• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 30 subscribers
  • Views 253 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DCA1000EVM: Disable Interference avoiding

Alejandro Castilla Garcia
Prodigy 120 points
Part Number: DCA1000EVM
Other Parts Discussed in Thread: IWR6843ISK

Hello, my name is Alex.

We recently bougth a pair of DCA1000 with IWR6843ISK for a project. 

We are interested on forcing the radars to catch the interference instead of avoiding, we tried different configuration and we were able to get the parallel interference of the other radar using the same chirp and slope configuration as we expected, however we noted that the interference disappear and is only able to be saw in 1 frame.

We were discussing that the problem migth be the radar is mitigating it because of any hidden or by-us-unknown option. We would like to know which would be the better configuration to obtain the interference clearly.

I attach an image showing the IF we need to get continously, and it can be seen how it dissapear with the chirps.

  • 0
    TI__Mastermind 20801 points

    Hi Alex, 

    Sorry about the delay here. I'm looking into this for you, please expect a response tomorrow afternoon (CST). 

    Best Regards,

    Josh

  • 0 in reply to Josh Dye
    Prodigy 120 points

    Hello Josh, is there any update about this topic?

    Alex

  • +1 in reply to Alejandro Castilla Garcia
    TI__Mastermind 20801 points

    Hi Alex, 

    Very sorry again for the delayed response. Since you have mentioned that you have purchased DCA1000 I assume you are collecting raw ADC data using mmWave Studio and then performing some post-processing on the ADC data is this correct?

    If so, please note that mmWave Studio is not applying any interference mitigation techniques. A likely explanation for only seeing the interference in one frame is that the two devices are not synchronous, so when one device was sampling the data on it's RX channels the other device may not be transmitting in the same band. It is very difficult to force parallel interference to occur unless there is some method applied to synchronize the chirping between the two radars. 

    Please check out this application note if you have not already as it has some information about interference in TI radar devices which you may find useful: https://www.ti.com/lit/an/swra662a/swra662a.pdf 

    Best Regards,

    Josh