Publications

131 results

User and Passive Beam Scheduling Scheme for Liquid Crystal IRS-Assisted mmWave Communications

Keiji Yoshikawa, Takuya Ohto, Takahiro Hayashi

The 18th European Conference on Antennas and Propagation (EuCAP 2024)

March 2024

Beam Training of LoS-MIMO Systems Using Subarray-Based Beamforming in the Presence of Ground Reflection

Masahiro Takigawa, Ryochi Kataoka, Issei Kanno, Yoji Kishi (KDDI)

The 18th European Conference on Antennas and Propagation (EuCAP 2024)

March 2024

Analysis of Clock Distribution in User-centric Radio Access Network for Cell-free Massive MIMO

Takahide Murakami, Naoki Aihara, Yu Tsukamoto, Akio Ikami, Hiroyuki Shinbo, Yoshiaki Amano

IEEE Consumer Communications & Networking Conference (CCNC) 2024

January 2024

Multi-homing AP Connection for Cell-Free massive MIMO in Distributed CPU Environment

Naoki Aihara, Akio Ikami, Yu Tsukamoto, Takahide Murakami, Hiroyuki Shinbo, Yoshiaki Amano

IEEE Consumer Communications & Networking Conference (CCNC) 2024

January 2024

Interference-Aware Analog Beam Selection for Cell-Free Massive MIMO with Hybrid Beamforming over Millimeter-Wave Channels

Shunsuke Kamiwatari, Masaaki Ito, Issei Kanno, Kengo Ando(The University of Electro-Communications), Koji Ishibashi(The University of Electro-Communications)

IEEE Consumer Communications & Networking Conference (CCNC) 2024

January 2024

Antenna Design for Robust Millimeter Wave LoS-MIMO Link in Mobile Analog Repeater Achieving Low Latency and High Capacity

Masahiro Takigawa, Ryochi Kataoka, Issei Kanno, Yoji Kishi

IEEE Consumer Communications & Networking Conference (CCNC) 2024

January 2024

Stochastic Geometry-Based Performance Analysis with Correlated Shadowing in Distributed Antenna Systems

Wei-Yu Chen(USC), Masaaki Ito, Issei Kanno, Thomas Choi(USC), Andreas F. Molisch(USC)

The 2023 IEEE Global Communications Conference (GLOBECOM)

December 2023

User-centric AP Clustering with Deep Reinforcement Learning for Cell-Free Massive MIMO

Yu Tsukamoto, Akio Ikami, Naoki Aihara, Takahide Murakami, Hiroyuki Shinbo, Yoshiaki Amano

The 21st ACM International Symposium on Mobility Management and Wireless Access (MobiWac'23)

October 2023

Low-Complexity Digital Predistortion of RF PowerAmplifiers Based on FastGRNN

Taishi Watanabe, Takeo Ohseki, Issei Kanno, Yoshiaki Amano

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

Millimeter Wave Path Loss Modeling using Multi-Resolution Map Based on ResNet

Tatsuya Nagao, Takahiro Hayashi

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

Feature Extraction Using Hough Transform in RadioPropagation Estimation

Rento Hagiwara(Yokohama National University), Koichi Ichige(Yokohama National University), Tatsuya Nagao, Takahiro Hayashi

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

User-centric Virtualized CPU Deployment and AP Clustering for Scalable Cell-Free Massive MIMO

Akio Ikami, Yu Tsukamoto, Naoki Aihara, Takahide Murakami,Hiroyuki Shinbo, Yoshiaki Amano

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

Measurement-based Evaluation of Path loss and Propagation Mechanisms in the 300 GHz band

Satoshi Ito, Kazuki Takezawa, Takahiro Hayashi

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

TOA-Based Positioning Scheme for IRS-Assisted 5GNetworks

Tomofumi Kanno, Takuya Ohto, Hiromi Matsuno, Tatsuya Nagao, Takahiro Hayashi

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

Always-Connected Enablement Base Station to eliminatethe effects of RRC transitions delay

Takeo Ogawara, Kenichi Okonogi, Akito Suzuki, Masayuki Kurata,Sohei Itahara, Tomoyuki Nagano(KDDI), Masaki Suzuki

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

Estimation Method for Human Blockage Loss in the 300GHz Band

Satoshi Ito, Kazuki Takezawa, Takahiro Hayashi

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

Element Failure Correction for Reconfigurable MetasurfaceReflectors

Takuya Ohto, Hiromi Matsuno, Takahiro Hayashi, Mitsutaka Okita(Japan Display Inc.), Daiichi Suzuki(Japan Display Inc.), Kazuki Matsunaga(Japan Display Inc.), Shinichiro Oka(Japan Display Inc.)

