A fast convergence algorithm for adaptive FIR filters with coarsely located taps. - Shigeji Ikeda; Akihiko Sugiyama (ICASSP, 1991)

Improved 4.8 kb/s CELP coding using two-stage vector quantization with multiple candidates (LCELP). - Toshiki Miyano; Masahiro Serizawa; Junichi Takizawa; Shigeji Ikeda; Kazunori Ozawa (ICASSP, 1992)

A fast convergence algorithm for sparse-tap adaptive FIR filters for an unknown number of multiple echoes. - Shigeji Ikeda; Akihiko Sugiyama (ICASSP (3), 1994)

DSP implementation and performance evaluation of sparse-tap adaptive FIR filters with tap-position control. - Akihiro Hirano; Akihiko Sugiyama; Shigeji Ikeda (ICASSP, 1996)

An adaptive noise canceller with low signal distortion for speech codecs. - Shigeji Ikeda; Akihiko Sugiyama (IEEE Trans. Signal Process., 1999)

A fast convergence algorithm for sparse-tap adaptive FIR filters identifying an unknown number of dispersive regions. - Akihiko Sugiyama; Shigeji Ikeda; Akihiro Hirano (IEEE Trans. Signal Process., 2002)