TY - GEN
T1 - Design of real and complex linear-phase IIR modified QMF banks
AU - Fernandez-Vazquez, Alfonso
AU - Jovanovic-Dolecek, Gordana
PY - 2006
Y1 - 2006
N2 - A design of linear-phase IIR (Infinite Impulse Response) modified QMF banks including both real and complex valued coefficients is proposed. This design is based on parallel structure of two complex allpass filters. We first introduce a complex analog allpass filter, designed using elliptic functions and the PR (Perfect Reconstruction) conditions. We use bilinear transformation to obtain the digital counterpart of this analog allpass filter. Depending on the parity of the order N of the complex allpass filter, the resulting IIR filters in the filter bank can be either real or complex. If N is even, the IIR filters are real, otherwise they are complex. Using complex IIR analysis filters, the corresponding magnitude responses have an extra zero around ω = 3π/2. The method is illustrated by means of examples.
AB - A design of linear-phase IIR (Infinite Impulse Response) modified QMF banks including both real and complex valued coefficients is proposed. This design is based on parallel structure of two complex allpass filters. We first introduce a complex analog allpass filter, designed using elliptic functions and the PR (Perfect Reconstruction) conditions. We use bilinear transformation to obtain the digital counterpart of this analog allpass filter. Depending on the parity of the order N of the complex allpass filter, the resulting IIR filters in the filter bank can be either real or complex. If N is even, the IIR filters are real, otherwise they are complex. Using complex IIR analysis filters, the corresponding magnitude responses have an extra zero around ω = 3π/2. The method is illustrated by means of examples.
KW - All-pass filters
KW - Filter banks
KW - IIR filters
KW - Linear-phase filters
UR - http://www.scopus.com/inward/record.url?scp=50249150785&partnerID=8YFLogxK
U2 - 10.1109/APCCAS.2006.342272
DO - 10.1109/APCCAS.2006.342272
M3 - Contribución a la conferencia
AN - SCOPUS:50249150785
SN - 1424403871
SN - 9781424403875
T3 - IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS
SP - 1063
EP - 1066
BT - APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems
T2 - APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems
Y2 - 4 December 2006 through 6 December 2006
ER -