AWR2243BOOST: MIMO lua scripting template

Ishita,

The MIMO script in cascade location seems to be compatible with TDA capture card. Which DCA1000 script is the closest to a MIMO configuration?

Thanks,

Daniel

Hello Daniel,

As I said, there doesn't exist any specific script for your usecase as such but one thing you can probably do is take reference for the chirp/frame configuration part from the Cascade MIMO script and the DCA1000 configuration commands (also the rest of channel config) from DataCaptureDemo_xWR.lua, 

Regards,

Ishita

Can you clarify if the Cascade MIMO script (Cascade_Configuration_MIMO.lua) is for a TDM or BPM MIMO?

Daniel

Thanks.

Can you also send reference for the APIs in lua scripts, e.g. ar1.ChirpConfig() 

Looking for the input params.

Thanks,

Daniel

Hello Daniel,

- The APIs used in the script can be found in the mmWave Interface Control Document i.e. ICD that is there in mmWave DFP Package. (Although the name is slightly different, but you will be able to locate them using the basic function of that API)

For eg. for ar1.ChirpConfig(), search for "ChirpConfig" in the ICD.

-Alternatively, there’s one other feature available for this in mmWave studio called as “help”.

For the help feature, click on option "lua shell" in the view tab of mmWave Studio and type “help <API>".

For eg. Type "help ar1.ChirpConfig()" in the lua shell, and you'll get a detailed description of this API. 

Also, please click "This resolves my issue" button, if your query is answered.

Thanks & Regards,

Ishita

Ishita,

The Tx antenna spacing on AWR2243BOOST seems to be \lambda which is twice as that for receiver spacing. In this case the 4 times distance toward the phase configuration of (0, w, 2w, 3w, 4w, 5w, ...) presented in the MIMO Radar document Figure 5, won't be valid. Is this a correct understanding about antenna spacing on the BOOST?

Daniel

Hello Daniel,

Figure 5 in the MIMO radar document is just a reference example to demonstrate how MIMO radar works and its principle. Figure 5 achieves the same granularity with MIMO concept as what was demonstrated by Figure 4 with less number of antennas.

Regards,

Ishita

Okay, then what is the phase-antenna mapping for the Rx/Tx config of the current AWR2243Boost board?

Hello Daniel,

As explained in section 3 of the document, the phases can be derived for this usecase.

The difference here is that if distance between RXs is d, then it will be 2d between TXs, and hence the phase at each RX would be (0,w,2w,3w), (2w,3w,4w,5w) (considering 2TX are transmitting at a time).

(Please read the document carefully, the part to derive the phase difference is very well explained)

Regards,

Ishita

Ishita,

I understand the principal of virtual antenna explained in section 3 of the Radar MIMO document. I found it mismatching with the BOOST board though. Is there any document which explains the phase analysis for this particular use case?

My question was that an antenna configuration of 12 virtual antenna seems not to be the case for BOOST, as some phases are duplicating. Will the size of angular FFT be 12 as claimed extensively throughout the documents of BOOST? If not, how can the duplicate phases be efficiently addressed in the FFT?

Hello Daniel,

Antenna configuration of AWR2243BOOST is the same as AWR1843BOOST.

So you can refer the mmwave SDK doxygen document which explain the virtual antenna where there is no overlap in the azimuth virtual antenna.

file:///C:/ti/mmwave_sdk_03_04_00_03/packages/ti/demo/xwr18xx/mmw/docs/doxygen/html/index.html

file:///C:/ti/mmwave_sdk_03_04_00_03/packages/ti/demo/xwr18xx/mmw/docs/doxygen/html/coordinate_geometry.png

Could you refer above path (install mmwave SDK 3.4 first).

 And there you can refer the processing chain documentation for your query.

Regards,

Jitendra