Example of Application

ACADEMIC RESEARCH AND APPLICATIONS

Radar Micro-Doppler Signatures

Radar micro-Doppler signatures can be used to identify human activities, such as walking, running or jumping, to monitor and predict human behaviors, and to detect a person at a distance.  Human gait analysis is useful in biomedical engineering, sports medicine, physiotherapy, medical diagnosis, and rehabilitation.  Compared with the visual perception of the human body motion, the radar micro-Doppler method is not affected by distance, variations in lighting, deformations of clothing, and occlusions on the appearance of human body segments.

In the micro-Doppler signature of a walking human, each forward leg swing appears as large peaks, and the left and right leg-swing completes one gait cycle.  The body torso motion that is the stronger component underneath the leg swings tends to have a slightly saw-tooth shape because the body speeds up and slows down during the swing as shown. It is possible to classify and identify bodies and their movements based on radar micro-Doppler signatures for human gaiting.

The SDR-KIT 980B can be used as a micro-Doppler radar.  The micro-Doppler radar using FMCW waveforms can provide more than 10 dB SNR on a 1 square meter RCS at a distance up to 50 meters.

  1. RADAR MICRO-DOPPLER SIGNATURES OF A WALKING PERSON 

In this trial, the SDR-KIT 980B with 400 MHz bandwidth was used to capture an approaching walking person starting at a distance about 10 m.

MicroDopplerOfWalkingMan

 

  1. RADAR MICRO-DOPPLER SIGNATURES OF A RUNNING PERSON

In this trial, the SDR-KIT 980B with 400 MHz bandwidth was used to capture an approaching running person starting at a distance about 10 m.

MicroDopplerOfRunningMan

 

  1. RADAR MICRO-DOPPLER SIGNATURES OF MODEL HELICOPTER 

In this trial, the SDR-KIT 980B with 400 MHz bandwidth was used to capture a model helicopter with rotating rotor blades at a distance less than 10 m.

MicroDopplerOfHelicopter

 

  1. RADAR MICRO-DOPPLER SIGNATURES OF A QUADCOPTER

In this trial, the SDR-KIT 2400AD2 with 500 MHz bandwidth was used to measure both radial and angular velocity of a drone quadcopter with rotating rotor blades at a distance less than 0.7 m and a 90-degree radar depression angle. Antennas spacing was set at 5λ.

drone-experiment