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CCS/IWR1443: the RX chanel in vitalsigns demo

Edward Fangc
Intellectual 330 points
Part Number: IWR1443

Tool/software: Code Composer Studio

Hi, I Have two questions as below

1.The vitalsigns demo show that the RX channel configuration is 15,meaning four recieve antennas are used,but I find that only one RX is used during range FFT precedure, which RX channel is choosed to do range FFT? I was intend to change，how shoud I do?

2. what does this code mean,  uint32_t *tempPtr = mmwRadarCube + (RX_CHANNEL_PROCESS_VITALSIGNS - 1);   only RX4 chanel is choosed ?

  • 0
    TI__Guru 50240 points
    Hello Chaoyang,

    I've assigned your question to an IWR team member. Someone should have an answer for you shortly.


    Cheers,
    Akash
  • 0 in reply to Akash Gondalia
    TI__Guru 50240 points
    Hello Chaoyang,

    Apologies for the delay.

    For question 1 I can confirm that only one Rx and Tx each are used for implementation. This is because we are looking for a concentrated point detection in this demo rather than multiple objects throughout a scene. Just because all four Rx Antenna are enabled doesn't mean all four are used. In this instance only the 4th Rx Antenna is used since it is closest to the 1st Tx Antenna which is also the only Tx Antenna used.

    For question2, again as per the above response only the 4th Rx Antenna is used.


    Cheers,
    Akash
  • 0 in reply to Akash Gondalia
    Intellectual 330 points
    Hello

    Before you reply, I have debugged my demo code in order to confirm the actually signal processing Rx channel. Just as your reply, only one Rx and Tx each are used for implementation. The 1D FFT can be done in Hardware accelarator in any Rx channel and the 2D processing channel is choosed according to the channel specified earlier.
    Thanks very much.