Qualities that the Radar System Should Posses for ADAS

Qualities that the Radar System Should Posses
Radar based Advanced Driver Assistance Systems (ADAS) are used to help the driver in the complex process of controlling the vehicle.
Characterized by the use of short range (24GHz) and long range (77GHz) radars to analyze the environment around the car.
Depending of the TX/Rx antenna position (front, rear and side), they can address the following applications:
  • Adaptive Cruise Control (ACC)
  • Blind-spot Detection (BSD)
  • Emergency Braking
  • Forward Collision Warning (FCW)
  • Headway Alert
  • Mitigation and Brake Support
  • Pre-crash Detection
  • Rear Collision Protection (RCP)
  • Stop & Go






















Key Features
·         Ability to sweep wide RF bandwidth (GHz) while keeping IF bandwidth small (MHz)
·         Better range resolution.
·         RF sweep bandwidth of 2 GHz can achieve 7.5cm range resolution, while IF bandwidth can still be <15 MHz

  














Performance
·         Range precision ∝ RF (sweep) Bandwidth
·         Velocity precision ∝ Dwell (frame) time
·         Angle precision ∝ Number of Tx,Rx


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