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DCA1000EVM: DCA1000EVM

Ozan Dogan
Prodigy 40 points
Part Number: DCA1000EVM

I have the DCA 1000, with AWR 1642BOOST.
I have two questions:
1. Can I change the chirp parameters in a frame in real time? For i.e, after estimating some parameters by using the previous data, can I change the chirp parameters of the succeeding frame?
2. Can I change the trigger time of a chirp within a frame? For i. e, a frame includes 256 chirps and after 10 chirps, an estimation of the chirp triggers is made. While this estimation, for i.e., 10 more chirps are transmitted. I want to apply the new offset trigger, for the rest 256-10-10 chirps. Is this possible?
Best Regards,
Ozan

  • 0
    TI__Mastermind 31680 points

    Hello Ozan,

    1. For this purpose, you could use two different chirp profiles in a single frame which is the legacy frame configuration or you could also switch to Advance Frame Configuration. Please refer to Chapter 11.1 "Advance Frame Configurations" in the mmWave_DFP_user_guide.pdf which comes as a part of the DFP package (docs directory). There you can implement various kinds of chirps and frame configurations together. 

    2. Yes, this is possible. Look for "AWR_CHIRP_CONF_SET_SB" API in the mmWave ICD to change the delta start time of each chirp.

    Hope the information was helpful.

    Regards,

    Ishita

  • 0 in reply to Ishita Kochar
    Prodigy 40 points

    Hello Ishita,

    Thank you for the rapid response. Can I trigger a chirp within a frame by using mmWaveStudio or do I require the CCS? 

    Bests,

    Ozan

  • 0 in reply to Ozan Dogan
    TI__Mastermind 31680 points

    Hello Ozan,

    Yes, mmWave studio will serve your purpose.

    Regards,

    Ishita

  • 0 in reply to Ishita Kochar
    Prodigy 40 points

    Dear Ishita,

    Thank you for your response.

    Maybe I am not quite clear. Let me clarify. Suppose that there are 512 chirps within a frame. After transmission of the 10 chirps, an interference detection algorithm will be processed. During this time, maybe 10 more chirps will be transmitted (wasted). The output of the interference detector algorithm is the chirp trigger timing. Let me repeat: The trigger time of the chirps for the rest of the chirps (512-20=492 chirps) are calculated after the transmission of 20 chirps in the beginning of the frame.  In mmwavestudio, what I understood is that one sets the trigger time initially and cannot change in runtime. How can I embed my interference detector algorithm to the mmwave studio?

    Bests,

    Ozan

  • 0 in reply to Ozan Dogan
    Prodigy 40 points

    Hi again,

    In another TI forum discussion*, as I understand, the chirp trigger modification within the frame duration is impossible and can only be achieved for the next frame. What I want to do is to change the trigger time of some of the succeeding chirps of a frame after that frame is started.

    *

    Bests,

    Ozan

  • 0 in reply to Ozan Dogan
    TI__Mastermind 31680 points

    Hello Ozan,

    Sorry for the delayed response.

    -So one way is you can preprogram different chirps before hand. This can be done in two ways....

    1. Either using advance Frame Config which I mentioned earlier as well.
    2. Or you could also preprogram chirps with different ADC start times in a single frame in Legacy config (i.e. when not using Advance frames).

    -The thread you're referring to is pointing towards Dynamic chirp configuration scenarios where different chirp parameters need to update on the go. Here if you change a particular chirp parameter, the change will be reflected in the next frame. (This is because, the properties for a chirp is already configured and sent to the device just before the start of every frame, hence any change you make will be transmitted to the device just before the start of the next frame)

    Hope the information was useful and clear. Please let us know if you need any further info.

    Regards,

    Ishita