#### Filter Results:

#### Publication Year

2006

2016

#### Publication Type

#### Co-author

#### Publication Venue

#### Key Phrases

#### Organism

Learn More

- Shinya Sugiura, Akihisa Ichiki, Yukihiro Tadokoro
- IEEE Signal Processing Letters
- 2012

In this letter, the concept of multiple serially-concatenated codes is invoked in the context of stochastic resonance (SR), where the achievable performance is improved by increasing noise power. More specifically, the receiver's iterative decoding process is characterized with the aid of extrinsic information transfer (EXIT) charts, such that the SR effect… (More)

- Akihisa Ichiki, Yukihiro Tadokoro, M I Dykman
- Physical review. E, Statistical, nonlinear, and…
- 2012

We show that weak periodic driving can exponentially strongly change the rate of escape from a potential well of a system driven by telegraph noise. The analysis refers to an overdamped system, where escape requires that the noise amplitude θ exceed a critical value θ(c). For θ close to θ(c), the exponent of the escape rate displays a nonanalytic dependence… (More)

- Akihisa Ichiki, Masayuki Ohzeki
- Physical review. E, Statistical, nonlinear, and…
- 2015

Acceleration of relaxation toward a fixed stationary distribution via violation of detailed balance was reported in the context of a Markov chain Monte Carlo method recently. Inspired by this result, systematic methods to violate detailed balance in Langevin dynamics were formulated by using exponential and rotational nonconservative forces. In the present… (More)

- Akihisa Ichiki, Yukihiro Tadokoro
- Physical review. E, Statistical, nonlinear, and…
- 2013

In the study of stochastic resonance, it is often mentioned that nonlinearity can enhance a weak signal embedded in noise. In order to give a systematic proof of the signal enhancement in nonlinear systems, we derive an optimal nonlinearity that maximizes a signal-to-noise ratio (SNR). The obtained optimal nonlinearity yields the maximum unbiased signal… (More)

- Yasuomi D Sato, Keiji Okumura, Akihisa Ichiki, Masatoshi Shiino, Hideyuki Câteau
- Physical review. E, Statistical, nonlinear, and…
- 2012

We study two firing properties to characterize the activities of a neuron: frequency-current (f-I) curves and phase response curves (PRCs), with variation in the intrinsic temperature scaling parameter (μ) controlling the opening and closing of ionic channels. We show a peak of the firing frequency for small μ in a class I neuron with the I value… (More)

- Yukihiro Tadokoro, Seiya Kasai, Akihisa Ichiki, Hiroya Tanaka
- IEEE Trans. Systems, Man, and Cybernetics…
- 2016

- Yukihiro Tadokoro, Seiya Kasai, Akihisa Ichiki
- Digital Signal Processing
- 2015

a r t i c l e i n f o a b s t r a c t Keywords: Stochastic resonance Sub-threshold signal External noise Arrayed system In–out correlation Stochastic resonance offers the possibility of signal amplification by the addition of noise. This curious, interesting phenomenon has received considerable attention since the 1990s. Since such effect has the potential… (More)

- Seiya Kasai, Yukihiro Tadokoro, Akihisa Ichiki
- Physical review. E, Statistical, nonlinear, and…
- 2013

We design nonlinear functions for the transmission of a small signal with non-Gaussian noise and perform experiments to characterize their responses. Using statistical design theory [A. Ichiki and Y. Tadokoro, Phys. Rev. E 87, 012124 (2013)], a static nonlinear function is estimated from the probability density function of the given noise in order to… (More)

- Yukihiro Tadokoro, Akihisa Ichiki
- 2013 IEEE International Conference on Acoustics…
- 2013

Stochastic resonance (SR) is a physical phenomenon through which system performance is enhanced by noise. Applications of SR in signal processing are expected to realize the detection of a weak signal buried in strong noise. Extraction of the effect of SR requires the design of an effective nonlinear system. Although a number of studies have investigated… (More)