• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 31 subscribers
  • Views 307 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AWR1243: chirp configuration in MIMO TDM

Morteza Varasteh
Prodigy 20 points
Part Number: AWR1243

Hi team, 

I am using AWR1243 in MIMO TDM mode. I have some questions and I appreciate your time for addressing them.

1) When recording data with 3 transmit antennas, is it true that if I set the chirp manager as below, I wont have anything sent on the second and the third antenna?

2) Whether question 1 is correct or not, when I extract the data (frames: 1000, with chirp loop: 33, ADC samples: 384, TX:3, RX: 4) I have a tensor with the following dimension dim(A) = (1000, 99, 384, 4). Focusing on frame 0, is it true that A(0, 0, :, :) are the received chirps samples from TX0 and and A(0, 1, :, :) are the received chirps samples from TX1 and A(0, 2, :, :) are the received chirps samples from TX2 and so on?

3) On the board, is this correct that the elevated antenna is TX1, the left one is TX0 and the right one is TX2?

4) In the chirp manager section, is it correct to leave the parameters marked with blue arrow below equal to zero? shouldnt we choose them according to the chirp configuration? That is for example start freq=77GHz, idle time=7 micro second and so on?

5) In the figure above, is it enough to do the setting for the first three chirps and it will be repeated for the rest of the Frame?

Many thanks again for your response.

  • +1
    TI__Mastermind 26955 points

    Hello,

    1.Yes, that is correct. The TX will not be enabled if set to 0 and you will only receive the RX idle channel data.

    2. Yes, this is correct assuming you have also set the chirp start/end index in the frame config. Below is a snippet from the mmwave studio GUI illustrating a frame with 33 chirps as in your example to demonstrate. 

    3. Yes, that is correct.

    4. Yes, you can leave these as zero if not needed. These are variations in start fequency, etc, that can be applied to a specific chirp if you want it. For example, you could set chirp 1 to have a start frequency variation of 100 MHz from chirp 0. 

    5. Yes, that is correct. It will be repeated for the number of loops you have set in the frame. 

    Regards,

    Adrian 

  • +1 in reply to aozer
    Prodigy 20 points

    Thanks a lot Adrian, great help!