Doppler shift compensation technique for ultrasonic DSSS ranging system. - Toru Ishii; Yukiko Yoshikawa; Shintaro Izumi; Hiroshi Kawaguchi 001 (I2MTC, 2020)

12.5-m Distance Measurement in High-Interference Environment Using Ultrasonic Array Sensors. - Yukiko Yoshikawa; Yuto Yasuda; Toru Ishii; Shintaro Izumi; Hiroshi Kawaguchi 001 (I2MTC, 2021)

Subcentimeter Precision Ranging System for Moving Targets With a Doppler-Effect- Compensated Ultrasonic Direct Sequence Spread Spectrum. - Toru Ishii; Yukiko Yoshikawa; Shintaro Izumi; Hiroshi Kawaguchi 001 (IEEE Trans. Instrum. Meas., 2021)

20-µs Accuracy Time-Synchronization Method using Bluetooth Low Energy for Internet-of-Things Sensors. - Masayasu Harada; Shintaro Izumi; Ryosuke Kozeni; Yukiko Yoshikawa; Toru Ishii; Hiroshi Kawaguchi 001; Shohei Uemura; Kaname Araki (CCNC, 2022)

Method for Completing Missing User Data to Personalize Nudge Messages. - Yukiko Yoshikawa; Yuki Katsumata; Meisaku Suzuki; Kouya Tsukamoto; Takashi Suzuki; Taro Ishikawa (ICMU, 2023)