Design of IIR digital filters based on eigenvalue problem. - Xi Zhang; Hiroshi Iwakura (IEEE Trans. Signal Process., 1996)

Variable Taylor realization and improved approximation of FIR fractional delay systems. - Saed Samadi; Hiroshi Iwakura (Int. J. Circuit Theory Appl., 1998)

Generalized half-band maximally flat FIR filters. - Saed Samadi; Akinori Nishihara; Hiroshi Iwakura (ISCAS (3), 1999)

Design and multiplierless realization of maximally flat FIR digital Hilbert transformers. - Saed Samadi; Yoshihito Igarashi; Hiroshi Iwakura (IEEE Trans. Signal Process., 1999)

Design of IIR digital allpass filters based on eigenvalue problem. - Xi Zhang; Hiroshi Iwakura (IEEE Trans. Signal Process., 1999)

Universal maximally flat lowpass FIR systems. - Saed Samadi; Akinori Nishihara; Hiroshi Iwakura (IEEE Trans. Signal Process., 2000)

Optimal design of fir filters in complex Chebyshev sense using semi-infinite programming method. - Kenji Suyama; Ken'ichi Takada; Ryuichi Hirabayashi; Hiroshi Iwakura (ICASSP, 2002)