AWR1843BOOST: ADC cube with BPM MIMO enabled

vincent fayet1

Part Number: AWR1843BOOST
Other Parts Discussed in Thread: IWR1843BOOST

Hello,

I have a question concerning the BPM mimo with IWR1843BOOST,

Reading the content of linked thread, i think bpm mimo is not implement on DSP inside the demo version.

But if i am using mmwave studio to configure the bpm and get ADC data directly from DAC1000 using LVDS, I will be able to use BPM MIMO, is it right?

If i'm right, i have an other question. Ones i have create the ADC cube for one frame (4Rx,128chirps,256samples), i need to separate the cube cause with BPM MIMO enabled, i have 8 virtuals antenas but i don't see how to do it.

thanks,
Vincent

over 5 years ago

0 vincent fayet1 over 5 years ago

Intellectual 365 points

Sorry but my question is not exactly how to separate datas in order to get the 8 virtuals antennas cause i think we need to do it using S1=(Sa+Sb)/2 and S2=(Sa-Sb)/2 but more about how those data are stored inside raw data from LVDS ?

One in Two chirps inside data raw concerne Sa and the other Sb ? In that case we have to assume that the scene has not changed between Sa and Sb emission

0 Cesar over 5 years ago in reply to vincent fayet1

TI__Guru*** 149104 points

Hi,

Yes, it is possible to configure bpm with mmwave studio.

Please see this thread

Regarding the format of the ADC data, please see the Section 24 in mmWave studio User Guide C:\ti\mmwave_studio_02_01_00_00\docs\mmwave_studio_user_guide.pdf

Here is a short matlab script that reads the raw data format for MIMO with 3 TX

    % radar_data has data in the following format.
    % Rx0I0, Rx0I1, Rx0Q0, Rx0Q1, Rx0I2, Rx0I3, Rx0Q2, Rx0Q3, ...
    % The following script reshapes it into a 3-dimensional array.
    % size(adcOut) = [ADC samples per chirp x Chirps per Frame x Number of virtual Channels]

    len = length(dataChunk) / 2;
    adcOut(1:2:len) = dataChunk(1:4:end) + 1j*dataChunk(3:4:end);
    adcOut(2:2:len) = dataChunk(2:4:end) + 1j*dataChunk(4:4:end);
    adcOut = reshape(adcOut, Chirp_NUM_ADC_sample_size, numTXAnt*4, Chirp_NUM_Chirps);
    adcOut = permute(adcOut, [1, 3, 2]);

Thank you

Cesar

0 vincent fayet1 over 5 years ago in reply to Cesar

Intellectual 365 points

Thanks,

Vincent

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AWR1843BOOST: ADC cube with BPM MIMO enabled