Ken Umeno

According to our database, Ken Umeno authored at least 39 papers between 2002 and 2023.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2023

The Impact of COVID-19 on Weak-Form Efficiency in Cryptocurrency and Forex Markets.

Pavlos I. Zitis, Shinji Kakinaka, Ken Umeno, Stavros G. Stavrinides, Michael P. Hanias, Stelios M. Potirakis

Entropy, December, 2023

Investigating Dynamical Complexity and Fractal Characteristics of Bitcoin/US Dollar and Euro/US Dollar Exchange Rates around the COVID-19 Outbreak.

Pavlos I. Zitis, Shinji Kakinaka, Ken Umeno, Michael P. Hanias, Stavros G. Stavrinides, Stelios M. Potirakis

Entropy, February, 2023

Super orthogonal chaos codes with primitive roots.

Hiroki Matsuyama, Minghui Kao, Ken Umeno

JSIAM Lett., 2023

Independent component analysis communication using complex spreading sequence with constant power.

Hiroki Matsuyama, Minghui Kao, Ken Umeno

JSIAM Lett., 2023

Analysis of the limit values of chaos degree for infinite number of partitions in asymmetric tent maps.

Tomoyuki Mao, Hidetoshi Okutomi, Ken Umeno

JSIAM Lett., 2023

2022

The Reference Distributions of Maurer's Universal Statistical Test and Its Improved Tests.

Yasunari Hikima, Atsushi Iwasaki, Ken Umeno

IEEE Trans. Inf. Theory, 2022

General dynamic pricing algorithms based on universal exponential booking curves.

Masaru Shintani, Ken Umeno

JSIAM Lett., 2022

Time-Rescaling regression method for exponential decay time series predictions.

Masaru Shintani, Ken Umeno

JSIAM Lett., 2022

2021

Randomization Approaches for Reducing PAPR with Partial Transmit Sequence and Semidefinite Relaxation.

Hirofumi Tsuda, Ken Umeno

IEICE Trans. Commun., 2021

Demonstration of wireless power coloring.

Masataka Motoyama, Ken Umeno

IEICE Electron. Express, 2021

2020

Chaotic property of almost periodic frequency arrangement (APFA).

Isao Nakazawa, Ken Umeno

JSIAM Lett., 2020

2019

Investigation of the difference between Chaos Degree and Lyapunov exponent for asymmetric tent maps.

Tomoyuki Mao, Hidetoshi Okutomi, Ken Umeno

JSIAM Lett., 2019

2018

Non-Linear Programming: Maximize SINR for Designing Spreading Sequence.

Hirofumi Tsuda, Ken Umeno

IEEE Trans. Commun., 2018

Weyl Spreading Sequence Optimizing CDMA.

Hirofumi Tsuda, Ken Umeno

IEICE Trans. Commun., 2018

Randomness Test to Solve Discrete Fourier Transform Test Problems.

Atsushi Iwasaki, Ken Umeno

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018

Randomization Approaches for Reducing PAPR with Partial Transmit Sequences and Semidefinite Relaxation.

Hirofumi Tsuda, Ken Umeno

CoRR, 2018

Randomization Algorithm for Partial Transmit Sequence with Semidefinite Relaxation.

Hirofumi Tsuda, Ken Umeno

Proceedings of the 88th IEEE Vehicular Technology Conference, 2018

2017

Randomness Evaluation With the Discrete Fourier Transform Test Based on Exact Analysis of the Reference Distribution.

Hiroki Okada, Ken Umeno

IEEE Trans. Inf. Forensics Secur., 2017

One-stroke polynomials over a ring of modulo $2^w$.

Atsushi Iwasaki, Ken Umeno

JSIAM Lett., 2017

Method to Design UF-OFDM Filter and its Analysis.

Hirofumi Tsuda, Ken Umeno

CoRR, 2017

2016

Orthogonal basis spreading sequence for optimal CDMA.

Hirofumi Tsuda, Ken Umeno

JSIAM Lett., 2016

Numerical Approach to Maximize SNR for CDMA Systems.

Hirofumi Tsuda, Ken Umeno

CoRR, 2016

Non-Linear Programming: Maximize SNR for Designing Spreading Sequence - Part II: Conditions for Optimal Spreading Sequences.

Hirofumi Tsuda, Ken Umeno

CoRR, 2016

Non-Linear Programming: Maximize SNR for Designing Spreading Sequence - Part I: SNR versus Mean-Square Correlation.

Hirofumi Tsuda, Ken Umeno

CoRR, 2016

SNR Maximization as a Non-Linear Programming -Towards Optimal Spreading Sequence-.

Hirofumi Tsuda, Ken Umeno

CoRR, 2016

Further improving security of Vector Stream Cipher.

Atsushi Iwasaki, Ken Umeno

CoRR, 2016

Periodicity of odd degree Chebyshev polynomials over a ring of modulo $2^w$.

Atsushi Iwasaki, Ken Umeno

CoRR, 2016

2014

Performance Evaluation of CDMA Using Chaotic Spreading Sequence with Constant Power in Indoor Power Line Fading Channels.

Ryo Takahashi, Ken Umeno

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014

2013

Chaotic Method for Generating $q$-Gaussian Random Variables.

Ken Umeno, Aki-Hiro Sato

IEEE Trans. Inf. Theory, 2013

2012

Correlational properties of two-dimensional solvable chaos on the unit circle

Aki-Hiro Sato, Ken Umeno

CoRR, 2012

2010

Inner angle of triangle on unit circle made of consecutive three points generated by chaotic map.

Ryo Takahashi, Etsushi Nameda, Ken Umeno

JSIAM Lett., 2010

Performance Evaluation of Band-Limited Baseband Synchronous CDMA Using Orthogonal ICA Sequences.

Ryo Takahashi, Ken Umeno

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

2009

Performance Analysis of Complex CDMA Using Complex Chaotic Spreading Sequence with Constant Power.

Ryo Takahashi, Ken Umeno

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

2008

Chaos-based communication systems using on-line ICA algorithm.

Song-Ju Kim, Ken Umeno

IEICE Electron. Express, 2008

Employing LSF at Transmitter Eases MMSE Adaptation at Receiver in Asynchronous CDMA Systems.

Masahiro Yukawa, Ken Umeno, Gen Hori

EURASIP J. Wirel. Commun. Netw., 2008

2007

FPGA implementation of EASI algorithm.

Song-Ju Kim, Ken Umeno, Ryo Takahashi

IEICE Electron. Express, 2007

Solvable Performances of Optimization Neural Networks with Chaotic Noise and Stochastic Noise with Negative Autocorrelation.

Mikio Hasegawa, Ken Umeno

Proceedings of the Neural Information Processing, 14th International Conference, 2007

2004

Corrections of the NIST Statistical Test Suite for Randomness.

Song-Ju Kim, Ken Umeno, Akio Hasegawa

IACR Cryptol. ePrint Arch., 2004

2002

Construction of Optimal Chaotic Spreading Sequence Using Lebesgue Spectrum Filter.

Ken Umeno, Akihiro Yamaguchi

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002