Conference (full paper, peer-reviewed)

1. ReFDrone: One-Shot Indoor Drone 4DoF Estimation via Rolling-Shutter AoA from Floor-Reflected Light.
   Yusei Onishi, Hiroaki Murakami, Masanari Nakamura, Hiromichi Hashizume, Masanori Sugimoto
   Proceedings of the 24th IEEE International Conference on Pervasive Computing and Communications (PerCom'26), March 2026.  (Acceptance rate: 15.62 %)

2. Acquisition and visualization of HVAC data by autonomous mobile robots.
   Changyo Han, Cedric Caremel, Keiichiro Taniguchi, Hiroaki Murakami, Katsuya Koike, Koki Higashioka, Toshihisa Toshima, Yasunori Akashi, Yoshihiro Kawahara
   Proceedings of the 30th International Conference of the Association for Computer-Aided Architectural Design Research in Asia (CAADRIA'25), March 2025.  (Acceptance rate: 26.3 %)

3. SyncEcho: Echo-Based Single Speaker Time Offset Estimation for Time-of-Flight Localization.
   Hiroaki Murakami, Takuya Sasatani, Masanori Sugimoto, Issey Sukeda, Yukiya Mita, Yoshihiro Kawahara
   Proceedings of the 22nd ACM Conference on Embedded Networked Sensor Systems (SenSys'24), November 2024. (Acceptance rate: 18.5 %)

4. Exploring the Capabilities of Large Language Models in Seat Recommendation Systems for Hot-Desking Offices.
   Hiroaki Murakami, Keiichiro Taniguchi, Yosuke Kamiya, Katsuya Koike, Yoshihisa Toshima, Yasunori Akashi, Yoshihiro Kawahara
   Proceedings of the 11th ACM International Conference on Systems for Energy-Efficient Buildings, Cities, and Transportation (BuildSys'24), November 2024. (Acceptance rate: 30.3%)

5. Geometric Sound Profile: Multipath-Time-of-Flight Fingerprint for High-Accuracy Acoustic Localization.
   Yukiya Mita, Hiroaki Murakami, Takuya Sasatani, Yoshihiro Kawahara
   Proceedings of the 14th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'24), October 2024.
   🏅 Best Paper Award (1st Place)

6. Improving Coverage and Accuracy in Visible Light Positioning through Ceiling Reflection Modeling.
   Shota Shimada, Hiroaki Murakami, Ryo Tabata, Kota Tsubouchi, Takuya Sasatani, Yoshihiro Kawahara, Masanori Sugimoto
   Proceedings of the 14th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'24), October 2024.

7. Indoor 3D Positioning Method for a Microphone using a Single Speaker.
   Masanari Nakamura, Yuta Funada, Hiroaki Murakami, Hiromichi Hashizume, Masanori Sugimoto
   Proceedings of the 13th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'23), September 2023.

8. Data-driven Simulation of Wireless Communication Signal Strength in Indoor Environments.
   Takuhiro Shimokawa, Kota Tsubouchi, Yoshihiro Kawahara, Hiroaki Murakami, Masamichi Shimosaka
   Proceedings of the 13th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'23), September 2023.

9. PT-Sync: COTS Speaker-based Pseudo Time Synchronization for Acoustic Indoor Positioning.
   Takumi Suzaki, Hiroaki Murakami, Masanari Nakamura, Hiroki Watanabe, Hiromichi Hashizume, Masanori Sugimoto
   Proceedings of the 12th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'22), September 2022.

10. Expanding the Positioning Area for Acoustic Localization Using COTS Mobile Devices.
    Takumi Suzaki, Masanari Nakamura, Hiroaki Murakami, Hiroki Watanabe, Hiromichi Hashizume, Masanori Sugimoto
    Proceedings of the 18th EAI International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services (MobiQuitous'21), February 2022.

11. NL-Beep: A Ranging System between Multiple Smartphones Using Acoustic Sensing in NLOS Environments.
    Hiroaki Murakami, Yuki Kandori, Takumi Suzaki, Masanari Nakamura, Hiroki Watanabe, Hiromichi Hashizume, Masanori Sugimoto
    Proceedings of the 11th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'21), November 2021.

12. Indoor Localization Method For a Microphone Using a Single Speaker.
    Masanari Nakamura, Kento Fujimoto, Hiroaki Murakami, Hiromichi Hashizume, Masanori Sugimoto
    Proceedings of the 11th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'21), November 2021.

13. 3-D Localization for Smartphones using a Single Speaker.
    Hiroaki Murakami, Masanari Nakamura, Hiromichi Hashizume, Masanori Sugimoto
    Proceedings of the 9th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'19), September 2019.

14. Smartphone Localization Using Active-Passive Acoustic Sensing.
    Hiroaki Murakami, Masanari Nakamura, Shoma Yamasaki, Hiromichi Hashizume, Masanori Sugimoto
    Proceedings of the 8th IEEE International Conference on Indoor Positioning and Indoor Navigation (IPIN'18), September  2018.