Fmcw technology

1. What is FMCW technology?
2. What is FMCW used for?
3. What's the difference between FMCW and CW radars?
4. How does FMCW LiDAR work?

What is FMCW technology?

A Frequency Modulated Continuous Wave Radar or FMCW Radar system is a special type of radar system that measures both distance and velocity of moving objects. This is achieved by continuously varying the frequency of the transmitted signal by a modulating signal at a known rate over a fixed time period.

What is FMCW used for?

Frequency Modulated Continuous Wave (FMCW) radar is a form of radar where the frequency of the transmitted signal is continuously varied at a known rate over a defined time period. The reflected frequency signal is received by the radar and compared.

What's the difference between FMCW and CW radars?

The CW radar can measure the Doppler frequency of the target, but it cannot measure the target range. The frequency-modulated CW radar (FM–CW) can measure both the range and Doppler frequency of the target.

How does FMCW LiDAR work?

In terms of how FMCW LiDAR basically works, modulated light is split into two; one portion is transmitted to the target area (Tx) while the second is kept local (LO) to the device. The laser light that hits various objects is bounced back (Rx), subsequently detected and interferometrically recombined with the LO.