Using a A prototype 77GHz radar with had its' FMCW output modified to provide frequency-ramps in alternate directions, the dataset rather than the sawtooth pattern applied to production radars.
This prototype radar was mounted on the roof of a vehicle at ~2.5m above road-level. The radar’s output was recorded over a short journey (31/01/2023) and is available to download from the bottom of this page was captured from a moving vehicle.
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All radar data is subject to a positional shift dictated by the doppler effect, as discussed here: https://arxiv.org/pdf/2011.03512.pdf.
The magnitude of the doppler shift that associated with a specific object presents is dependent on the radial velocity of that object, from the radar’s frame of reference.
This specific adaptation to the radar’s usual mode of operation causes the “direction” of doppler shift for every azimuth of data captured to alternate, which allows for easier programmatic identification of the radial speed component of features within the radar’s field of view.
The following slideshow provides a little more detail:
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Please get in touch at industrial.automation@navtechradar.com if you would like to explore this work further.
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Playing back the radar data as a TCP stream is done using using the playback utility.
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