AWR2944EVM: Clarification on SNR(det) Parameter for Maximum Detectable Range Calculation

Serhat Arslan

Part Number: AWR2944EVM
Other Parts Discussed in Thread: AWR2944

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

9 months ago

0 Samhitha Bobba 9 months ago

TI__Mastermind 21050 points

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

0 Serhat Arslan 9 months ago in reply to Samhitha Bobba

Intellectual 330 points

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

0 Samhitha Bobba 9 months ago in reply to Serhat Arslan

TI__Mastermind 21050 points

Hi Serhat,

Serhat Arslan said:
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

0 Serhat Arslan 9 months ago in reply to Samhitha Bobba

Intellectual 330 points

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

+1 Samhitha Bobba 9 months ago in reply to Serhat Arslan

TI__Mastermind 21050 points

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 -

(+) AWR1243BOOST: How to calculate SNR as shown in equation (2) of application note swra553 - Sensors forum - Sensors - TI E2E support forums

(+) AWR1642BOOST: The difference between the radar equation and measured data of SNR - Sensors forum - Sensors - TI E2E support forums

(+) IWR6843AOPEVM: Calculation of Radar Equation - Sensors forum - Sensors - TI E2E support forums

Regards,

Samhitha