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

Data Rate Control for C-V2X Services in a Single PDUSession based on Expected Maximum Bitrate

Tetsu Joh, Masaki Suzuki, Takeshi Kitahara(KDDI), Tomohiro Otani(KDDI)

The 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)

October 2023

A Study on Determination Method of IRS Reflection Patterns Using Radio Environmental Map

Tomofumi Kanno, Hiromi Matsuno, Takuya Ohto, Tatsuya Nagao, Michihiro Harada, Takahiro Hayashi

2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (IEEE AP-S/URSI 2023)

July 2023

Prediction Method for Incident Angle Characteristics of Bistatic RCS of Reflectarray

Hiroshi Hashiguchi( National Defense Academy), Naobumi Michishita( National Defense Academy), Hisashi Morishita( National Defense Academy), Hiromi Matsuno, Takuya Ohto, Masayuki Nakano

2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (IEEE AP-S/URSI 2023)

July 2023

Lightweight AP Selection Algorithm for Uniform QualityEverywhere in Cell-Free Massive MIMO

Akio Ikami, Yu Tsukamoto, Naoki Aihara, Takahide Murakami, Hiroyuki Shinbo

The 14th International Conference on Ubiquitous and Future Networks (ICUNF 2023)

July 2023

Adaptive Bit Allocation for SVD based Hybrid Processing of Uplink Cell-Free Massive MIMO under Limited Fronthaul Capacity

Issei Kanno, Masaaki Ito, Yoshiaki Amano, Yoji Kishi, Thomas Choi(USC), Wei Yu Chen(USC), Andreas F. Molisch(USC)

2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring)

June 2023

RNN-Based Path Loss Modeling with Variable-Size MapData in Urban Environments

Tatsuya Nagao, Takahiro Hayashi

2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring)

June 2023

Low-Cost Path Loss Estimation Using Correlation GraphCNN with Novel Feature Parameters

Keita Imaizumi(Yokohama National University), Koichi Ichige(Yokohama National University), Tatsuya Nagao, Takahiro Hayashi

2023 IEEE 97th Vehicular Technology Conference(VTC2023-Spring)

June 2023

Measurements and Simulation of Radio Propagation on the Lunar Surface

Akira Akasaka, Feng Lu, Akira Yamaguchi, Kazunori Takeuchi, Hiroyuki Shinbo

The 34th International Symposium on Space Technology and Science (ISTS)

June 2023

A Study of Building Map Representation for Delay Spread Estimation Model using Machine Learning

Keiji Yoshikawa, Tatsuya Nagao, Kazuki Takezawa, Satoshi Ito, Takahiro Hayashi

The 17th European Conference on Antennas and Propagation (EuCAP 2023)

March 2023

High-Accuracy and High-Speed Beam Tracking Algorithm for THz Short-Range Mobile Communication

Hiromi Matsuno, Tatsuya Nagao, Takahiro Hayashi

The 17th European Conference on Antennas and Propagation (EuCAP 2023)

March 2023

Overloaded Pilot Assignment with Pilot Decontamination for Cell-Free Systems

Noboru Osawa, Fabian Göttsch (Technische Universität Berlin), Issei Kanno, Takeo Ohseki, Yoshiaki Amano, Giuseppe Caire (Technische Universität Berlin), Kosuke Yamazaki

2023 IEEE Wireless Communications and Networking Conference (WCNC)

March 2023

Basic Performance Evaluation of Low Latency and High Capacity Relay Method in Millimeter-Wave Bands

Ryochi Kataoka, Masahiro Takigawa, Takeo Ohseki, Taishi Watanabe, Yoshiaki Amano

2023 IEEE Wireless Communications and Networking Conference (WCNC)

March 2023

Digital Predistortion of RF Power Amplifiers using DeepShift

Taishi Watanabe, Takeo Ohseki , Yoshiaki Amano

2023 IEEE Wireless Communications and Networking Conference (WCNC)

March 2023

Wide Beamwidth and High Gain Reflection Pattern Design Method for Intelligent Reflecting Surface

Hiromi Matsuno, Takuya Ohto, Takahiro Hayashi, Mitsutaka Okita(Japan Display), Daiichi Suzuki(Japan Display), Kazuki Matsunaga(Japan Display), Shinichiro Oka(Japan Display)

2023 IEEE Wireless Communications and Networking Conference (WCNC)

March 2023

A Parallel Processing Method of Large-scale System Level Simulator for Advanced 5G System

