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AWR2243: Question about cascade scenario

Cemal T
Prodigy 10 points
Part Number: AWR2243

Tool/software:

Good day all!

I have a question about the AWR2243 cascade working scenario.

My first question: There are 3 TX and 4 RX in each AWR2243. In a network consisting of 1 master and 3 slaves, for example, how and for how many chirps the 1st TX in the 1st slave will be active, how the 2nd TX and 3rd Tx will be active respectively, with which settings are set?

Second question: All TXs in the 1st slave were activated and it is time for the Txs in the 2nd slave to be active. How are the settings related to this?

Maybe I have a bit mixed something. Basically, although all slaves receive the SYNC_OUT signal from the master at the same time, how do they activate TXs at different times? I want to understand architecture and logic behind.

  • 0
    TI__Expert 4480 points

    Hi Cemal,

    It depends on the configuration given by you. and you can go through this document for more understanding.

    MIMO Radar (Rev. A) (ti.com)

    BR,

    Animesh Anand

  • 0 in reply to Animesh Anand
    Prodigy 10 points

    Hi Animesh Anand, 

    Thank you for your reply. Actually I have already read that document. I will give an example.
    According to picture there is 2 devices. With first chirp Device 1's Tx1 is active. With second chirp Device 1's Tx2 is only active.After 3 chirp, with 4 th chirp Device 2's Tx1 is only active. I got MIMO logic.
    My questions are :
    1. Is there any way to start first active device as "Device 2" and activate Device 2's Tx1. Assume there will be 4 Device and I want to activate Device 4's Tx1 with 4th chirp. If this configuration possible How system can Device awares that it should activate it's Tx one by one.

    2.Is there any way to keep active these Tx by following couple of chirps. Assume they will active following 5 chirps. From chirp 0 to chirp4 Device 1's Tx1 will be active and from chirp 5 to chirp 9 Device 1's Tx2 will be active

    I want to learn how should I set these settings and want to learn how system works at behind.

    Thanks in advance

    Picture:
    https://www.imghippo.com/i/lDijw1721973179.png 

  • 0 in reply to Cemal T
    TI__Expert 4480 points

    Hi Cemal,

    For your 2nd question, there is chirp configuration parameter that you need to set for chirping from a particular Tx.

    In the given picture you can see for chirp 0, it will only use Tx1 whereas for chirp 1, it will use Tx3. So, you can set it like that for each set of chirps. For more information about chirp configuration. you can go through mmwave user guide.

    mmwave_mcuplus_sdk_user_guide.pdf

    For your first question,

    Device 1 is the master and Device 2, Device 3, Device 4 are slaves, and you want to send first chirp using Device 2 Tx1 and then second chirp to Device 3 Tx1 and so on. Am I right?

    BR,

    Animesh Anand

  • 0 in reply to Animesh Anand
    Prodigy 10 points

    Hi Animesh, 
    Thank you for your reply. 

    Actually I am asking how specific Device understand it is Device 1 or Device 2 or etc.
    Also question includes : 
    Is it possible to arrange settings like Settings 1 and Settings 2. I could not understand when Device will start activating its Tx antennas.



    When you look at settings 2 Tx order has changed. Is that possible ? 

    Thanks

  • 0 in reply to Cemal T
    TI__Expert 4480 points

    Hi Cemal,

    Let me check with some experts and will get back to you by next week.

    BR,

    Animesh Anand

  • 0 in reply to Animesh Anand
    TI__Expert 4480 points

    Hi Cemal,

    Can you add picture directly to chat instead of link as we are not able to access it?

    BR,

    Animesh Anand

  • 0 in reply to Animesh Anand
    Prodigy 10 points

    Hi, 

    Sorry for delay, here you can find pictures
    This is settings1

    and this is settings2

  • 0 in reply to Cemal T
    TI__Expert 4480 points

    Hi Cemal,

    Thanks for sharing, let me go through it once.

    BR,

    Animesh Anand

  • +1 in reply to Animesh Anand
    TI__Expert 4480 points

    Hi Cemal.

    This is the Lua script for 4 chip cascade configurations. In the following example you can see how they have configured for the given example.

    here you can see the first chirp is coming from device 4 from Tx2. Second chirp is coming from Tx1 and so on for device 4. So, you can set it according to your requirement.

    https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/1023/Cascade_5F00_Configuration_5F00_MIMO.lua

    BR,

    Animesh Anand

  • 0 in reply to Animesh Anand
    Prodigy 10 points

    Hi Animesh, 

    Thank you for help.