IWR6843AOPEVM: Get only data from Humans less than 3 meters

Hello,

If you are using DCA1000 with mmWaveStudio, you can put the values of your chirp design into our mmWaveSensingEstimator which will calculate many different resulting statistics of your chirp design, one of it being max range. It will also tell you what parameters to change in order to increase/decrease max range by hovering your mouse over the max range output box.

https://www.ti.com/mmWaveSensingEstimator

Best Regards,

Pedrhom

Pedrnorn,

Thanks.  I did bring up the Estimator and adjusted the range parameters.  However, at first I could not download the file as my computer blocked it.  After resolving that issue, the downloaded file is in xxxx.cfg format.  The config in mmWaveStudio for the config input will only accept xxxx.bin files.  So, I can't put it anywhere.  It appears to be in ascii format.  What to do next?  

Regards,

Larry

Pedrnorn,

I have some other questions regarding the 6843AOP.  I actually want to have a very narrow tx beam so that just a single person at 2 to 3 meters is picked up.  Is that possible?  How can I use the 3 Tx antennas to get a more focused beam?  When I look at the antenna patterns of individual tx and Rx antennas, they are very broad easily out to 60 degrees plus.  I don't want any sweeping either.  Just a narrow forward looking tx and rx and static.  How? 

Regards,

Larry   

Hello Larry,

The cfg file is for our demos, but you can use the SensingEstimator to create a config you are happy with, then match it via changing the parameters on the SensorConfig tab of mmWaveStudio.

As far as beamforming goes, we have a lab that focuses on it and this PDF that gives more details here:

https://dev.ti.com/tirex/explore/node?a=1AslXXD__2.00.00.06&node=A__AE-Bpc-wQfi-OR.2V9TzCw__radar_toolbox__1AslXXD__2.00.00.06

Best Regards,

Pedrhom

So I can't download the xxx.cfg file and use it directly?  It says I can. Go figure. Also, I could be wrong but on the Sensing Estimator Output, there are a lot of outputs to change.  I am not sure they all exist in the SensorConfig Tab.  Can you verify that?  But, I must change them manually then? 

Next, I can only select two Tx antennas when using the 6843AOP.   I want a narrow directed beam using all three.  How to select three when one is grayed out?  Please show me a screen shot of where to select the three in Sensor Config Tab.  I can't.  Thanks.  

Pedrhom,

Thanks so much.  It is working now with all antennas and distance at 3 meters.  I would like to get a cloud point plot using mmWaveStudio.  Is that possible?  If now, I have tried using mmWave_Demo_Visualizer.  I have a IWR6843AOPEVM connected to a DCA1000EVM.  When I try running the Demo Visualizer, it will not connect to my Data USB port (the second port).  it is the exact same problem I see on the forum by Nayab Khan.   Both Silicon Labs com ports (3 and 4) are working.  They both work fine when using mmWaveStudio.  

Thanks for continued support!

Larry

Hello Larry,

mmWaveStudio + DCA1000 is for recording unfiltered, unprocessed, dumped ADC data straight from the buffer. This data is used to create custom processing algorithms of one's own in order to get a detection matrix most akin to the environments expected. It is example such as Out of Box demo and 3D People tracking that has our processing code on it that outputs point cloud, tracking information, object classification, etc. To use the mmWave Demo Visualizer, you need to set the device's switches to flashing mode, flash the Out of Box demo binary, then set the device's switches to functional mode. What I imagine is that your device's switches are wrong if you haven't changed them since doing the DCA1000 capture.

I also recommend using the Applications Visualizer which can be found in the Radar Toolbox to get an interactable 3D window of the pointcloud.

https://dev.ti.com/tirex/explore/node?a=1AslXXD__2.00.00.06&node=A__AOFxUnA4gLo7lRDXedw8XQ__radar_toolbox__1AslXXD__LATEST

Best Regards,

Pedrhom

Pedrhom,

Thanks for the replay.  You are correct, the switches on the DCA1000 are the same as when I use mmWaveStudio.  I will do that change.  Now, I have some quite different questions.  I want to be able to measure polarization of return data on the IWR6843, but maybe not the AOP version.  I have read that the patch antennas are linearly and vertically polarized.  I assume the tx antennas are also linear and vertical.  But, isn't it true that when doing beam steering, changing the phase between the tx antennas also changes the polarization to something different.  At 90 degrees it goes to circular.   Otherwise, I believe elliptic.  Is it possible to get a patch antenna that has Rx antennas that are linear but orthogonal, so I can sense differences in amplitude based on polarization differences?  Thanks in advance.

/Larry

Hello Larry,

Sorry for the delay, since this question is a very different topic from the initial question, could you start a new thread? I'll ensure someone will get back to you on that one with 24 hours.

Best Regards,

Pedrhom