65 citations · 156 across the 21 of their papers we have counts for
7 papers · 1 filter
Active Noise Control with Sampled-Data Filtered-x Adaptive Algorithm
Masaaki Nagahara, Ken-ichi Hamaguchi, Yutaka Yamamoto
Analysis and design of filtered-x adaptive algorithms are conventionally done by assuming that the transfer function in the secondary path is a discrete-time system. However, in re…
H-infinity Design of Periodically Nonuniform Interpolation and Decimation for Non-Band-Limited Signals
Masaaki Nagahara, Masaki Ogura, Yutaka Yamamoto
In this paper, we consider signal interpolation of discrete-time signals which are decimated nonuniformly. A conventional interpolation method is based on the sampling theorem, and…
H-infinity Optimal Approximation for Causal Spline Interpolation
Masaaki Nagahara, Yutaka Yamamoto
In this paper, we give a causal solution to the problem of spline interpolation using H-infinity optimal approximation. Generally speaking, spline interpolation requires filtering…
Signal Reconstruction via H-infinity Sampled-Data Control Theory: Beyond the Shannon Paradigm
Yutaka Yamamoto, Masaaki Nagahara, Pramod P. Khargonekar
This paper presents a new method for signal reconstruction by leveraging sampled-data control theory. We formulate the signal reconstruction problem in terms of an analog performan…
H-Infinity-Optimal Fractional Delay Filters
Masaaki Nagahara, Yutaka Yamamoto
Fractional delay filters are digital filters to delay discrete-time signals by a fraction of the sampling period. Since the delay is fractional, the intersample behavior of the ori…
Frequency Domain Min-Max Optimization of Noise-Shaping Delta-Sigma Modulators
Masaaki Nagahara, Yutaka Yamamoto
This paper proposes a min-max design of noise-shaping delta-sigma modulators. We first characterize the all stabilizing loop-filters for a linearized modulator model. By this chara…
Optimal Discretization of Analog Filters via Sampled-Data H-infinity Control Theory
Masaaki Nagahara, Yutaka Yamamoto
In this article, we propose optimal discretization of analog filters (or controllers) based on the theory of sampled-data H-infinity control. We formulate the discretization proble…