Continuing on from: IWR6843: Variability in performance - Sensors forum - Sensors - TI E2E support forums
We have implemented calibration in our sensor. However as we have based our firmware on the people counting demo which does not support calibration.
Everything I read about calibration also only indicates that it should improve accuracy, rather than extend the range/capabilities of the sensor.
Nevertheless, we adapted the OOB demo to obtain the compRangeBiasAndRxChanPhase coefficients, however after testing several samples with compRangeBiasAndRxChanPhasecoefficients (unique to each board) the performance in general went down significantly, most sensor could no longer identify a target within its FOV, except nearest to the sensor.
Is there any specific testing that could suggest why there is such variability in performance as it seems very likely that this is a hardware issue?
The primary though I have to the variability is with the manufactured antenna geometry, PCB materials or the reflow activity.
Would a VNA be useful in diagnosis of antenna performance? as it could potentially diagnose the antenna geometry and PCB materials and remove question about the reflow activities.
Thanks in advance
Matthew