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TIDEP-01024: About how to extend maximum range in TIDEP-01024

user1213293
Prodigy 170 points
Part Number: TIDEP-01024

The TIDEP-01024 design targets the implementation of a wide azimuth and elevation field of view (±70°) and close range (5 m) sensor configuration.

We can detect pedestrian objects within the range to 2 m. and nearly 5 m at specific angles.

Our questions is how to extend maximum range to 20m for pedestrian objects? Maybe we can change the chirp_configs, could you give us some advice for the modification?

  • 0
    TI__Guru*** 138309 points

    Hi,

    I recommend using the mmWave SDK demo for your tests. The reason is that the SDK demo is more flexible and works with a larger variety of chirp configurations.

    http://software-dl.ti.com/ra-processors/esd/MMWAVE-SDK/latest/index_FDS.html

    For pedestrian detection at 20m, first you need to consider if the application requires elevation information or not.

    If the application does not need elevation information than you can create a chirp configuration that used only 2Tx. Since there is no 3x processing, the performance will be better than with 3Tx.

    For 2Tx chirp configuration you can start with

    C:\ti\mmwave_sdk_03_05_00_04\packages\ti\demo\xwr18xx\mmw\profiles\profile_2d_aop.cfg

    The original configuration has a range max of ~8m

    profileCfg 0 77 7 3 39 0 0 100 1 256 7200 0 0 30

    You can increase the range by increasing Fs /S

    • Fs = Sampling Frequency
    • S = Slope of chirp

    Currently, 7200/100 = 720

    We can modify as follows to increase range 3 times ~ 24m

    10000/50 = 2000

    Please try:

    profileCfg 0 77 7 3 39 0 0 50 1 256 10000 0 0 30

    In order to understand how the max range is computed please see this FAQ

    https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1050220/faq-computing-maximum-range-velocity-and-resolution-mmwave-system

    Thank you
    Cesar

  • 0 in reply to Cesar
    TI__Guru*** 138309 points

    One more thing,

    You may also want to increase the Rx gain to increase detection performance:

    The Rx Gain can all even values from 24 to 52

    You can try

    profileCfg 0 77 7 3 39 0 0 50 1 256 10000 0 0 48

    Thank you

    Cesar

  • 0 in reply to Cesar
    Prodigy 170 points

    Thank you for your fast reply.

    How to modify the chirp configuration if we want to increase both range and accuracy performance?  We don't concern velocity and angle.

  • +1 in reply to user1213293
    TI__Guru*** 138309 points

    How do you define accuracy performance? You may have in mind range resolution performance.

    Range Resolution is related to the bandwidth used. The higher the bandwidth the higher the Range Resolution as explained in the FAQ.

    There are may threads related to this question on this forum.

    Please use google search to find out more information as follows

    site e2e.ti.com awr resolution

    site e2e.ti.com awr accuracy

    Thank you

    Cesar