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IWR6843: Speed and position detection

BO
Genius 12760 points
Part Number: IWR6843

Is it possible to make these two parameters feasible (as per requirement) if we reduce the max range and max speed of the elevator cabin.

  • Velocity: 0.63 m/s  to 3 m/s (or less)
  • Range    : < 100 meter

If yes, then please provide details for same.

Parameter                Value      Feasibility       Feasible Value
Max. Range       Feasible  
Range Accuracy                ± 3 mm       Feasible  
Range Resolution                250 mm       Feasible  
Max. Velocity         Feasible  
Velocity Accuracy         Feasible  
Velocity Resolution               1 mm/s       Feasible  

Regards,
Bernd

  • 0
    TI__Mastermind 40445 points

    HI, Bernd:

    Do you mean you want to keep the Range resolution, Velocity resolution the same, But change the

    • The maximum Velocity to 3 m/s (or less)
    • The minimum Velocity to 0.63m/s
    • The maximum Range  to 100 meters

    I am not say we can do it, I am just trying to understand your request first.

    Best,

    Zigang

  • 0 in reply to zigang Yang
    TI__Mastermind 40445 points

    Hi,

    Please reply the question on the thread, otherwise, I would think your problem get resolved and I will close the thread.

    Best,

    Zigang

  • 0 in reply to zigang Yang
    TI__Genius 12760 points

    Zigang,

    customer promised to proceed with this thread asap.

    Regards, Bernd

  • 0 in reply to BO
    Prodigy 50 points

    Hi Team,

    Please refer below comments in blue.

    Do you mean you want to keep the Range resolution, Velocity resolution the same, But change the

    ·       The maximum Velocity to 3 m/s (or less)

    ·       The minimum Velocity to 0.63m/s

    ·       The maximum Range  to 100 meters

    I am not say we can do it, I am just trying to understand your request first.

    Yes. Please match the requirements of range resolution & velocity resolution.

    To achieve this, you can change other parameter. 

    My question is , what are the possible limt values for Velocity and Range. 

    Thanks & Regards,

    Vivek Gore

  • 0 in reply to Vivek Gore
    TI__Mastermind 40445 points

    HI, Vivek:

    Since you have opened a new e2e thread.  I am closing this old one. Please use the new one for your question.

    Best,

    Zigang

  • 0 in reply to zigang Yang
    TI__Genius 12760 points

    Hi Zigang,

    please keep this thread open and close the new one as it contains the more comprehensive and latest information.

    Regards, Bernd

  • 0 in reply to BO
    TI__Mastermind 40445 points

    Sure. Will do that.

    Best,

    Zigang

  • 0 in reply to Vivek Gore
    TI__Mastermind 40445 points

    Hi, Vivek:

    Given the range resolution, the RF bandwidth is decided.  Range resolution of 25cm => RF Bandwidth is 600MHz.  So your range resolution of 25cm is not a problem.

    Given the Vmax, you can increase the number of chirps to get to your velocity resolution.  There is no limit for the sensor configuration in terms of number of chirps to support.  But you will be limited by the data cube memories.      

    The max Range = rangeFFTSize * rangeResolution,

    The max Velocity = DopplerFFTSize * velocityResolution

    The radar cube size in byte = rangeFFTSize * DopplerFFTSize * 4 * numTxAnt * numRxAnt

    We have a limit on the radarCube memory for about 768KHz.   So you can compute the limitation now.

    For more information about "radarcube", you can search it on SDK user guide.

    Best,

    Zigang