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AWR6843AOP: Is it possible to use beam-forming to do zone detection (one zone by one zone) on In-Cabin's Child-Present-Detection ?

TC Chou
Prodigy 200 points
Part Number: AWR6843AOP

Dear Sir,

We are implementing the application of  In-Cabin's Child-Present-Detection.

In order to avoid the related radar signal interference which we meet currently, we would like to use beam-forming to do zone detection (one zone by one zone).

That's to say, we want to change/focus all TXs direction on the same Seat. For example, focus on  [Seat No.1] -> after 3 secs -> change to [Seat No.2] ->  after 3 secs -> change to [Seat No.3] ->  after 3 secs -> change to [Seat No.4] ->  after 3 secs -> change to [Seat No.5] , then repeat to focus on [Seat No.1].

Before our implementation, we want to confirm whether TI mmWAVE experts think it's a good idea ? Does it have any drawback/side-effect or any issue which AWR6843AOP can't meet this target ?

Many thanks for your help.

Sincerely,

TC.Chou

  • 0
    TI__Mastermind 36615 points

    Hi, TC.Chou:

    Honestly, we have not found any benefit of using TX beamforming instead of TDM and receive beamforming.  When apply TX beamforming, you only have 4 RX antenna for angle estimation; while in TDM case, we can apply RX beamforming with 12 visual antennas.   If it is a SNR limiting case, BPM kind of increase the SNR by 3dB comparing to TDM.   But we do not see any benefit to improve angle resolution.  

    But this experience is limited with TI EVM/antenna design, and it is not conclusive.  We are also curious about in what condition, TX beamforming can really help. 

    Best.

    Zigang

  • +1 in reply to zigang Yang
    Prodigy 200 points

    Hi Zigang,

    Many thanks for your information. We got it.

    Sincerely,

    TC.Chou