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IWR1843BOOST: Ask for device selection advice

user5197472
Prodigy 130 points
Part Number: IWR1843BOOST
Other Parts Discussed in Thread: IWR1443, IWR1642, AWR2243, IWR1843, IWR6843AOPEVM, IWR6843


I am aware of some statements related to products after checking in the forum. May I list some of them and have them verificated?
S1) AWR series fits some road/car regulation with more strict working conditions, while no obvious performance gap is found when compared to the same product number in IWR series.
S2) IWR1443 and IWR 1843 has 3 TX, which enable them to form 3-D detections.
S3) IWR1642 and IWR 1843 has a DSP on chip, which enables them to do some clustering and tracking algorithm. As a result, the TLV list can be generated after detection.

And here are some more specific questions related to my research. Could you please give me some advice on device selection(which part number suits the best)?
Q1) May I know that is there any improvement in resolution or detect object numbers for AWR2243 single-chip test board(boost) compared to xWR1443? I have seen some difference in ADC sampling rate or Interface using the compare function on TI website. And I also know that AWR 2243 chip can be used for a cascade design. May I know if there is some more difference that I should notice?

Q2) I am tending to use IWR1843. May I know if I can understand as that xWR1843 combines the advantage of xWR1443 and xWR1642. Since I am working on object tracking, I am wondering if there is any drawbacks to use xWR1843 instead of xWR1642? Is it a wise choise to use xWR1843 for short range(0.5~10 meters) multi object tracking?

Q3) I am currently working on object tracking using ROS Melodic on ubuntu 18.04. I have found some useful code IN "Inductrial Toolbox 4.4.1/Labs/Robotics/ROS Point Cloud Visualizer". It suggects using IWR6843AOPEVM. Since I have tried some older vision on IWR 14443 BOOST and worked well. May I know if I can compile and run it in ROS when connected to a IWR1843/AWR2243 after some minor revision? In other words, does the data_port of IWR1843/AWR2243 output similiar data stream as IWR1443?

  • 0
    TI__Mastermind 23725 points

    Hello,

    Thank you for your interest in mmWave devices.  We will try and respond  in multiple targeted responses.

    In the future we would recommend you to file separate tickets in order to help you better.

    Response to your statements below:

    S1) AWR series fits some road/car regulation with more strict working conditions, while no obvious performance gap is found when compared to the same product number in IWR series.

    TI:That is true. The AWR devices are targeted towards Automotive Applications and meet the Operating conditions for such applications.


    S2) IWR1443 and IWR 1843 has 3 TX, which enable them to form 3-D detections.

    TI: IWR1443 and IWR1843 have   4 Receivers and 3 Transmitters.

    3d vs 2d  angle  information can be extracted based on the Antenna Layout .  Please see how Angle is estimated in mmWave Training series.


    S3) IWR1642 and IWR 1843 has a DSP on chip, which enables them to do some clustering and tracking algorithm. As a result, the TLV list can be generated after detection.

    TI: IWR1642 and IWR1843 have an integrated DSP core on the device which provides more Signal and algorithm processing  capabilities.

    Having said that clustering and tracking can also be done on Cortex processor with limited processing.

    Thank you,

    Vaibhav

  • 0 in reply to Vaibhav Mahimkar
    Prodigy 130 points

    Thanks for your quick response, Vaibhav. These explanations are helpful.

    Looking forward to the coming response about my device selection questions. Thanks in advance.

    Best,

    Zhu

  • 0 in reply to user5197472
    TI__Expert 7510 points

    Zhu:

    Q1) May I know that is there any improvement in resolution or detect object numbers for AWR2243 single-chip test board(boost) compared to xWR1443? I have seen some difference in ADC sampling rate or Interface using the compare function on TI website. And I also know that AWR 2243 chip can be used for a cascade design. May I know if there is some more difference that I should notice?

    [CD] >>If you want to understand what goes into range, velocity, or angular resolution then I would go watch the following video series on FMCW radar:

    Once you have a basic understanding of the parameters at play I would suggest going the following pages for the AWR2243, IWR1443, and AW1443 to review the technical documentation that is provided to is any particular differences between the two will effect your application.

    Q2) I am tending to use IWR1843. May I know if I can understand as that xWR1843 combines the advantage of xWR1443 and xWR1642. Since I am working on object tracking, I am wondering if there is any drawbacks to use xWR1843 instead of xWR1642? Is it a wise choice to use xWR1843 for short range(0.5~10 meters) multi object tracking?

    [CD] >> With regards to the object tracking for the most available and up to date resources I would suggest IWR1843/IWR6843. The major difference between the IWR6843 vs IWR1843 is what frequency band they operate in. This difference will not effect performance in multi object tracking. What will effect performance is how the device is configured. Please refer to training resources.

    Q3) I am currently working on object tracking using ROS Melodic on ubuntu 18.04. I have found some useful code IN "Inductrial Toolbox 4.4.1/Labs/Robotics/ROS Point Cloud Visualizer". It suggects using IWR6843AOPEVM. Since I have tried some older vision on IWR 14443 BOOST and worked well. May I know if I can compile and run it in ROS when connected to a IWR1843/AWR2243 after some minor revision? In other words, does the data_port of IWR1843/AWR2243 output similar data stream as IWR1443?

    [CD]>> Once again I would suggest using the IWR6843 as suggested because the resources that are available directly support that device. Not saying that older devices won't work, but there are not as many resources.All of the devices that you listed will send their data to your Linux machine using UART. What is sent depends on the firmware, and what is capable of being sent depends also on the firmware, but also the unique constraints that the different devices have.

    Overall I would really dive deep into the technical documentation for all of the devices that you are interested in and cross reference that with "must haves" for your application. I would also take into available resources into consideration as well.

    Best regards,

    Connor Desmond

  • 0 in reply to Connor Desmond
    Prodigy 130 points

    Thanks a lot Desmod. I found that IWR1843 boost  and IWR6843 OPEVM both have 4rx,3tx, on chip dsp, fft accelerator, MCU.

    So I guess the main difference in hardware seems to be their working frequency, which relates to the range resolution, right? Also, IWR6843 is smaller in size and has a more frequent recent update in firmware and resources?

  • 0 in reply to user5197472
    TI__Expert 7510 points

    Dear Zhu:

    1. So I guess the main difference in hardware seems to be their working frequency, which relates to the range resolution, right?

    [CD] >>The range resolution is related to the chirp bandwidth. The chirp bandwidth for both the IWR6843 and IWR6843 is 4GHz.. 77 to 81 GHz and 60 to 64GHz respectfully.

    2.Also, IWR6843 is smaller in size and has a more frequent recent update in firmware and resources?

    [CD] >>The IWR6843 will have more frequent update in firmware and resources.

    Best regards,

    Connor Desmond