Relay method of sending soft decided symbol in cooperative communication. - Yuki Fukuyama; Osamu Takyu; Koichi Adachi; Masao Nakagawa (Communication Systems and Networks, 2006)

LDPC Coded Iterative Signal Detection Based on QRD-M with CRC Check. - Koichi Adachi; Masao Nakagawa (VTC Fall, 2006)

Iterative Modified QRM-MLD Based on CRC Check for OFDM MIMO Multiplexing. - Koichi Adachi; Masao Nakagawa (VTC Spring, 2006)

Iterative QRM-MLD with Pilot-Assisted Decision Directed Channel Estimation for OFDM MIMO Multiplexing. - Koichi Adachi; Riaz Esmailzadeh; Masao Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

On Cellular MIMO Spectrum Efficiency. - Koichi Adachi; Fumiyuki Adachi; Masao Nakagawa (VTC Fall, 2007)

Iterative Modified QRD-M Based on CRC Codes for OFDM MIMO Multiplexing. - Koichi Adachi; Masao Nakagawa (IEICE Trans. Commun., 2007)

Theoretical Analysis of Decision Directed Block Iterative Channel Estimation for OFDM Mobile Radio. - Koichi Adachi; Masao Nakagawa (IEICE Trans. Commun., 2007)

Relay Method of Sending Soft Decision Symbol Based on the Result of Error Detecting Code in Cooperative Communication. - Yuki Fukuyama; Osamu Takyu; Koichi Adachi; Masao Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Cellular MIMO Channel Capacities of MC-CDMA and OFDM. - Koichi Adachi; Fumiyuki Adachi; Masao Nakagawa (VTC Spring, 2008)

Bit-Wise Error Detection Based Iterative Signal Detection for OFDM MIMO Multiplexing. - Koichi Adachi; Masao Nakagawa (WCNC, 2008)

On Cellular MIMO Channel Capacity. - Koichi Adachi; Fumiyuki Adachi; Masao Nakagawa (IEICE Trans. Commun., 2008)

Phase Rotation/MC-CDMA for Uplink Transmission. - Koichi Adachi; Masao Nakagawa (MCSS, 2009)

Virtual MIMO Space Division Multiplexing for MC-CDMA. - Koichi Adachi; Fumiyuki Adachi; Masao Nakagawa (VTC Fall, 2009)

Channel Capacity of MC-CDMA and Impact of Residual ICI. - Koichi Adachi; Fumiyuki Adachi; Masao Nakagawa (IEICE Trans. Commun., 2009)

Impact of Frequency Diversity and Multi-User Diversity in IFDMA. - Yuichi Kazama; Akira Yamasaki; Koichi Adachi; Masao Nakagawa (VTC Spring, 2010)

Iterative Interference Cancellation for Multi-Code PR/MC-CDMA. - Koichi Adachi; Masao Nakagawa (WCNC, 2010)

On the Construction of Orthogonal Spreading Code Groups for MC-CDMA with FDE in a Frequency Selective Channel. - Koichi Adachi; Masao Nakagawa (IEICE Trans. Commun., 2010)

Phase Rotation for Constructing Uniform Frequency Spectrum in IFDMA Communication. - Takeo Yamasaki; Osamu Takyu; Koichi Adachi; Yohtaro Umeda; Masao Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010)

Transmit and Receive Weights in Vector Coding with Channel Estimation Error and Feedback Delay. - Kyohei Takano; Koichi Adachi; Tomoaki Ohtsuki (GLOBECOM, 2011)

Cooperative Relay Transmission with Relay's Private Information. - Koichi Adachi; Sumei Sun; Jingon Joung (VTC Spring, 2011)

Frequency Band Allocation in MIMO System Based on Received Power Difference among Users. - Hironori Kizuka; Koichi Adachi; Tomoaki Ohtsuki (VTC Spring, 2011)

Single-Carrier Incremental Relaying with Joint Tx/Rx FDE. - Kazuki Takeda; Koichi Adachi; Sumei Sun; Fumiyuki Adachi (VTC Fall, 2011)

