• State Resolved
  • Locked Locked
  • Replies 7 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 3440 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

IWR1443: radar angle estimation and transmit signal setting

Eric Wolf
Prodigy 120 points
Part Number: IWR1443

Hello,

Thank you for answering my question

I am currently using IWR1443BOOST in combination with TSW1400 data capture card to evaluate the elevation beamforming performance .

In the 'MIMO radar' document(http://www.ti.com.cn/cn/lit/an/swra554/swra554.pdf ),there are two types of MIMO radar transmissions, one for TDM-MIMO and the other for BPM-MIMO.

I have the following questions:
1, in the measurement of object angle and the angle resolution experiments, I use two transmit antennas、 four receiving antenna settings. The transmission signal is 128 frames, one frame includes 255 chirps,
I set up the following in the radio stduio sensor config tab, is this set  correct?


2, as above using two transmit antennas, how does it transmit the signal? Is it in the form of TDM or BPM? In the above measurement angle resolution test， what form should be used and how to set parameters?

3、In the data bin file, the data is how the order of the arrangement? Intend to use matlab language to deal with their own data files。

Thank you,

Eric Wolf

  • 0
    Prodigy 120 points
    Sorry，this is my first time to use this forum to ask for help.The missing picture in this
  • 0
    TI__Mastermind 21025 points
    1) I set up the following in the radio stduio sensor config tab, is this set correct?

    Yes it looks like the defaults except for the frame parameters. With that high of a Sample Rate and the max Chirps, you may overflow the radar cube memory.

    2) how does it transmit the signal? Is it in the form of TDM or BPM?

    Good question. Typically it is TDM, since the chirps are processed in sequence. You only have a single chirp defined. As described in SWRA554, you will need to create a second chirp that is 180' out of phase of the first chirp for BPM. Note that if you define 2 chirps, you will need to cut the chirp loops in half.

    3) In the data bin file, the data is how the order of the arrangement?

    How are you planning to do this - using Radar Studio or MMW (out of box) demo? For Radar Studio, you will need to flash the MSS R4f ARM processor with the Radar Studio image, which performs specific SPI handshaking with RS on the PC. I believe you can find both formats by searching this forum.
  • 0 in reply to db_woodall
    Prodigy 120 points

    Hello db_woodall

    Thank you so much

    I have read the SWRA554.PDF.in its page 9 , it introduces how to configure a device in MIMO mode, but I still confused about configuring TDM in Radar Studio.

    For IWR1443+DevPack+TSW1400,after seeing the mmWave+TSW1400 training video，I am sorry that I still do not understand the specific process to configure TDM（training.ti.com/mmwave-sensor-raw-data-capture-using-tsw1400-board）

    if I want to set 2 Tx antennas working alternately and they  emit the same  chirp signal. How should I specifically set up ‘SensorConfig’ in radar studio(Use default settings in Profile tag)？

  • 0 in reply to Eric Wolf
    TI__Mastermind 21025 points

    If you look at the example configurations in the SDK's mmw demo, they typically define two chirps that are identical except for the Tx antenna that is enabled.  The frame config then specifies them via the StartIdx and EndIdx, and the number of Chirp loops is set to half of the total number of desired chirps.  So the frame will consist of the two chirps alternating "chirp loop" times.  In Radar Studio, click the "Manage Chirps" button to configure two chirps.  You will notice the "TXn Enable" fields. Chirp 0 would enable TX1 only, and chirp 1 would enable TX2 only (if you've enabled TX1 and TX2 on the parent screen).

    For reference, you can find the mmw profile configs here:

    C:\ti\mmwave_sdk_01_00_00_05\packages\ti\demo\xwr14xx\mmw\profiles

    and the description of the parameters are found in section 3.5 of the mmWave SDK's user guide (in the docs folder).

      -dave

    (BTW, BPM is configured using radar studio in the BPMConfig tab/screen).

  • 0 in reply to db_woodall
    Prodigy 120 points

    With regard to your answer

    I have found the mmw profile configs in file path that you said.but Inside some of the parameters in the profile.cfg  how to correspond to radar studio is not very clear.

    Can you help me to determine if it is set up correctly?

    Question1:

    in radar studio,If I want to set 2 Tx working alternately, and radar transmits signal with 32frames and 256 chirps in one frame.

    I need to set 'Start Chirp for Cfg'=0, 'End Chirp for Cfg'=0, and TX Enable for current chirp = TX1; then, 'Start Chirp for Cfg'=1, 'End Chirp for Cfg'=1, and TX Enable for current chirp = TX2. Then in Frame tag, I need to set 'Start Chirp TX'=0 and 'End Chirp TX'=1, which means in one frame, chirp with TX1 and chirp with TX2 work alternately.

    1、

    2、

    3、

    Is this setting right？

    Question2:

    In Chirp tag, if I set 'Start Chirp for Cfg'=0, 'End Chirp for Cfg'=1, or 'End Chirp for Cfg' bigger than 0 (say 100), is this setting legal, and what does this setting mean?

  • 0 in reply to Eric Wolf
    TI__Mastermind 21025 points

    I'm not quite sure what you are showing. I believe you need to click on Manage Chirps and fill in the first two entries, then in the "Frame" box, use Start Chirp Tx=0, End Chirp Tx=1, No of Chirp Loops 128.

  • 0 in reply to db_woodall
    Prodigy 120 points

    Thank you so much 

    I will use this method to set TDM