4 ms·
Coded pulses: rather than emitting a uniform beam, they emit a pulse and listen for that back. You can think of it a little like a bar code, a sequence of short
by brians 9y ago
Coded pulses: rather than emitting a uniform beam, they emit a pulse and listen for that back. You can think of it a little like a bar code, a sequence of short and long, on and off. Then select for that on receive.
- rubicon33 9y agowhat happens if another source uses the same pattern?
- DaiPlusPlus 9y agoLIDAR units could cycle through randomly-generated patterns for each pulse - if they can be made unpredictable then it would be impossible for someone to confuse a LIDAR unit by copying its pulses. Assuming it's a time-of-flight LIDAR then the time required for an attacker to read a pulse and send back their own signal would be greater than the time of the original signal to return - and if the sending LIDAR has a sufficiently short timeout then even an attacker using Vanta-black to absorb all of the victim's lasers still won't be able to respond quickly enough.