Phase Rotation Sequence Selection Method for IFDMA with DDCE. - Kazunori Yamamoto; Koichi Adachi; Tomoaki Ohtsuki (VTC Spring, 2011)

Subcarrier Mapping for Single-User SC-FDMA Relay Communications. - Yu Hemmi; Koichi Adachi; Tomoaki Ohtsuki (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

An Autonomous Selective Cooperative ARQ Protocol for Hybrid Mobile Wireless Sensor Networks. - Nandar Lynn; Osamu Takyu; Koichi Adachi; Masao Nakagawa; Tomoaki Ohtsuki (J. Commun., 2011)

Energy-saving coordinated napping (CoNap) for wireless networks. - Koichi Adachi; Jingon Joung; Sumei Sun; Peng Hui Tan (GLOBECOM Workshops, 2012)

Power-efficient dynamic BS muting in clustered cellular system. - Koichi Adachi; Sumei Sun (PIMRC, 2012)

Inter-Sector Cooperative Relaying for Network Power Minimization. - Koichi Adachi; Sumei Sun (VTC Spring, 2012)

Power Minimization of Cooperative Relay Transmission with Relay's Private Information. - Koichi Adachi; Sumei Sun; Chin Keong Ho (IEEE Trans. Wirel. Commun., 2012)

Recursive QR packet combining for uplink single-carrier multi-user MIMO HARQ using near ML detection. - Tetsuya Yamamoto; Koichi Adachi; Sumei Sun; Fumiyuki Adachi (Wirel. Commun. Mob. Comput., 2012)

Cell selection for TDD two-tier cellular networks based on uplink-downlink capacity. - Poramate Tarasak; Koichi Adachi; Sumei Sun (WCNC, 2013)

Joint Cooperative-Transmit and Receive FDE for Single-Carrier Incremental Relaying. - Koichi Adachi; Kazuki Takeda; Sumei Sun; Fumiyuki Adachi (IEEE Trans. Veh. Technol., 2013)

Adaptive Coordinated Napping (CoNap) for Energy Saving in Wireless Networks. - Koichi Adachi; Jingon Joung; Sumei Sun; Peng Hui Tan (IEEE Trans. Wirel. Commun., 2013)

Heterogeneous network: An evolutionary path to 5G. - Sumei Sun; Koichi Adachi; Peng Hui Tan; Yuan Zhou; Jingon Joung; Chin Keong Ho (APCC, 2015)

Cooperative Transmission Strategy for Downlink Distributed Antenna Systems over Time-Varying Channel. - Ashim Khadka; Koichi Adachi; Sumei Sun; Huiling Zhu; Jiangzhou Wang (GLOBECOM, 2015)

AP based traffic steering for LTE-Wi-Fi networks. - Sumei Sun; Peng Hui Tan; Yuan Zhou; Koichi Adachi; Maodong Li (ICCC, 2015)

Global Communications Newsletter. - Koichi Adachi (IEEE Commun. Mag., 2015)

A Survey on Power-Amplifier-Centric Techniques for Spectrum- and Energy-Efficient Wireless Communications. - Jingon Joung; Chin Keong Ho; Koichi Adachi; Sumei Sun (IEEE Commun. Surv. Tutorials, 2015)

A Distributed Resource Reservation Scheme for Handover Failure Reduction. - Koichi Adachi; Jingon Joung; Yuan Zhou; Sumei Sun (IEEE Wirel. Commun. Lett., 2015)

Q-Learning Based Intelligent Traffic Steering in Heterogeneous Network. - Koichi Adachi; Maodong Li; Peng Hui Tan; Yuan Zhou; Sumei Sun (VTC Spring, 2016)

Cooperative Transmission Strategy over Users' Mobility for Downlink Distributed Antenna Systems. - Ashim Khadka; Koichi Adachi; Sumei Sun; Junyuan Wang 001; Huiling Zhu; Jiangzhou Wang (GLOBECOM, 2017)

Hybrid Group Paging for Massive Machine-Type Communications in LTE Networks. - Ernest Kurniawan; Peng Hui Tan; Koichi Adachi; Sumei Sun (GLOBECOM, 2017)

