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AWR2243BOOST: AWR2243 cascading problem

Gmsy Bryant
Expert 1650 points
Part Number: AWR2243BOOST
Other Parts Discussed in Thread: AWR2243

Hello,TI's engineer,

     I meet a problem when i calculate the Rmax throuth the radar equation,I use the AWR2243 cascading.I find the datesheet that note the Pt is 13dbm.So can I understand two AWR2243 cascading's Pt is 3dB more than one AWR2243 ?

Looking forward to your reply

BR

Bryant

  • 0
    TI__Guru*** 147964 points

    Hi,

    Please let me check with systems team.

    Will provide you an answer before end of the week

    thank you

    Cesar

  • 0 in reply to Cesar
    TI__Guru*** 147964 points

    Hi,

    There is one thing I wanted to confirm.

    Is the use case MIMO (1Tx enabled at a time) or Beamforming (all TX enabled simultaneously)?

    If it is MIMO, Pt is the same

    Thank you

    Cesar

  • 0 in reply to Cesar
    TI__Guru*** 147964 points

    Hi,

    For the case when several Tx are enabled simultaneously, here is the theoretical calculation:

     Assuming the waves from all the TX perfectly add to each other in phase, then their voltage would just add up. Hence the power increase with N Tx would be 10*log10(N). For 3 TX it would be 10*log10(3) = 4.77 dB. Hence you get 13+4.77 = 17.77 dBm .

    You can compute for the expected Tx that will be enabled simultaneously

    This is the theoretical max power, if the waves do not perfectly add up the power would be lower.

    Thank you

    Cesar

  • 0 in reply to Cesar
    Expert 1650 points

    Thanks a lot for your reply.

    So I can assume that the two-piece awr2243 cascading scheme is not simply power adding?It has to do with how the antenna is used afterwards, right?

    At the same time,I have another question.Two awr2243 cascading scheme's  Rx Noise Figure is also 12dB or two-piece adding(12+3=15dB)?

    BR

    Bryant

  • 0 in reply to Gmsy Bryant
    TI__Guru*** 147964 points

    Hi,

    No the Rx noise per channel is the same for an increased number of Rx such as a cascade system

    thank you

    Cesar