Megumi Shibuya, Akira Yamaguchi, Takahide Murakami, Hiroyuki Shinbo

The 19th International Conference on Networking and Services (ICNS 2023)

March 2023

Measurements of Reflection Characteristics of the Lunar Surface for Radio Propagation

Akira Akasaka, Feng Lu(KDDI), Akira Yamaguchi, Kazunori Takeuchi, Hiroyuki Shinbo

The international IEEE Aerospace Conference 2023

March 2023

Method of Discriminating Wireless Link Status for Safe Operation Architecture of Mobile Robots

Ko Matsuhiro, Hiroyuki Shinbo, Hiroyuki Ishii, Atsuo Takanishi

2023 IEEE/SICE International Symposium on System Integration (SII 2023)

February 2023

A Realistic Path Loss Model for Cell-Free Massive MIMO in Urban Environments

Thomas Choi(USC), Issei Kanno, Masaaki Ito, Wei-Yu Chen(USC), Andreas Molisch(USC)

IEEE Global Communications Conference 2022 (GLOBECOM 2022)

December 2022

RF chain-wise Clustering for Centralized mm-wave Cell-Free massive MIMO with Hybrid Beamforming

Shunsuke Kamiwatari, Issei Kanno, Takeo Ohseki, Kosuke Yamazaki, Yoji Kishi

IEEE Global Communications Conference 2022 (GLOBECOM 2022)

December 2022

Cylindrical Near-Field Scanning of Bistatic Radar Cross Section for Reflectarray With Two-Dimensional Reflection

Hiroshi Hashiguchi(National Defense Academy), Naobumi Michishita (National Defense Academy), Hisashi Morishita (National Defense Academy), Hiromi Matsuno, Takuya Ohto, Masayuki Nakano

The 2022 International Symposium on Antennas and Propagation (ISAP 2022)

October 2022

Experimental Investigation of the Reflection Characteristics of a Flat Lunar Surface

Feng Lu, Akira Yamaguchi, Kazunori Takeuchi, Hiroyuki Shinbo

The 10th Annual IEEE International Conference on Wireless for Space and Extreme Environments (WISEE 2022) 

October 2022

Virtualized terminal utilizing terahertz band radio waves for Beyond 5G : Timing Synchronization Scheme of Relay Device

Yoshio Kunisawa, Yoshiaki Amano, Takahiro Hayashi

2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)

September 2022

Practical Evaluation Method for Large IRS: RCS Pattern Synthesis of Sub-IRS with Mutual Coupling

Hiromi Matsuno, Takuya Ohto, Michihiro Harada, Tatsuya Nagao, Takahiro Hayashi

2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)

September 2022

Interference suppression for distributed CPU deployments in Cell-Free massive MIMO

Akio Ikami, Yu Tsukamoto, Naoki Aihara, Takahide Murakami, Hiroyuki Shinbo

2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)

September 2022

Joint AP On/Off and User-Centric Clustering for Energy Efficient Cell-Free Massive MIMO Systems

Masaaki Ito, Issei Kanno, Yoshiaki Amano, Yoji Kishi, Wei Yu Chen(USC), Thomas Choi(USC), Andreas F. Molisch(USC)

The 2022 IEEE 96th Vehicular Technology Conference (VTC-Fall 2022)

September 2022

A Study on Radio Propagation Characteristics at 100 GHz between the User Equipment and a Wearable Device

Kazuki Takezawa, Tatsuya Nagao, Takahiro Hayashi

2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)

September 2022

Fine-Tuning for Propagation Modeling of Different Frequencies with Few Data

Tatsuya Nagao, Takahiro Hayashi

2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)

September 2022

Learning-Based Path Loss Estimation Using Multiple Spatial Data and System Parameters

Kazuya Inoue(Yokohama National University), Keita Imaizumi (Yokohama National University), Koichi Ichige(Yokohama National University),Tatsuya Nagao, Takahiro Hayashi

2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)

September 2022

Blockage Prediction in an Outdoor mmWave Environment by Machine Learning Employing a Top View Image

Takahide Murakami, Keiji Yoshikawa, Akira Yamaguchi, Hiroyuki Shinbo

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE PIMRC 2022)

September 2022

A Study on Path Loss Modeling Using ResNet and Pre-Training With Free Space Path Loss

Tatsuya Nagao, Takahiro Hayashi

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE PIMRC 2022) Workshop

September 2022

Development of Intelligent Reflecting Surfaces for Mobile Communication Systems

Hiromi Matsuno, Takuya Ohto, Takahiro Hayashi

2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition

August 2022

A Study of Beam Scanning Scheme for IRS-Assisted 5G Millimeter-Wave Networks

Takuya Ohto, Hiromi Matsuno, Kazuki Takezawa, Tatsuya Nagao, Yoshiaki Amano

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI 2022)

