SPRAC03 July   2024 IWR6843

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2TI mmWave Radar and Functional Safety
  6. 3IEC 61496-5 Functional Tests
    1. 3.1 Testing With Static Residual Movement
    2. 3.2 Detection Zone
    3. 3.3 Tolerance Zone
  7. 4Results
    1. 4.1 Response Time
    2. 4.2 Position Accuracy
      1. 4.2.1 Angular Accuracy Error Margins
    3. 4.3 Coexistance of Several RPDs
    4. 4.4 Interference by Object Outside the Detection Zone
    5. 4.5 Interference by Object Inside the Detection Zone
    6. 4.6 Manual Interference
  8. 5Environmental Tests
  9. 6Covered by Other Tests
  10. 7Test Setup Details
    1. 7.1 Detection Algorithm
  11. 8References

4.2.1 Angular Accuracy Error Margins

Between the angles of -40° and 40° there can be an expected angular accuracy error of around ±1°. At max FOV of around 60° you can expect an error of around 5°. This is a general case and angular accuracy may vary based on several factors such as antenna design, processing algorithm, calibration, and test target reflectivity.

For more details on angular and range accuracy as well as how it was measured, see System Performance Measurement With the mmWave Sensor.

Resulting Point Cloud of a Detection at 5.5m 65° Figure 4-2 Resulting Point Cloud of a Detection at 5.5m 65°

As long as the target is not entirely in the first range bin, the accuracy of the range will be based on the chirp configuration’s range resolution. The target being entirely in the first range bin only happens if the detected object is smaller than the chirp configuration’s range resolution, which can go as low as 3 cm.