Howtosignalprocessing
- What is FMCW radar used for?
- What's the difference between FMCW and CW radars?
- How FMCW radar overcomes the shortcomings of Doppler CW radar?
- What is beat frequency and how it is used in FMCW radar?
What is FMCW radar used for?
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'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 FMCW radar overcomes the shortcomings of Doppler CW radar?
CW radar or doppler radar does not measure range or distance of the target. This limitation of CW radar is overcome by FMCW radar. FMCW radar detects, measures range and radial velocity of the object.
What is beat frequency and how it is used in FMCW radar?
This frequency difference is called “beat frequency”. An occurring Doppler frequency would now move the frequency of the entire echo signal either up (moving towards the radar) or down (moving away from the radar). In this form of modulation, the receiver has no way to separate the two frequencies.
