• November 2020
  • Low-cost four-frequency-band GNSS antennas
• October 2020
  • USB device port identification on Linux
  • New evaluation board for Allystar HD9310
  • Test release of RTK reference station observation data archive
• September 2020
  • Introduction of GNSS receiver NovAtel OEM729
  • Attaching GNSS external antenna connector to Sony Spresense
  • Quasi-zenith satellite CLAS augmentation information extraction using Allystar HD9310 Option C
  • Azimuth determination of installing survey grade GNSS antenna
  • LED alarm light using Raspberry Pi Zero WH
• August 2020
  • Invited talk at the Institute of Electronics, Information and Communication Engineers Integrated Circuit Study Group (held online)
• July 2020
  • Participation in the 2020 Convention of the Institute of Positioning, Navigation and Timing of Japan(held online)
• June 2020
  • Allystar HD9310 Firmware Update
  • Reception of DRM broadcasting signals using software defined radio KiwiSDR
• May 2020
  • Quasi-zenith satellite Michibiki's positioning library CLASLIB (Part 3 VRS-RTK positioning by ssr2obs)
  • Confirmation of SBAS signal over Hiroshima
  • Quasi-zenith satellite Michibiki's positioning library CLASLIB (Part 2 ssr2osr)
  • Quasi-zenith satellite Michibiki's positioning library CLASLIB (Part 1 Understanding the configuration)
• April 2020
  • Presentation at cluster Hiroshima LT
  • Texas Instruments 60 GHz millimeter-wave radar evaluation kit experiment
  • Three dimensional spatial range measurement with Livox Horizon LiDAR
• March 2020
  • Parametric speaker experiment
  • Four DC/DC converter experiments
  • AC power control by solid state relay
  • Microcomputers I use
  • Observation of optical spectrum using microspectrometer C12880MA and Analog Discovery 2
  • Battery charging with BQ25890, a Texas Instruments' IC
  • Remaining capacity estimation of Lithium-ion battery using Maxim MAX17201
• February 2020
  • Satellite positioning with GNSS-SDR on Debian running by VMware Player (failure)
• January 2020
  • Measurement of internal resistance of dry battery
• December 2019
  • Presentation at ITE winter convention
  • GPS signal reception with GNSS SDR
  • Coaxial cable switch
• November 2019
  • Powering to Latte Panda with JST PH 4P connector
  • QZSS's Disaster and Crises Management Report signal reception with Spresense, a Sony's board microcomputer
  • Experiment of Allystar HD9310
  • Upgrade of RTK reference station antenna
  • Exhibit at Hiroshima IT Exhibition 2019
  • Presentation at technical committee of IEICE Communication Systems at Kirishima
• October 2019
  • GPS/GNSS symposium of IPNTJ
• September 2019
  • Presentation at IEICE society conference
• August 2019
  • First trial of conductive wear hitoe
• July 2019
  • Diagnostics of USB-C cables
  • Presentation at conference of IEICE Technical Committee of Communication Systems
• June 2019
  • Dual frequency RTK reference station
  • Use of Emlid Reach observation data with RTKLIB
• May 2019
  • Invited talk at technical committee of IEICE Communication Quality
  • First trial of CLAS positioning of QZSS
  • Participation of annual conference of the Institute of Positioning, Navigation and Timing in Japan (IPNTJ)
• March 2019
  • Trial of receiving DRM broadcasting in Japan (failure)
• February 2019
  • Configuration of GNSS module ZED-F9P with u-center
  • First trial of Yamaha HEARTalk UU-002
• January 2019
  • Surface mount version of LoRa wireless communication module ES920LR
  • Purchase of the latest dual frequency GNSS positioning module u-blox ZED-F9P board
• December 2018
  • Rental of "Michibiki" compatible receiver from Quasi-Zenith Satellite System Service Co., Ltd.
• November 2018
  • First trial of realtime delivery of MADOCA product
  • First trial of LTE-M communication carrier type LPWA
  • Reception of one-segment broadcasting with GNU Radio and gr-isdbt on VirtualBox with vagrant
  • Trial of measurement of temperature, humidity, air pressure, and accelerations with Sigfox Una Shield V2S
• October 2018
  • Dual frequency positioning of Chinese smartphone Xiaomi Mi8 with Android GNSS Analysis Tool
• September 2018
  • Trial of next-generation nonvolatile memory FeRAM
  • Trial of M5Stack with ESP32
  • Trial of Spresense, a Sony's board microcomputer
  • Trial of python with Arty Z7, an FPGA board
  • Radiowave sensing with KiwiSDR
  • Trial of machine vision with OpenMV
• August 2018
  • Experiment on block chain with temperature and humidity data
  • Let's try RTK of several centimeter order positioning with an internet-connected PC
  • How to make an RTK reference station
  • Deep Sleep Mode on ESP-WROOM-32
  • GRUB trouble on Linux after partition movement
  • Use of Sigfox with Una Shiled V2S
  • Panorama photo of RTK reference station at Hiroshima City University (PC only)
• July 2018
  • Raspberry Pi Zero WH with cellular network connection
  • Trouble in RTK reference station
  • Presentation at ICTF 2018 in Graz, Austria
  • Noise sensing with RF Explorer
• June 2018
  • Lecture at Hiroshima version IoT Lightning Talk (IoTLT Hiroshima) Vol.9
  • Temperature, humidity, and lightning sensor experiments
• March 2018
  • Lecture and demonstration at Wireless IoT Seminar in Hiroshima
• January 2018
  • Placement of RTK reference station
• November 2016
  • Lab travel in Miyajima
• October 2016
  • Radio experiment in Ujina port of Hiroshima