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mmWaveSesnsingEstimator

Prodigy 725 points

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There is a question is about the mmWaveSensingEstimator on ti.com and its precision (tolerance consideration).

Following quotation for SNR calculation has been found in our training material.

https://training.ti.com/sites/default/files/docs/mmwaveSensing-FMCW-offlineviewing_0.pdf

 

It’s about calculationg the maximum measurement time T_meas which depends of the number of chirps and chrip duration.

Furtheremore it’s obvious by the code of mmWaveSensingEstimator that the number of virtual antennas (num_virtual_rx) is considered.

 

For calculations of different systems we used a custom tool which uses instead of the measured time T_meas the system bandwith for SNR calculation.

Furhtermore we cosidered quantization of the ADC and the process gain of signal processing.

 

It’s clear that the mmWaveSensingEstimator is “ just” a estimator for a rough estimation.

Neverthless, I like to understand why TI is using the SNR quotaion with T_meas.

 

Can you elaborate a bit more on the background and the tolerances we have experienced by this quotation.