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AWR1642: Converting range-doppler heatmap value to dB scale

Kei
Intellectual 640 points
Part Number: AWR1642

Hello,

I have a question about converting range-doppler heatmap value to dB scale.
In the older demoVisualizer, e.g. version 3.1.0, the formula for AWR1642 is (value*6)/(256*numVirtAnt).
Please refer to the URL below.
e2e.ti.com/.../2895369

But in newer version, some calculation is added, which is 2^ceil(log2(numVirtAnt)) in Params.log2linScale.
Please refer to the URL below.
e2e.ti.com/.../iwr6843isk-ods-how-to-calcurate-relative-power

What is this added calculation for?

Regards,
Kei