown.
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U2 - 10.1049/ip-vis:20040139
DO - 10.1049/ip-vis:20040139
M3 - Article
AN - SCOPUS:3242805165
VL - 151
SP - 164
EP - 169
JO - IEE Proceedings: Vision, Image and Signal Processing
JF - IEE Proceedings: Vision, Image and Signal Processing
SN - 1350-245X
IS - 3
ER -