IWR1443+DCA1000

user5972929

As shown in the picture is the track of human walking（A-->B-->C-->D）. The radar is located at the origin. When people walk far away from or near the radar, the speed can be detected. However, when people walk along B to C, the speed is close to 0。So I would like to ask if the radar can detect the speed of objects moving parallel to it (such as B-C)?

over 5 years ago

0 zigang Yang over 5 years ago

TI__Mastermind 39835 points

HI, there:

Yes, the Doppler speed is the actual walking speed projected to the target-sensor direction. Therefore, only when the target (person in your case) is in the middle of the B and C point will have zero Doppler. Other location will have non-zero Doppler. However, there is also Doppler resolution you need to consider. If the Doppler is less than your velocity resolution, then the Doppler will be detected as zero. Therefore, in order to detect the smaller Doppler during B->C stage, you need to check/improve your minimum velocity resolution.

There is training video on this topic. https://training.ti.com/intro-mmwave-sensing-fmcw-radars-module-3-velocity-estimation?context=1128486-1139153-1128544

Best,

Zigang

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