High tuning accuracy design of variable IIR digital filters

Our recent results in the design of high tuning accuracy variable IIR filters are given in this work. The accuracy and the range of tuning are increased by minimization of the sensitivity of the structures (real and complex) used and by developing of new method of design based on cascaded identical sub-filters. Several new variable multioutput second-order IIR digital filter sections also are proposed. All theoretical results derived are verified experimentally.

[1]  S. C. Chan,et al.  On the design and implementation of FIR and IIR digital filters with variable frequency characteristics , 2002 .

[2]  Tian-Bo Deng,et al.  Design of linear-phase variable 2-D digital filters using matrix-array decomposition , 2003, IEEE Trans. Circuits Syst. II Express Briefs.

[3]  Masayuki Kawamata,et al.  Narrowband Variable Digital Filters with Independently Tunable Characteristics and Minimum Number of Tunable Elements , 1998 .

[4]  Masayuki Kawamata,et al.  Variable biquadratic digital filter section with simultaneous tuning of the pole and zero frequencies by a single parameter , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[5]  A. Nishihara.  Low-sensitivity second-order digital filters ― Analysis and design in terms of frequency sensitivity , 1984 .

[6]  Masato Ito,et al.  A synthesis of variable wave digital filters , 1994 .

[7]  Sanjit K. Mitra,et al.  Design of Digital Bandpass/Bandstop Filters with Independent Tuning Characteristics , 1990 .

[8]  Tian-Bo Deng.  An improved method for designing variable recursive digital filters with guaranteed stability , 2001, Signal Process..

[9]  Masayuki Kawamata,et al.  New first- and second-order very low sensitivity bandpass/bandstop complex digital filter sections , 1997, TENCON '97 Brisbane - Australia. Proceedings of IEEE TENCON '97. IEEE Region 10 Annual Conference. Speech and Image Technologies for Computing and Telecommunications (Cat. No.97CH36162).

[10]  Masayuki KAWAMATA,et al.  Variable IIR Filters Sections with High Accuracy Independently Tunable Center Frequency and Bandwidth , .

[11]  Tian-Bo Deng.  New method for designing stable recursive variable digital filters , 1998, Signal Process..

[12]  Eiji Watanabe,et al.  Synthesis of variable IIR digital filters with complex coefficients , 1994 .

[13]  M. M. Fahmy,et al.  A design technique for variable digital filters , 1989 .

[14]  Akinori Nishihara,et al.  Minimization of sensitivities in digital filters by coefficient conversion , 1980 .

[15]  Anthony G. Constantinides,et al.  Spectral Transformations for Digital Filters , 1970 .

[16]  I. P. Topalov,et al.  Low-sensitivity universal first-order digital filter sections without limit cycles , 1990 .

[17]  G. Stoyanov,et al.  Improved tuning accuracy design of parallel-allpass-structures-based variable digital filters , 1998, ISCAS '98. Proceedings of the 1998 IEEE International Symposium on Circuits and Systems (Cat. No.98CH36187).

[18]  Sanjit K. Mitra,et al.  Design of recursive digital filters with variable characteristics , 1990, Int. J. Circuit Theory Appl..

[19]  Tian-Bo Deng,et al.  Design and parallel implementation of FIR digital filters with simultaneously variable magnitude and non-integer phase-delay , 2003, IEEE Trans. Circuits Syst. II Express Briefs.

[20]  Eiji Watanabe,et al.  A synthesis of a class of complex digital filters based on circuitry transformations , 1991 .

[21]  Masayuki Kawamata,et al.  Very Low Sensitivity Complex Coefficients Band-Pass Filter Sections , 1996 .