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Tool/software:
Hello Officer,
I am trying to calculate the maximum detectable range value based on the Signal-to-Noise Ratio (SNR) using AWR2944. The required formula is referenced from the Texas Instruments Programming Chirp Parameters in TI Radar Devices documentation, and I have shared the formula below.
I am confused about one aspect of this formula. I know, or can obtain, the values of all the parameters except one: SNR(det). This parameter is described as the minimum SNR required by the algorithm to detect an object.
However, I am struggling to both understand and define this parameter in the context of my calculation.
Could you please provide clarification about this parameter?
Best regards,
Mehmet Serhat Arslan
Hi Serhat,
I will need 2 days to check with the team. In the meantime, you can use the following formula for the maximum range -
Regards,
Samhitha
Hi Samhitha,
I have configured all the parameters according to the Texas Instruments documentation, and I would like to share the outcome of my calculations.
I would greatly appreciate it if you could provide feedback on whether my approach is correct. To be concise, I just want to ensure that these calculations are suitable for this application.
I found this site very useful for obtaining the parameter values. : Texas Instruments Forum - Range Estimation for AWR2944 IC.
According to these parameters, when I input an RCS of 5 m² for the object, the outcome of the calculation is 215 meters.
According to these parameters, when I input an RCS of 8 m² for the object, the outcome of the calculation is 242 meters.
Is this approach correct? I look forward to your reply. Thank you for your interest.
Best Regards,
Mehmet Serhat Arslan
Hi Serhat,
According to these parameters, when I input an RCS of 5 m² for the object, the outcome of the calculation is 215 meters.
According to these parameters, when I input an RCS of 8 m² for the object, the outcome of the calculation is 242 meters.
Did you consider the loss of signal?
Regards,
Samhitha
How can I account for the loss of signal in the system? How can I include the effect of signal loss in our system? I wonder which parameter I should use.
When I searched for the parameters related to signal loss, I came across Free Space Path Loss (FSPL), atmospheric attenuation, and hardware losses.
However, these parameters are not suitable for accurate modeling. How should I approach the effects of these parameters? Can we make a rough calculation of these effects.
Best Regards,
Mehmet Serhat Arslan
Hi Serhat,
I have checked about this internally. Radar equation literature can be searched on the web. You can refer to the following E2Es where these questions are already addressed -
(+) IWR6843AOPEVM: Calculation of Radar Equation - Sensors forum - Sensors - TI E2E support forums
Regards,
Samhitha