How the LIDAR tech GM just bought probably works

Re:How the LIDAR tech GM just bought probably works by dllu on Tuesday October 24, 2017 @05:18PM (#15545318)

I don't see how you can say millimetre wave radar "does the job many times better".

State-of-the art 79 GHz automotive radar: 0.2 m range uncertainty, 5 degree azimuth angular uncertainty, dozens of points per second.

Spinning lidar: <0.05 m range uncertainty, <0.1 degree azimuth angular uncertainty, a million points per second.

Radar definitely has its uses as it can see through weather conditions and tell velocity, but lidar is the vastly superior sensor otherwise.

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Re:How the LIDAR tech GM just bought probably works by baybal2 on Tuesday October 24, 2017 @06:09PM (#15545651)

Looks surprisingly close to specs of a Panasonic made radar.

That is far from what is currently considered advanced for mm-wave radar in 93-95ghz range - 0.5 degrees

Google "GPU Acceleration of SAR/ISAR Imaging Algorithms" and see how much you can get with with regular high bandwidth 10ghz radar and computing power in tenths of gigaflops.

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Re:How the LIDAR tech GM just bought probably works by rmonroe on Wednesday October 25, 2017 @12:48AM (#15547553)

SAR generally relies on assumptions that your target is not changing. I question how well it would work in a complicated environment like a road scene. In my opinion, the single-shot nature of LIDAR is more robust. But its possible that SAR techniques have advanced since my work in it 3 years ago.

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