Orthogonal Resource Allocation Using SVM for CSMA/CA. - Naoki Aihara; Koichi Adachi (APSIPA, 2018)

Experimental Evaluation of Interference Robustness for Frequency Spectrum Sharing in WLAN Systems. - Hironori Godo; Osamu Takyu; Koichi Adachi; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa (APSIPA, 2018)

Throughput Analysis of Dynamic Multi-Hop Network Under High Traffic Load. - Yusuke Sunada; Koichi Adachi; Yasushi Yamao (ICUFN, 2018)

Measurement Experiments on 920 MHz Band for Spectrum Sharing with LoRaWAN. - Mai Ohta; Koichi Adachi; Naoki Aihara; Osamu Takyu; Takeo Fujii; Makoto Taromaru (VTC Fall, 2018)

Packet relay-assisted V2V communication with sectorised relay station employing payload combining scheme. - Le Tien Trien; Koichi Adachi; Yasushi Yamao (IET Commun., 2018)

Efficient CSMA/CA Packet Relay-Assisted Scheme with Payload Combining for ITS V2V Communication. - Le Tien Trien; Koichi Adachi; Yasushi Yamao (J. Inf. Process., 2018)

NOMA Based UAV Relay Communication Protocol in Cellular Network. - Jumpei Kawakami; Hendrik Lumbantoruan; Koichi Adachi (APSIPA, 2019)

Array Antenna for Power Saving of Sensor Nodes in UAV-BS enabled WSN. - Hendrik Lumbantoruan; Koichi Adachi (ICNC, 2019)

Proactive Cache System Using Cellular-Radio Information on MEC. - Miho Tanaka; Kenichi Nagasue; Jun Ogawa; Akira Yokomichi; Yoshihiro Ando; Takayuki Ojima; Toshiyuki Shizuoka; Koichi Adachi; Takeo Fujii (ICUFN, 2019)

Spectrum Sharing Exploiting Spectrum Database for LPWA. - Yudai Yamazaki; Takeo Fujii; Osamu Takyu; Mai Ohta; Koichi Adachi (ICUFN, 2019)

Q-Learning Aided Resource Allocation and Environment Recognition in LoRaWAN With CSMA/CA. - Naoki Aihara; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Access, 2019)

Radio and Computing Resource Allocation for Minimizing Total Processing Completion Time in Mobile Edge Computing. - Ryuji Kobayashi; Koichi Adachi (IEEE Access, 2019)

Autonomous Decentralized Transmission Timing Control in Wireless Sensor Network. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (APSIPA, 2020)

Probabilistic Binary Offloading for Wireless Powered Mobile Edge Computing System. - Takuya Kobayashi; Koichi Adachi (APSIPA, 2020)

Estimation of Desired power and Undesired power Using Chirp Demodulation and Evaluation of Accuracy. - Gaku Kobayashi; Osamu Takyu; Koichi Adachi; Mai Ohta; Takeo Fujii (APSIPA, 2020)

Spectrum Database Aided Prior Vacant Frequency Band Detection for Spectrum Sharing. - Miho Musashi; Koichi Adachi (ICAIIC, 2020)

Trajectory and Communication Protocol for Efficient Data Collecting in UAV-Enabled WSN. - Hendrik Lumbantoruan; Koichi Adachi (ICOIN, 2020)

Base Station Operation Based on Affinity Propagation in Cellular Networks. - Kazunari Takahashi; Koichi Adachi (ICOIN, 2020)

Autonomous Decentralized Frequency Resource Allocation using ACK Signal in LoRaWAN. - Kosuke Suzuki; Naoki Aihara; Koichi Adachi; Satoshi Yamazaki (WPMC, 2020)

Offloading Selection with Unequal Timeslot in Mobile Edge Computing. - Naotaka Hirayama; Takuya Kobayashi; Koichi Adachi (APSIPA ASC, 2021)

