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IWR1642BOOST: False Radial Targets

Mark Ackerson
Genius 10190 points
Part Number: IWR1642BOOST

Customer's evaluating IWR162BOOST and noticed targets appear to generate false targets at different angles. This looks like a pretty standard sync function in the radial dimension. But it seems to produce the limitation that you can only detect the strongest target at a given radial distance. Otherwise lower-strength targets at the same distance but different angles might get lost in the signal’s false radial energy.

This image uses the optimized settings TI provided.

This image uses the GUI default settings. You can see the full radial ring of noise more obviously in this data:

Please advise.

Thanks,
Mark

  • 0
    TI__Prodigy 545 points

    The arch shape at each radial distance is the angle spectrum generated by angle FFT. The default algorithm of angle estimation of out of box demo is FFT based algorithm and it only picks the maximum value at the same range bin. To detect multiple peaks in the same radial distance depends on multiple things.

    1) the ability to detect weak objects at the same radial distance also depends on the antenna coupling/mismatch. Less mismatch generates less side lobes and enables the detection of weak targets.

    2) angle estimation algorithm. Beamforming (FFT) is the basic algorithm features robustness and low computational cost, but the resolution is limited by aperture size. Other advanced algorithm like MVDR will generates narrower peaks.

    We will get back to you regarding the algorithm options available.