MMWCAS-DSP-EVM: Velocity scaling issue in bin file data processing

senal Perera

Part Number: MMWCAS-DSP-EVM
Other Parts Discussed in Thread: MMWCAS-RF-EVM, , AWR1243

Tool/software:

We use the MMWCAS-DSP-EVM with the MMWCAS-RF-EVM (AWR1243 cascaded 4-chip radar module).

Using MATLAB software, we plot range-Doppler maps by processing the captured data stored in bin files (outputs from the MMWAVE Studio software).

In the range-Doppler map, the velocity is not displayed correctly, meaning the velocity scale does not match our data.

How can we set the velocity scale correctly? Can you share any codes or references if available?

6 months ago

0 Samhitha Bobba 6 months ago

TI__Genius 14870 points

Hi Senal,

Refer to the MATLAB examples present in C:\ti\mmwave_studio_03_00_00_14\mmWaveStudio\MatlabExamples.

senal Perera said:
In the range-Doppler map, the velocity is not displayed correctly, meaning the velocity scale does not match our data.

Recheck the velocity resolution computation.

Regards,

Samhitha

0 senal Perera 6 months ago in reply to Samhitha Bobba

Intellectual 260 points

The velocity resolution computation is correct. I have another problem.

In the range-Doppler map, when the object moves in the positive direction along the range axis, it is correctly reflected in the plot as moving in the positive direction.

However, when the object moves beyond the maximum distance shown on the positive side of the range axis, it suddenly appears at the far end of the negative side of the range axis and moves towards the positive side.

Why does this happen?

0 Samhitha Bobba 6 months ago in reply to senal Perera

TI__Genius 14870 points

Hi Senal,

senal Perera said:
However, when the object moves beyond the maximum distance shown on the positive side of the range axis, it suddenly appears at the far end of the negative side of the range axis and moves towards the positive side.

Range is always positive. Do you mean that velocity is negative?

Regards,

Samhitha

0 senal Perera 6 months ago in reply to Samhitha Bobba

Intellectual 260 points

yes, it is my fault . i refer velocity axis.

0 Samhitha Bobba 6 months ago in reply to senal Perera

TI__Genius 14870 points

Hi Senal,

Refer to the following E2E which provides detailed explanation regarding your query - (5) AWR1642: What happens if the velocity of an object exceeds the maximum detectable velocity of radar? - Sensors forum - Sensors - TI E2E support forums.

Regards,

Samhitha