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IWR6843: Automotive toolbox / Overhead mount occupancy lab

Part Number: IWR6843

Hi.

I am customizing reference SW for IWR6843 sensor: Automotive toolbox / Overhead mount occupancy lab.

In the default chirp configurations in the reference code the chirp number is set to 220.

While debugging the code, I found that the function for inverse covariance matrix calculation in Capon beamformer module assumes that the number of chirps is divisible by 8 (file RADARDEMO_aoaEst2DCaponBF_rnEstInv.c).

Thus, it looks like not all chirp samples are counted when covariance matrix is estimated.

Is it right?

Should I always set the number of chirps in that lab divisible by 8?

Thank you.