A micro doppler works by detecting small periodic movements in an object that cause variations in the frequency of the reflected signal. This is achieved by analyzing the temporal characteristics of the returned signal to identify micro-motions, such as limb swinging or machine vibrations.
These micro-motions modulate the primary Doppler shift, creating sidebands that can be used to classify and identify different types of movements and objects.
The micro Doppler effect is a phenomenon that extends the traditional Doppler effect by considering the fine-scale periodic movements of parts in a moving object. These movements create additional frequency modulations on top of the main Doppler shift caused by the overall motion of the object.
This effect is useful for distinguishing and analyzing detailed motion patterns in applications such as radar and sonar, providing more granular information about target behavior.
Microwave Doppler radar works by emitting microwave signals toward a target and then receiving the reflected signals. As the target moves, the frequency of the reflected signals changes due to the Doppler effect. By measuring the frequency offset between the transmitted and received signals, the radar can determine the speed of the target.
This technology is commonly used in applications such as weather monitoring, speed enforcement, and motion detection.
Doppler works by measuring the change in frequency or wavelength of waves, such as sound or light, as they reflect a moving object relative to the observer. As the object moves toward the observer, the frequency increases (Blueshift), and as the object moves away, the frequency decreases (redshift).
This change in frequency can be used to calculate the relative speed of the object, making Doppler techniques valuable in various fields, including astronomy, medical imaging, and radar technology
