Two coherent LiDAR modulation formats are compared by the minimum required number of photons per pixel. Phase-coded and linear frequency chirp modulations are found to result in similar sensitivity of a few photons per pixel.

Image for post
Image for post
(Image credit: iStock/Pobytov)

There are many different LiDARs on the market today. They have a variety of specifications, and standards are yet to be developed. On a very fundamental level LiDARs can be classified by how they transmit (modulation format) and how they receive (detection method) light. Most commercial LiDARs use high power amplitude-modulated lasers and direct detection.

In coherent detection LiDAR, a low power frequency modulated continuous…

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store