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Radar Test Bench

Aside from cameras and ultrasonic sensors, radar sensors are the most commonly used environment sensors in the automotive industry. They are used in many applications, such as adaptive cruise control (ACC) and autonomous emergency braking (AEB), and will continue to play an important role in highly automated and autonomous driving. To be able to test realistically and reproducibly in the laboratory, various factors must be taken into consideration. On the one hand, a radar sensor must be stimulated by generated radar echoes that correspond to real radar objects, such as vehicles or pedestrians, at different distances, relative speeds, and azimuth angles. On the other hand, undesired radar reflections must be avoided by implementing adequate measures. With the radar test bench, dSPACE offers a reliable solution for realistically testing radar-based vehicle functions using a synchronized closed-loop HIL. Furthermore, the radar test bench enables verification tests of the radar sensor and its components as well as application specific measurement of the antenna diagram.  

Key Benefits

To test the entire chain of effects, the dSPACE radar test bench provides over-the-air stimulation of the radar sensor front end. If desired, the simulation can include the front bumper and chassis of the vehicle. This way, all the software and hardware layers can be taken into account, from detecting the signal at the front of the radar to evaluating it in the radar ECU. This very compact test bench fundamentally consists of an anechoic chamber with send/receive functionality, a calibrated dSPACE Automotive Radar Test System (DARTS), and a SCALEXIO HIL simulator. For the test, the radar sensor is locked into the chamber, where it is stimulated with up to five realistic radar echoes. The coherent echoes allow for the radar ECU to reliably determine the distance and the velocity of the radar objects. The concentric movement of the antennas returns information on their azimuth angle. Driving scenarios that are simulated with the Automotive Simulation Models (ASM) are the basis for this. The radar ECU is also connected to the HIL simulator via a vehicle bus for exchanging the list of detected radar objects with the simulation environment in closed-loop operation. The flexible test bench supports radar sensors with 24, 77, and 79 GHz of any modulation scheme. The radar test bench can be adjusted to individual requirements and operated synchronously with further radar test benches or with other test systems (camera, ultrasound, etc.). 

Parameter Specification
Radar objects
  • Up to five fully independent objects with the following manipulation parameters:
    • Distance
    • Velocity
    • Radar cross section (RCS)
    • Azimuth angle
Update rate
  • 1 ms
Distance range Increment
  • 2.0 ... 1000 m
  • 6.0 cm
Speed range Increment
  • ±700 km/h
  • 4 mm/s
Azimuth angle range Accuracy
  • ±90°
  • 0.05°
Azimuth angular speed
  • Max. 200°/s
Supported radar frequencies
  • 23-26 and 75-82 GHz
  • 1000 or 4000 MHz

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