IWR6843AOP: IWR6843AOP :One chirp duration

baha eddine jouili

Part Number: IWR6843AOP

Tool/software:

We are currently working with the Texas Instruments TI IWR6843AOP radar module and are looking to calculate the duration of one chirp — specifically, the time from the start of one chirp until the receiving it. We would appreciate any assistance with the following questions:

1-how to calculate the chirp duration on the TI IWR6843AOP radar, including the formula and any relevant parameters required?

2-Are there any specific settings or configurations in the radar's programming that affect this calculation?

3-There is any documentation or reference materials that may help in understanding the chirp duration calculation for this module?

Additionally, we are interested in understanding the latency associated with this radar module.

Best regards,

5 months ago

0 Sharan S S 5 months ago

TI__Expert 4150 points

Hi,

Please refer this document to understand more about programming chirp parameters.

https://www.ti.com/lit/an/swra553a/swra553a.pdf

You can also use mmWaveSensingEstimator(https://dev.ti.com/gallery/view/mmwave/mmWaveSensingEstimator/ver/2.4.0/) to change the paramters and check how it impacts the chirp profile.

Regards

0 baha eddine jouili 5 months ago in reply to Sharan S S

Prodigy 10 points

Is the value of the chirp repetition period, Tr, the same?

0 Sharan S S 5 months ago in reply to baha eddine jouili

TI__Expert 4150 points

Hi,

Yes, it'll be the same across all the frames.

Regards

0 baha eddine jouili 5 months ago in reply to Sharan S S

Prodigy 10 points

hello,

I mean if the time from the start of one chirp until it is received (as indicated in the image above) is equal to the chirp repetition period Tr?

Regards

0 Sharan S S 5 months ago in reply to baha eddine jouili

TI__Expert 4150 points

Hi,

Yes, if multiple tx are used then chirp repetition period is numTx * (chirpIdleTime + rampEndTime)

Regards

0 baha eddine jouili 5 months ago in reply to Sharan S S

Prodigy 10 points

We would like to determine the radar's latency. Specifically, we aim to calculate the time elapsed from the start of a chirp to the moment it is received. Do you have any ideas?

0 Sharan S S 4 months ago in reply to baha eddine jouili

TI__Expert 4150 points

Hi,

If you know the distance to a strong target from the radar, then time elapsed would be 2* (distance to target)/speed of light

Regards

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IWR6843AOP: IWR6843AOP :One chirp duration