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moodoki / radical_sdk

RaDICaL dataset SDK
https://moodoki.github.io/radical_sdk/
Apache License 2.0
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Inquiry Regarding Beamforming Angle Range for AWR1443 Raw Signal Processing #11

Closed songhee-cho closed 5 months ago

songhee-cho commented 6 months ago

Hi, I noticed that in the processing pipeline for raw signal data from the AWR1443 sensor, a beamforming angle range of -90~90 degrees (180-degree) is being utilized. However, considering that the sensor boasts a 120-degree Field of View (FoV) and features 8 virtual antenna elements, I am curious about the rationale behind this specific angle range selection.

moodoki commented 6 months ago

120-degree field of view refers to the 3dB fall off angle based on the antenna design. I chose to beamform for +-90 degree as FFT beamforming naturally gives you +- 90deg. I've simply set the other beamforming methods to give me the same angles for convenience.

songhee-cho commented 6 months ago

Thank you for your helpful response. I have another query: What would be the distinction between beamforming the data for ±60 degrees compared to for ±90 degrees for this dataset?

moodoki commented 6 months ago

Since the falloff beyond $\pm 60 ^\circ$ is $\geq 3 \text{dB}$, you can expect that signals there are very weak. Otherwise, there isn't much difference.