Howtosignalprocessing
- How does FMCW radar work?
- What is signal processing in radar?
- What is the basic difference between CW and FMCW radar?
- What is beat frequency and how it is used in FMCW radar?
How does FMCW radar work?
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 signal processing in radar?
The signal processor is that part of the system which separates targets from clutter on the basis of Doppler content and amplitude characteristics. In modern radar sets the conversion of radar signals to digital form is typically accomplished after IF amplification and phase sensitive detection.
What is the basic difference between CW and FMCW radar?
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. In the FM–CW radar, the transmitted frequency changed as a function of time in a known manner.
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.
