A new DSP-oriented algorithm for calculation of the square root using a nonlinear digital filter. - Naoki Mikami; Masaki Kobayashi; Yukiko Yokoyama (IEEE Trans. Signal Process., 1992)

Roundoff-error reduction for evaluation of a function by polynomial approximation with error feedback in fixed-point arithmetic. - Naoki Mikami; Masaki Kobayashi; Yukiko Yokoyama (IEEE Trans. Signal Process., 1993)

A new method of nonstationary time series analysis based on inhomogeneous AR equation. - Yukiko Yokoyama; Mineo Kumazawa; Yuichi Imanishi; Naoki Mikami (IEEE Trans. Signal Process., 1997)