July 2022

Dual Band and Dual Polarization Reflectarray Enabling Reflection to Two-dimensional Direction

Hiroshi Hashiguchi(National Defense Academy), Naobumi Michishita(National Defense Academy), Hisashi Morishita(National Defense Academy), Hiromi Matsuno, Takuya Ohto, Masayuki Nakano

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI 2022)

July 2022

A Method for Estimating User Equipment Orientation Using the Ratio of Received Power due to IRS Reflection Pattern Switching

Kazuki Takezawa, Hiromi Matsuno, Tatsuya Nagao, Takuya Ohto, Yoshiaki Amano

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI 2022)

July 2022

Angle Estimation of Wireless Devices Using Power Weighted Averaging Angle for Virtualized Terminal Using THz Band

Hiromi Matsuno, Tatsuya Nagao, Yoshiaki Amano

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI 2022)

July 2022

Fronthaul Load-Reduced Scalable Cell Free massive MIMO by Uplink Hybrid Signal Processing

Issei Kanno, Masaaki Ito, Takeo Ohseki, Kosuke Yamazaki, Yoji Kishi, Thomas Choi(USC), Wei Yu Chen(USC), Andreas F. Molisch(USC)

The 2022 IEEE 95th Vehicular Technology Conference (VTC2022-Spring)

June 2022

Adaptive Function Placement with Distributed Deep Reinforcement Learning in RAN Slicing

Yu Tsukamoto, Haruhisa Hirayama, Seung Il Moon, Hiroyuki Shinbo

The 2022 IEEE 95th Vehicular Technology Conference (VTC2022-Spring)

June 2022

Virtualized terminal utilizing terahertz band radio waves for Beyond 5G : Link budget analysis

Yoshio Kunisawa, Yoshiaki Amano

The 2022 IEEE 95th Vehicular Technology Conference (VTC2022-Spring)

June 2022

Reconfigurable Meta-surface Reflectors: Practical Phase Adjustment Method and Experimental Validation

Takuya Ohto, Hiromi Matsuno, Yoshiaki Amano, Mitsutaka Okita(Japan Display Inc.), Daiichi Suzuki(Japan Display Inc.), Kazuki Matsunaga(Japan Display Inc.), Shinichiro Oka(Japan Display Inc.)

The 2022 IEEE 95th Vehicular Technology Conference (VTC2022-Spring)

June 2022

Optimal User Load and Energy Efficiency in User-Centric Cell-Free Wireless Networks

Fabian Göttsch,(Technical University of Berlin), Noboru Osawa, Takeo Ohseki, Kosuke Yamazaki, Giuseppe Caire(Technical University of Berlin)

The 2022 IEEE 95th Vehicular Technology Conference (VTC2022-Spring)

June 2022

Development of a Direction-Variable Liquid Crystal Meta-surface Reflector

Hiromi Matsuno,Takuya Ohto,Yoshiaki Amano, Mitsutaka Okita(Japan Display Inc.), Daiichi Suzuki (Japan Display Inc.), Kazuki Matsunaga (Japan Display Inc.), Shinichiro Oka (Japan Display Inc.)

2022 IEEE International Conference on Communications (ICC 2022)

May 2022

Point Cloud Denoising Using Normal Vector-Based Graph Wavelet Shrinkage

Ryosuke Watanabe, Keisuke Nonaka, Haruhisa Kato, Eduardo Pavez(USC), Tatsuya Kobayashi, Antonio Ortega(USC)

2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

May 2022

Uplink-downlink duality and precoding strategies with partial csi in cell-free wireless networks

Fabian Göttsch(Technical University of Berlin), Noboru Osawa, Takeo Ohseki, Kosuke Yamazaki, Giuseppe Caire(Technical University of Berlin)

2022 IEEE Wireless Communications and Networking Conference (WCNC)

April 2022

Using a Drone Sounder to Measure Channels for Cell-Free Massive MIMO Systems

Thomas Choi(USC), Jorge Gomez-Ponce(USC), Colton Bullard(USC), Issei Kanno, Masaaki Ito, Takeo Ohseki, Kosuke Yamazaki, Andreas F. Molisch(USC)

2022 IEEE Wireless Communications and Networking Conference (WCNC)

April 2022

Geographical Clustering of Path Loss Modeling for Wireless Emulation in Various Environments

Tatsuya Nagao, Takahiro Hayashi

European Conference on Antennas and Propagation (EuCAP2022)

