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IWR1443BOOST: Influence of distance between target and radar on measurement accuracy

kelong zeng
Intellectual 380 points
Part Number: IWR1443BOOST

Dear engineer，

When using radar to measure a vibrating target, if the target is too far away from the radar, the measurement accuracy will be reduced. However, if the distance is very close, will the radar measurement accuracy also be affected?

  • 0
    TI__Expert 4448 points

    Hi Kelong, 

    Yes, very close to the radar device, measurement accuracy deteriorates. It is hard to detect anything within the first few range bins. In general, you should be able to obtain decent distance measurements by the 5th range bin. The per-bin range increment is based on your range resolution, so if your range resolution is 4cm, then accurate distance measurements will be obtained around 20cm. At 1m and further, you will have the greatest accuracy.

    In the configuration file, the chirp configuration, ADC configuration, and high-pass filter configuration all directly affect this minimum accurate distance.

    Several other threads have been asked on this topic, you can check them out if you wish:

    Hope this helps,

    Luke

  • 0 in reply to Luke Rouleau
    Intellectual 380 points

    HI Luke,

    Could you explain this sentence ''At 1m and further, you will have the greatest accuracy'' to mein more detail? How is the value of 1m calculated?

    Is there an optimal distance? How to calculate?

    By the way, my distance resolution is 6.5cm.

    Best,

    Kelong

  • +1 in reply to kelong zeng
    TI__Expert 4448 points

    Hi Kelong,

    By "at 1m and further, you will have the greatest accuracy", I meant that 1m is a safe rule-of-thumb distance for range resolution performance. Getting accurate performance closer than 1 meter depends on configuration parameters and can vary significantly. It all depends on your setup and use case.

    If your range resolution is 6.5cm, and considering good measurements will be obtained by the 5th range bin, then you should be able to have accurate range measurements around 32.5 cm away from the sensor and and further. 

    Experimentation with the device is always a great way to get a sense of its performance limitations.

    Regards,

    Luke