AWR1642: What is AWR1642 Receiver Sensitivity Level?

Hello Jesse,
The SNR requirement for the object detection would finally depend on the algorithm used for the detection. This would be customer implementation specific since that part of the code is implemented by the customer. As an example the SNR threshold in the mmw demo application is set to ~14.5dB but can be changed using the "cfarCfg" command in the mmwave demo application.

On the device side the receiver noise figure is around 16dB . I notice you are referring to 1khz /100khz sin wave inputs, please note that there are two programmable internal high pass filter (HPF) on the receiver chain which have a minimum cut off bandwidth of 175Khz and 350Khz. So a 1Khz or 100Khz signal would get attenuated by these HPFs.

Regards,
Vivek

Hi Vivek,

 Thanks for SNR explanation.

 For sine wave, my meaning is to input a fix frequency of 77GHz sine wave with 1kHz/100kHz offset, and 10dB SINAD. Not input a sine wave of 1kHz/100kHz. Then what will be AWR1642's sensitivity level in dBm?

Sincerely, Jesse.

Hello Jesse,
In radar typically we do not refer to sensitivity levels of a receiver but just the SNR required for object detection . Based on the threshold set in the detection algorithm the sensor would be more sensitive or less sensitive.
I understand, I was referring to 1khz/100Khz offset from 77Ghz. If you set the LO at a fixed frequency of 77Ghz and feed a 77Ghz+1Khz signal the IF frequency would be 1Khz and the HPF would filter it.

regards,
Vivek

Hi Vivek,

 Thanks. It's clear to me now.

Jesse.