March 2022

Experimental Study of Loss and Variation of Human Blockage for Terahertz Wireless Communications

Keiji Yoshikawa, Takahiro Hayashi

16th European Conference on Antennas and Propagation (EuCAP2022)

March 2022

Study on safe operation architecture in semi-autonomous remote control system for mobile robots using mobile communications

Ko Matsuhiro, Hiroyuki Shinbo, Hiroyuki Ishii, Atsuo Takanishi

2022 IEEE/SICE International Symposium on System Integration (SII)

January 2022

Evaluation on Energy Efficiency of UE in UL Cell-Free Massive MIMO System With Power Control Methods

Masaaki Ito, Issei Kanno, Takeo Ohseki, Kosuke Yamazaki, Yoji Kishi, Thomas Choi (University of Southern California), Andreas Molisch (University of Southern California)

2021 IEEE Globecom Workshops (GC Wkshps)

December 2021

Proposal for a User-Centric Ran Architecture Towards Beyond 5G

Kosuke Yamazaki, Takeo Ohseki, Yoshiaki Amano, Hiroyuki Shinbo, Takahide Murakami, Yoji Kishi

2021 ITU Kaleidoscope: Connecting Physical and Virtual Worlds (ITU K)

December 2021

Uplink Energy Efficiency of Cell-Free Massive MIMO With Transmit Power Control in Measured Propagation Channels

Thomas Choi(University of Southern California), Masaaki Ito, Issei Kanno, Takeo Oseki, Kosuke Yamazaki, Andreas F. Molisch(University of Southern California)

2021 IEEE Workshop on Signal Processing Systems (SiPS)

October 2021

Power Control based Fair Coexistence of LBT-Free 5G New Radio Small Cells with WiGig Networks

Rony Kumer Saha

The 16th International Conference on Systems and Networks Communications (ICSNC 2021)

October 2021

Unlicensed Spectrum Bands for Cellular Mobile Networks-An Overview

Rony Kumer Saha

The 16th International Conference on Systems and Networks Communications (ICSNC 2021)

October 2021

On Operating Cellular Technologies in Unlicensed Spectrum Bands: A Review

Rony Kumer Saha

The 16th International Conference on Systems and Networks Communications (ICSNC 2021)

October 2021

The Impact of Subspace-Based Pilot Decontamination in User-Centric Scalable Cell-Free Wireless Networks

Fabian Göttsch(Technical University of Berlin), Noboru Osawa, Takeo Ohseki, Kosuke Yamazaki, Giuseppe Caire(Technical University of Berlin)

2021 IEEE 22nd International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

September 2021

A method for Forecasting Available Spectrum Resources with Location-Dependent Error Margin for Dynamic Spectrum Access

Tatsuya Nagao, Takahiro Hayashi, Yoshiaki Amano

2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall)

September 2021

Effect of antenna distribution on spectral and energy efficiency of cell-free massive MIMO

Masaaki Ito, Issei Kanno, Takeo Ohseki, Kosuke Yamazaki, Yoji Kishi, Thomas Choi(University of Southern California), Andreas F. Molisch(University of Southern California)

2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall)

September 2021

Data Traffic Offloading and Rate Control for Vehicles Using Radio Environment, Network Load and Route Planning

Takeo Ohseki, Kosuke Yamazaki, Daiki Maemoto(DENSO Corporation), Shigeki Kawai(DENSO Corporation), Tsuneo Nakata(DENSO Corporation), Akira Itou

2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

September 2021

On The Building Map for Radio Propagation Prediction Using Machine Learning

Kazuya Inoue(Yokohama National University), Koichi Ichige(Yokohama National University), Tatsuya Nagao, Takahiro Hayashi

2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

September 2021

R&D of technology for high reliability management in advanced 5G network to meet the various requirements of different communication services

Hiroyuki Shinbo, Takahide Murakami, Yu Tsukamoto, Yoji Kishi

2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)

August 2021

On Achieving High Capacity using Small Cells in Multistory Buildings: A Review

Rony Kumer Saha

The Seventeenth International Conference on Wireless and Mobile Communications (ICWMC 2021)

July 2021

On Operating 5G New Radio Indoor Small Cells in the 60 GHz Unlicensed Band

Rony Kumer Saha

The 17th International Conference on Wireless and Mobile Communications(ICWMC 2021)

July 2021

Dynamic and Opportunistic Millimeter-Wave Spectrum Access in 5G New Radio Multi-Operator Cognitive Radio Networks

Rony Kumer Saha

The 17th International Conference on Wireless and Mobile Communications(ICWMC 2021)

July 2021

Channel Estimation and Equalization for CP-OFDM-based OTFS in Fractional Doppler Channels