DCT Compression Scheme for Wireless Sensor Information considering Spatial Correlation. - Kohei Natsume; Mai Ohta; Koichi Adachi; Osamu Takyu; Takeo Fujii (ICOIN, 2021)

Proposal of interference power occupancy estimation method using chirp demodulation. - Gaku Kobayashi; Osamu Takyu; Koichi Adachi; Mai Ohta; Takeo Fujii (ICUFN, 2021)

Channel Allocation for LoRaWanConsidering Intra-System and Inter-System Interferences. - Shinichiro Kakuda; Yudai Yamazaki; Keita Katagiri; Takeo Fujii; Osamu Takyu; Mai Ohta; Koichi Adachi (VTC Fall, 2021)

Transmission Timing Control Using ACK Signal in LoRaWAN. - Muying Chen; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (WCNC, 2021)

Packet-Level Index Modulation for LoRaWAN. - Koichi Adachi; Kohei Tsurumi; Aoto Kaburaki; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Access, 2021)

Autonomous Decentralized Traffic Control Using Q-Learning in LPWAN. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Access, 2021)

Achievable Rate Enhancement Based on Multi-Packet Indexing in Packet-Level Index Modulation. - Riku Yamabe; Mikihiko Nishiara; Osamu Takyu; Koichi Adachi (IEEE Access, 2021)

Array antenna equipped UAV-BS for efficient low power WSN and its theoretical analysis. - Hendrik Lumbantoruan; Koichi Adachi (IET Commun., 2021)

Space-Frequency-Interpolated Radio Map. - Koya Sato; Katsuya Suto; Kei Inage; Koichi Adachi; Takeo Fujii (IEEE Trans. Veh. Technol., 2021)

Image-Driven Spatial Interpolation With Deep Learning for Radio Map Construction. - Katsuya Suto; Shinsuke Bannai; Koya Sato; Kei Inage; Koichi Adachi; Takeo Fujii (IEEE Wirel. Commun. Lett., 2021)

High-Sensitivity Detection Method for Signals in PhyC-SN. - Toshi Ito; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (ICUFN, 2022)

Performance Evaluation of Highly Efficient Information Collection Methods by Trend Analysis of Sensor Information Using Pre-learning. - Ryuji Miyamoto; Osamu Takyu; Hiroshi Fujiwara; Koichi Adachi; Mai Ohta; Takeo Fujii (ICUFN, 2022)

Simple Clock Drift Estimation and Compensation for Packet-Level Index Modulation and Its Implementation in LoRaWAN. - Kohei Tsurumi; Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Internet Things J., 2022)

Aiming in Harsh Environments: A New Framework for Flexible and Adaptive Resource Management. - Jiaqi Zou; Rui Liu; Chenwei Wang 001; Yuanhao Cui; Zixuan Zou; Songlin Sun; Koichi Adachi (IEEE Netw., 2022)

Estimation Based on Chirp Modulation for Desired and Interference Power and Channel Occupancy Ratio in LoRa. - Osamu Takyu; Gaku Kobayashi; Koichi Adachi; Mai Ohta; Takeo Fujii (Sensors, 2022)

Flexible Index Mapping Scheme for Packet-Level Index Modulation. - Kosuke Suzuki; Koichi Adachi; Mai Ohta; Osamu Takyu; Takeo Fujii (IEEE Wirel. Commun. Lett., 2022)

Dynamic Path Planning for QoS Improvement in Multiple Automated Guided Vehicles. - Takumi Tanagi; Koichi Adachi (APWCS, 2023)

Resource Allocation for Periodic Traffic in Wireless Sensor Network. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (WCNC, 2023)

Packet-Level Index Modulation Under Duty Cycle Constraints. - Ryogo Oya; Shinichiro Kakuda; Takeo Fujii; Osamu Takyu; Mai Ohta; Koichi Adachi (WPMC, 2023)

Position Estimation of Radio Source Based on Fingerprinting With Physical Wireless Parameter Conversion Sensor Networks. - Masafumi Oda; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (IEEE Access, 2023)

