u-blox M8 3D Dead Reckoning GNSS chips

u-blox M8 3D Automotive Dead Reckoning GNSS chipsUBX-M8030-Kx-DR is u-blox’ industry-proven off-the-shelf Automotive Dead Reckoning (ADR) solution. u-blox ADR combines concurrent GNSS and sensor digital data using a tightly coupled Kalman filter. This improves position accuracy during periods of unavailable or degraded GNSS signals.

The single-chip ADR solution supports a variety of sensor combinations, such as wheel ticks, single-axis / 3-axis gyroscope, and single-axis / 3-axis accelerometer. The accelerometer sensor support also improves performance during altitude changes without a GNSS signal, such as in tunnels, through multi-level highways, park houses or underground parking.


    • 100% coverage, continuous 3-Dimensional positioning, even in multi-level parking garages, highway interchanges, and tunnels
    • Automatic sensor calibration; configurable lever arm correction
    • Pin compatible with UBX-M8030-Kx
    • 20 Hz position update rate
    • Available in standard and automotive grade


  • Receiver type
    • 72-channel u-blox M8 engine
    • GPS/QZSS L1 C/A, GLONASS L10F, BeiDou B1
    • Galileo-ready E1B/C (with future Flash firmware)
  • Time to first fix
    • Cold start: 26 s
    • Aided starts: 2 s
    • Hot starts: 1 s
  • Sensitivity
    • Tracking & Nav.: –160 dBm
    • Reacquisition: –160 dBm
    • Cold start: –148 dBm
    • Hot start: –156 dBm
  • Operational limits
    • Max nav. update rate 20 Hz
      (For update rates > 2 Hz, extrapolation techniques are applied)
    • Max. velocity 500 m/s
    • Velocity accuracy 0.05 m/s
    • Heading accuracy 0.3 degrees
    • Horizont. pos. accuracy 2.0 m CEP
      (For default mode: GPS/SBAS/QZSS+GLONASS with TCXO)
  • Sensor alignment pitch, roll, yaw alignment by command
  • Antenna placement offset axis x,y,z placement off-set by command
  • Wheeltick supports low wheel ticks (1 tick < 50 cm travel distance)
  • Map matching Aid for improved navigation
  • Multi -GNSS Assistance
    • AssistNow Online
    • AssistNow Offline (up to 35 days)
    • AssistNow Autonomous (up to 3 days)
  • Oscillator supports GNSS crystal or TCXO
  • LNA Built-in
  • RTC input 32.768 kHz (optional), RTC can be derived from GNSS Crystal or TCXO
  • Antenna supervision: short and open circuit detection supported with external circuit.
  • DC/DC converter: built-in, external component required
  • Anti jamming active CW detection and removal
  • SQI flash support needed for ADR FW 3.00,
    • AssistNow Offline, AssistNow
    • Autonomous improved performance, and data logger



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