Noriyuki Hashimoto, Noboru Osawa, Kosuke Yamazaki, Shinsuke Ibi(Doshisha University)

2021 IEEE International Conference on Communications Workshops (ICC Workshops)

June 2021

Spectrum Reuse in the Terahertz Band for In-building Small Cell Networks

Rony Kumer Saha

The 20th International Conference on Networks (ICN 2021)

April 2021

Dynamic Spectrum Sharing in Multi-Operator Millimeter-Wave Indoor Systems

Rony Kumer Saha

The 20th International Conference on Networks (ICN 2021)

April 2021

Performance Analysis of In-building Small Cell Networks: Carrier Frequency Band Perspective

Rony Kumer Saha

The 20th International Conference on Networks (ICN 2021)

April 2021

Positioning for User Equipment of a mmWave System Using RSSI and Stereo Camera Images

Shoichiro Mihara, Satoshi Ito, Takahide Murakami, Hiroyuki Shinbo

2021 IEEE Wireless Communications and Networking Conference (WCNC)

March 2021

A Study on Urban Structure Map Extraction for Radio Propagation Prediction using XGBoost

Tatsuya Nagao, Takahiro Hayashi

The 15th European Conference on Antennas and Propagation (EuCAP 2021)

March 2021

Radio Propagation Prediction Using Neural Network and Building Occupancy Estimation

Kazuya Inoue (Yokohama National University), Koichi Ichige (Yokohama National University), Tatsuya Nagao, Takahiro Hayashi

2020 International Symposium on Antennas and Propagation (ISAP 2020)

January 2021

Dual Band and Dual Polarized Reflectarray Using Cross Dipole and Patch Elements

Nguyen Cong Oai(National Defense Academy), Naobumi Michishita(National Defense Academy), Hisashi Morishita(National Defense Academy), Hiromi Matsuno, Satoshi Ito, Takahiro Hayashi, Masayuki Nakano

2020 International Symposium on Antennas and Propagation (ISAP 2020)

January 2021

Experimental Investigation of Optically Transparent Dual-Polarized Reflectarray with Suppressed Sidelobe Level

Lin Wang(Nihon Dengyo Kosaku Co., Ltd.), Hiroki Hagiwara(Nihon Dengyo Kosaku Co., Ltd.), Yuko Rikuta(Nihon Dengyo Kosaku Co., Ltd.), Toshiyuki Kobayashi (Nihon Dengyo Kosaku Co., Ltd.), Hiromi Matsuno, Takahiro Hayashi, Satoshi Ito, Masayuki Nakano

2020 International Symposium on Antennas and Propagation (ISAP 2020)

January 2021

Direction and Location Estimation Algorithm with Power Gravity Point for Spectrum Sharing

Hiromi Matsuno, Yoshio Kunisawa, Takahiro Hayashi

2020 International Symposium on Antennas and Propagation (ISAP 2020)

January 2021

Base Station Selection Method for RAT-Dependent TDOA Positioning in Mobile Network

Naoto Tsumachi, Takeo Ohseki, Kosuke Yamazaki

2021 IEEE Radio and Wireless Week (RWW 2021)

January 2021

Reliable and Efficient Dissemination of Traffic Events Among Vehicles Associated with Different Operators by Using Cellular V2X

Yosuke Segawa(The University of Electro-Communications), Suhua Tang(The University of Electro-Communications), Takaaki Ueno, Tomohiko Ogishi, Sadao Obana(The University of Electro-Communications)

2020 IEEE Vehicular Networking Conference (VNC)

December 2020

Improvement of Response Time and Dielectric Loss in Thick Dendrimer/Liquid-Crystal Composites for Microwave-band Phase Control Applications

Yoichi Murakami(Tohoku University), Yosei Shibata(Tohoku University), Hiroyasu Sato(Tohoku University), Takahiro Ishinabe(Tohoku University), Hiromi Matsuno, Yoshiaki Amano, Qiang Chen(Tohoku University), Hideo Fujikake(Tohoku University)

The 27th International Display Workshops (IDW 2020)

December 2020

A Study on Forecasting of Available Spectrum Resources for Sharing using Envelope Extraction

Tatsuya Nagao, Takahiro Hayashi, Yoshiaki Amano

2020 IEEE Asia-Pacific Microwave Conference (APMC 2020)

December 2020

Ensemble Learning Method-Based Slice Admission Control for Adaptive RAN

Seung II Moon, Haruhisa Hirayama, Yu Tsukamoto, Shinobu Nanba, Hiroyuki Shinbo

2020 IEEE Global Communications Conference (GLOBECOM 2020) Workshops (GC Wkshps)

December 2020

Evaluation of Asynchronous Successive Interference Cancellation for 5G in Shared Spectrum with Different Radio System