Three Level Recognition Based on the Average of the Phase Differences in Physical Wireless Parameter Conversion Sensor Networks and Its Effect to Localization with RSSI. - Toshi Ito; Masafumi Oda; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (Sensors, 2023)

Interference Cancelation for Coexistence of LoRaWAN With Wireless Power Transfer. - Ryota Kumada; Koichi Adachi (IEEE Internet Things J., 2023)

Data Gathering Method with High Accuracy of Environment Recognition Using Mathematical Optimization in Packet-Level Index Modulation. - Ryuji Miyamoto; Osamu Takyu; Hiroshi Fujiwara; Koichi Adachi; Mai Ohta; Takeo Fujii (IEICE Trans. Commun., 2023)

Collection of Correlated Information from Superimposed Multiple Chirp Signals. - Koki Aoyama; Koichi Adachi (APSIPA, 2024)

Radio Resource Allocation Scheme Considering Future Channel Conditions Based on Radio Environment Map. - Kotaro Yoshikawa; Takumi Tanagi; Koichi Adachi (APWCS, 2024)

Characterization of Discrimination of Number of Signal Collision Sensors Using Spectral Fluctuation Caused by Frequency Offset in Physical Wireless Parameter Conversion Sensor Networks. - Toshi Ito; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (ICAIIC, 2024)

LBT-Based Resource Allocation Methods Utilizing Periodicity of Traffic in LPWAN. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (ICNC, 2024)

Energy-Efficient Multi-Hop LoRaWAN with Transmission and Synchronization Control. - Hiroto Shida; Aoto Kaburaki; Koichi Adachi (ICNC, 2024)

Indoor Wireless Environment Visualization for Smart Factories. - Hayato Mukasa; Koshiro Aruga; Takeo Fujii; Koichi Adachi (ICOIN, 2024)

Indoor Radio Environment Map Construction using Node Position Estimation for Smart Factories. - Hayato Mukasa; Kohei Yuzawa; Takeo Fujii; Koichi Adachi (PIMRC, 2024)

Novel Environmental Recognition Scheme with Mobile Data Gathering Station in Physical Wireless Parameter Conversion Sensor Networks. - Toshi Ito; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (VTC Fall, 2024)

FSF-LoRa: Fractional-Spreading-Factor-LoRa for Flexible Resource Allocation. - Ryoya Saito; Koichi Adachi (VTC Fall, 2024)

Received Signal Aided Implicit Node Clustering in LPWAN. - Takahiro Saraya; Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Takeo Fujii; Mai Ohta (VTC Spring, 2024)

Transmission Timing and Synchronization Control for Energy-Efficient Multi-Hop LoRaWAN. - Hiroto Shida; Aoto Kaburaki; Koichi Adachi (IEEE Access, 2024)

An Environment-Aware Adaptive Data-Gathering Method for Packet-Level Index Modulation in LPWA. - Osamu Takyu; Keita Takeda; Ryuji Miyamoto; Koichi Adachi; Mai Ohta; Takeo Fujii (Sensors, 2024)

Adaptive Resource Allocation Utilizing Periodic Traffic and Clock Drift in LPWAN. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Trans. Wirel. Commun., 2024)

Packet-Level Index Modulation Based on Channel Activity Detection. - Kosuke Suzuki; Koichi Adachi; Mai Ohta; Osamu Takyu; Takeo Fujii (IEEE Trans. Wirel. Commun., 2024)

Differential Space-Time Line Codes. - Jingon Joung; Koichi Adachi; Chau Yuen (IEEE Trans. Veh. Technol., 2024)

Direction of Arrival Estimation Through Joint Phase-Time Arrays. - Kyohei Ueda; Koichi Adachi (ICOIN, 2025)

Channel Phase Nonreciprocity Compensation for Space-Frequency Line Coded OFDM Systems. - Han-Gyeol Lee; Jihoon Choi; Juyeop Kim; Koichi Adachi; Yue Xiao 001; Jingon Joung (IEEE Access, 2025)

Tackling Hidden Node Problem Utilizing Traffic Periodicity and Downlink Carrier Sense in LPWAN. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu (IEEE Internet Things J., 2025)