| 2025 | VTC | Resource Allocation Based on Relation Information of Hidden Node for Minimizing Packet Error in LPWA. | Keita Aoki, Osamu Takyu, Koichi Adachi, Mai Ohta, Takeo Fujii |
| 2024 | PIMRC | Indoor Radio Environment Map Construction using Node Position Estimation for Smart Factories. | Hayato Mukasa, Kohei Yuzawa, Takeo Fujii, Koichi Adachi |
| 2024 | VTC | 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 |
| 2024 | VTC | FSF-LoRa: Fractional-Spreading-Factor-LoRa for Flexible Resource Allocation. | Ryoya Saito, Koichi Adachi |
| 2024 | VTC | Received Signal Aided Implicit Node Clustering in LPWAN. | Takahiro Saraya, Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Takeo Fujii, Mai Ohta |
| 2023 | WCNC | Resource Allocation for Periodic Traffic in Wireless Sensor Network. | Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii |
| 2021 | VTC | Channel Allocation for LoRaWanConsidering Intra-System and Inter-System Interferences. | Shinichiro Kakuda, Yudai Yamazaki, Keita Katagiri, Takeo Fujii, Osamu Takyu, Mai Ohta, Koichi Adachi |
| 2021 | WCNC | Transmission Timing Control Using ACK Signal in LoRaWAN. | Muying Chen, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii |
| 2018 | VTC | Measurement Experiments on 920 MHz Band for Spectrum Sharing with LoRaWAN. | Mai Ohta, Koichi Adachi, Naoki Aihara, Osamu Takyu, Takeo Fujii, Makoto Taromaru |
| 2017 | GLOBECOM | Cooperative Transmission Strategy over Users' Mobility for Downlink Distributed Antenna Systems. | Ashim Khadka, Koichi Adachi, Sumei Sun, Junyuan Wang, Huiling Zhu, Jiangzhou Wang |
| 2017 | GLOBECOM | Hybrid Group Paging for Massive Machine-Type Communications in LTE Networks. | Ernest Kurniawan, Peng Hui Tan, Koichi Adachi, Sumei Sun |
| 2016 | VTC | Q-Learning Based Intelligent Traffic Steering in Heterogeneous Network. | Koichi Adachi, Maodong Li, Peng Hui Tan, Yuan Zhou, Sumei Sun |
| 2015 | APCC | Heterogeneous network: An evolutionary path to 5G. | Sumei Sun, Koichi Adachi, Peng Hui Tan, Yuan Zhou, Jingon Joung, Chin Keong Ho |
| 2015 | GLOBECOM | Cooperative Transmission Strategy for Downlink Distributed Antenna Systems over Time-Varying Channel. | Ashim Khadka, Koichi Adachi, Sumei Sun, Huiling Zhu, Jiangzhou Wang |
| 2013 | WCNC | Cell selection for TDD two-tier cellular networks based on uplink-downlink capacity. | Poramate Tarasak, Koichi Adachi, Sumei Sun |
| 2012 | GLOBECOM | Energy-saving coordinated napping (CoNap) for wireless networks. | Koichi Adachi, Jingon Joung, Sumei Sun, Peng Hui Tan |
| 2012 | IWCMC | Recursive QR packet combining for uplink single-carrier multi-user MIMO HARQ using near ML detection. | Tetsuya Yamamoto, Koichi Adachi, Sumei Sun, Fumiyuki Adachi |
| 2012 | PIMRC | Power-efficient dynamic BS muting in clustered cellular system. | Koichi Adachi, Sumei Sun |
| 2012 | VTC | Inter-Sector Cooperative Relaying for Network Power Minimization. | Koichi Adachi, Sumei Sun |
| 2011 | GLOBECOM | Transmit and Receive Weights in Vector Coding with Channel Estimation Error and Feedback Delay. | Kyohei Takano, Koichi Adachi, Tomoaki Ohtsuki |
| 2011 | VTC | Power Minimization of Cooperative Relay Transmission with Relay's Private Information. | Koichi Adachi, Sumei Sun, Chin Keong Ho |
| 2011 | VTC | Cooperative Relay Transmission with Relay's Private Information. | Koichi Adachi, Sumei Sun, Jingon Joung |
| 2011 | VTC | Frequency Band Allocation in MIMO System Based on Received Power Difference among Users. | Hironori Kizuka, Koichi Adachi, Tomoaki Ohtsuki |
| 2011 | VTC | Single-Carrier Incremental Relaying with Joint Tx/Rx FDE. | Kazuki Takeda, Koichi Adachi, Sumei Sun, Fumiyuki Adachi |
| 2011 | VTC | Phase Rotation Sequence Selection Method for IFDMA with DDCE. | Kazunori Yamamoto, Koichi Adachi, Tomoaki Ohtsuki |
| 2010 | VTC | Impact of Frequency Diversity and Multi-User Diversity in IFDMA. | Yuichi Kazama, Akira Yamasaki, Koichi Adachi, Masao Nakagawa |
| 2010 | WCNC | Iterative Interference Cancellation for Multi-Code PR/MC-CDMA. | Koichi Adachi, Masao Nakagawa |
| 2009 | VTC | Virtual MIMO Space Division Multiplexing for MC-CDMA. | Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa |
| 2009 | WCNC | On the construction of orthogonal spreading code groups for MC-CDMA with FDE in a frequency selective channel. | Koichi Adachi, Masao Nakagawa |
| 2008 | VTC | Cellular MIMO Channel Capacities of MC-CDMA and OFDM. | Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa |
| 2008 | WCNC | Bit-Wise Error Detection Based Iterative Signal Detection for OFDM MIMO Multiplexing. | Koichi Adachi, Masao Nakagawa |
| 2007 | VTC | On Cellular MIMO Spectrum Efficiency. | Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa |
| 2006 | VTC | LDPC Coded Iterative Signal Detection Based on QRD-M with CRC Check. | Koichi Adachi, Masao Nakagawa |
| 2006 | VTC | Iterative Modified QRM-MLD Based on CRC Check for OFDM MIMO Multiplexing. | Koichi Adachi, Masao Nakagawa |