Ryochi Kataoka, Issei Kanno, Toshinori Suzuki(Tohoku Gakuin University), Hiroyasu Ishikawa(Nihon University), Kosuke YAMZAKI, Yoji Kishi

2020 International Conference on Emerging Technologies for Communications (ICETC 2020)

December 2020

Modeling interference to reuse millimeter-wave spectrum to in-building small cells toward 6G

Rony Kumer Saha

2020 IEEE 92nd Vehicular Technology Conference (VTC2020-Fall)

November 2020

A dynamic exclusive-use spectrum access method for millimeter-wave mobile systems toward 6G

Rony Kumer Saha

The 92nd Vehicular Technology Conference (VTC2020-Fall)

November 2020

Interweave shared-use model for dynamic spectrum access in millimeter-wave mobile systems for 6G

Rony Kumer Saha

The 92nd Vehicular Technology Conference (VTC2020-Fall)

November 2020

A countrywide licensed full spectrum allocation method for millimeter-wave mobile systems for 6G

Rony Kumer Saha

The 92nd Vehicular Technology Conference (VTC2020-Fall)

November 2020

A Theoretical framework toward realizing spectral and energy efficiencies of 6G mobile networks

Rony Kumer Saha

The 92nd Vehicular Technology Conference (VTC2020-Fall)

November 2020

Asynchronous Successive Interference Cancellation for 5G Receiver Operateing in Shared Spectrum with Different Radio System

Issei Kanno, Ryochi Kataoka, Toshinori Suzuki(Tohoku Gakuin University), Hiroyasu Ishikawa(Nihon University), Kosuke Yamzaki, Yoji Kishi

The 54th Asilomar Conference on Signals, Systems and Computers (Asilomar 2020)

November 2020

Underlay Cognitive Radio Millimeter-Wave Spectrum Access for In-Building Dense Small Cells in Multi-Operator Environments Toward 6G

Rony Kumer Saha

The 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC 2020)

October 2020

A Flexible Licensed Spectrum Allocation Technique for Millimeter-Wave Mobile Systems Toward 6G

Rony Kumer Saha

The 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC 2020)

October 2020

On Application and Evaluation of Millimeter-Wave Spectrum Sharing, Trading and Reusing for Small Cells Toward Spectral and Energy Efficiencies of 6G

Rony Kumer Saha

The 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC 2020)

October 2020

Radio Quality Estimation on Drone Flight Sites for High Reliable Operation

Nobuo Suzuki(ATR), Hiromi Matsuno, Tatsuya Yoshioka(ATR), Toshinori Suzuki (Tohoku Gakuin University)

The 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC 2020)

October 2020

Fair Spectrum Allocation for Dynamic Spectrum Sharing between Different Radio Systems

Akio Ikami, Takahiro Hayashi, Yoshiaki Amano

The 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC 2020)

October 2020

Location Estimation Algorithm for Multiple Wave Sources Using Power Gravity Points

Hiromi Matsuno, Yoshio Kunisawa, Takahiro Hayashi

The 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC 2020)

October 2020

A New Paradigm for Spectrum Allocation in Millimeter-Wave Systems

Rony Kumer Saha

The 15th International Conference on Systems and Networks Communications (ICSNC 2020)

October 2020

On Evaluating Spectrum Allocation Techniques in Millimeter-Wave Systems using Indoor Smalls for 5G/6G

Rony Kumer Saha

The 15th International Conference on Systems and Networks Communications (ICSNC 2020)

October 2020

Hybrid Interweave-Underlay Millimeter-Wave Spectrum Access in Multi-Operator Cognitive Radio Networks Toward 6G

Rony Kumer Saha

The 15th International Conference on Systems and Networks Communications (ICSNC 2020)

October 2020

A Massive Millimeter-Wave Spectrum Allocation and Exploitation Technique Toward 6G Mobile Networks

Rony Kumer Saha

The 15th International Conference on Systems and Networks Communications (ICSNC 2020)

October 2020

Detection and Location Estimation of Transmitter Using the Gradient of the Power Gravity Point for Dynamic Spectrum Sharing

Hiromi Matsuno, Yoshio Kunisawa, Takahiro Hayashi

2020 International Conference on Wireless Communications Signal Processing and Networking (WiSPNET 2020)

June 2020

A study on the variety and size of input data for radio propagation prediction using a deep neural network

