Theory of Acceleration of Decision‐Making by Correlated Time Sequences

N Okada, T Yamagami, N Chauvet, Y Ito… - …, 2022 - Wiley Online Library
Photonic accelerators have been intensively studied to provide enhanced information
processing capability to benefit from the unique attributes of physical processes. Recently, it …

Design of binary sequences with tunable exponential autocorrelations and run statistics based on one-dimensional chaotic maps

A Tsuneda - IEEE Transactions on Circuits and Systems I …, 2005 - ieeexplore.ieee.org
This paper describes simple design methods of chaotic binary sequences with prescribed
exponential autocorrelation properties and run statistics. We employ one-dimensional …

Blind source separation of chaotic laser signals by independent component analysis

M Kuraya, A Uchida, S Yoshimori, K Umeno - Optics Express, 2008 - opg.optica.org
We experimentally demonstrate blind source separation of chaos generated in Nd: YVO_4
microchip solid-state lasers by using independent component analysis. Two chaotic source …

Performance analysis of complex CDMA using complex chaotic spreading sequence with constant power

R Takahashi, K Umeno - IEICE transactions on fundamentals of …, 2009 - search.ieice.org
A performance of the complex chaotic spreading sequences with constant power is
investigated in a chip-synchronous complex CDMA with a complex scrambling. We estimate …

Solvable performances of optimization neural networks with chaotic noise and stochastic noise with negative autocorrelation

M Hasegawa, K Umeno - International Conference on Neural Information …, 2007 - Springer
By adding chaotic sequences to a neural network that solves combinatorial optimization
problems, its performance improves much better than the case that random number …

Theory and applications of chaotic optimization methods

T Ikeguchi, M Hasegawa, T Kimura, T Matsuura… - … Computing Methods and …, 2011 - Springer
Introduction In our society, various combinatorial optimization problems exist and we must
often solve them, for eg scheduling, delivery planning, circuit design, and computer wiring …

Realizing ideal spatiotemporal chaotic searching dynamics for optimization algorithms using neural networks

M Hasegawa - International Conference on Neural Information …, 2010 - Springer
This paper proposes an optimization algorithm, which utilizes ideal spatiotemporal chaotic
dynamics for solution search in a high dimensional solution space. Such chaotic dynamics is …

[PDF][PDF] Independent component analysis of mixed chaotic signals for communications systems

K Umeno - NONLINEAR PHENOMENA IN COMPLEX SYSTEMS …, 2007 - academia.edu
Code Division Multiple Access (CDMA) is a currently used data transmission technique for
the third generation mobile communication system. In CDMA, each user is assigned a …

Improving performance of heuristic algorithms by lebesgue spectrum filter

M Hasegawa - IEICE Transactions on Communications, 2016 - search.ieice.org
The previous researches on the chaotic CDMA have theoretically derived the chaotic
sequences having the minimum asynchronous cross-correlation. To minimize the …

[PDF][PDF] Generating complete orthogonal spreading sequences by equivariant adaptive separation via independence for CDMA

R Takahashi, SJ Kim, K Umeno - Proc. 15th IEEE Int. Workshop on …, 2007 - researchgate.net
It is found that the spreading sequences which have the almost complete orthogonality
obtained by the FastICA, one of the Independent Component Analysis (ICA) algorithms, can …