Takahiro Hayashi, Tatsuya Nagao, Satoshi Ito

The 14th European Conference on Antennas and Propagation (EuCAP 2020)

March 2020

Study on radio propagation prediction by machine learning using urban structure maps

Tatsuya Nagao, Takahiro Hayashi

The 14th European Conference on Antennas and Propagation (EuCAP 2020)

March 2020

Fast and Reliable Dissemination of Road and Traffic Information by Combining Cellular V2X and DSRC

Masashi Takakusaki (The University of Electro-Communications), Suhua Tang (The University of Electro-Communications), Takaaki Ueno, Tomohiko Ogishi, Sadao Obana (The University of Electro-Communications)

2019 IEEE Global Communications Conference (GLOBECOM) Workshops (GC Wkshps)

December 2019

Nationwide spectrum sharing of mobile network operators with indoor small cells

Rony Kumer Saha

2019 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN 2019)

November 2019

Exploiting in-building small cell architecture for realizing dynamic spectrum sharing techniques

Rony Kumer Saha

2019 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN 2019)

November 2019

Co-primary licensed spectrum sharing techniques for in-building small cells in 5G era

Rony Kumer Saha

2019 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN 2019)

November 2019

A technique for massive spectrum sharing with ultra-dense in-building small cells in 5G era

Rony Kumer Saha

The 90th Vehicular Technology Conference (VTC2019-Fall)

September 2019

Multi-band spectrum sharing with indoor small cells in hybrid satellite-mobile systems

Rony Kumer Saha

The 90th Vehicular Technology Conference (VTC2019-Fall)

September 2019

Diversity-multiplexing tradeoff of the two-user X-channel with two antennas

Young-bin Kim, Myung Gil Kang, Wan Choi

The 53rd IEEE International Conference on Communications (ICC 2019)

July 2019

Hierarchical and Distributed Software-Defined Network to Reduce Control Load

Tetsuro Ueda, Akira Idoue, Eiji Utsunomiya

2019 IEEE Wireless Communications and Networking Conference (WCNC)

April 2019

Backhaul Bandwidth Consideration for Workload Placement in Hierarchical Edge Cloud Architecture

Katsuo Yunoki, Hiroyuki Shinbo

2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)

April 2019

Sidelink Grouping Method for Multicasting D2D Signaling Messages with Considerations of Sidelink Transmission Power

Ryochi Kataoka, Akira Yamaguchi, Hiroyuki Shinbo

2019 IEEE 4th International Conference on Computer and Communication Systems (ICCCS)

February 2019

Topographic Allocations of MmWave Access Points inside the Passenger Car of High Speed Trains

Feng Lu, Akira Yamaguchi, Kazunori Takeuchi, Hiroyuki Shinbo

2018 4th International Conference on Systems, Control and Communications (ICSCC)

December 2018

Novel M-CORD based Multi-functional Split Enabled Virtualized Cloud RAN Testbed with Ideal Fronthaul

Rony Kumer Saha, Yu Tsukamoto, Shinobu Nanba, Kosuke Nishimura, Kosuke Yamazaki

2018 IEEE Globecom Workshops (GC Wkshps)

December 2018

Flying Base-station for a Temporary Mobile Communication Area at a Disaster

Hiroyuki Shinbo, Yoshio Kunisawa, Takuro Sakai, Yoshinori Kitatsuji, Akira Endo(KDDI), Kazuya Tanaka(KDDI)

2018 5th International Conference on Information and Communication Technologies for Disaster Management (ICT-DM)

December 2018

Carry-on State Service Handover between Edge Hosts for Latency Strict Applications in Mobile Networks

Katsuo Yunoki, Hiroyuki Shinbo

2018 21st International Symposium on Wireless Personal Multimedia Communications (WPMC)

November 2018

RAN Architectural Evolution Framework toward 5G and Beyond Cellular-An Overview

Rony Kumer Saha, Shinobu Nanba, Kosuke Nishimura, Young-bin Kim, Kosuke Yamazaki

2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

September 2018

Adaptive Successive Transmission in Virtual Full-Duplex Cooperative NOMA

Young-bin Kim, Kosuke Yamazaki, Bang Chul Jung(Chungnam National University)

IEEE Wireless Communications and Networking Conference 2018 (WCNC 2018)

April 2018

Reduction Scheme of SS for D2D Relay-Path Selection to Achieve Guaranteed Throughput for 5G systems

Bingxuan Zhao, Koichiro Kitagawa, Takashi Fujimoto, Katsuo Yunoki, Ryochi Kataoka, Hiroyuki Shinbo

The 15th International Conference on Wireless and Optical Communications Networks (WOCN 2018)

February 2018