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AWRL6432: Cfar check rule at the edge of range index

Ann Lu
Prodigy 60 points
Part Number: AWRL6432

Tool/software:

Please help to inform us the following setting of cfarCfg about the applied noise window and cfar rule as the range index at 1~11 or 116~127 at this CFAR-CASO case?

chirpComnCfg 8 0 0 256 0 23 0
chirpTimingCfg 38 20 1 12 61.1

cfarCfg 2 8 4 3 0 8 0 0.95 0 1 1 1

For the cfarCfg set the guard as 4 and window as 8, index 1~11 & 116~127 cannot have fully windows data for their one side window are out of the index of 0~127

  • 0
    TI__Mastermind 38155 points

    HI, there: 

    Please check the TRM document section 10.2.2.3.

    https://www.ti.com/lit/pdf/swru599

    Best,

    Zigang

  • 0 in reply to zigang Yang
    Prodigy 60 points

    Sir, Thanks.

    2 further questions need your further help if we apply the following setting at cfg file

    cfarCfg 2 8 4 3 0 10 0 0.95 0 1 1 1

    1. How about the used left/right window size? Is it 8 for both side?

    2. For this non-cyclic setting, if the index 1~11 & 116~127 will have the same window value for all the cases of CFAR-CA, CFAR-CAGO, CFAR-CASO for the other side will not have data will be used? 

  • 0 in reply to Ann Lu
    TI__Mastermind 38155 points

    Hi, Ann:

    You can find all the parameter definition in SDL L users guide (search for cfarCfg)

    file:///C:/ti/MMWAVE_L_SDK_05_04_00_01/docs/api_guide_xwrL64xx/MOTION_AND_PRESENCE_DETECTION_DEMO.html#autotoc_md777

    1) Yes, it is win size is 8 on both size (always the same on both sides)

    2) For non-cyclic setting, for index 0-11, the left noise will be ignored, and right noise will be used.

    for index 116~127, the right noise will be ignored, and only the left noise will be used.

    Best,

    Zigang

  • 0 in reply to zigang Yang
    Prodigy 60 points

    Sir,

    Thanks. For previous item.2 question, does it mean CFAR-CA, CFAR-CAGO, CFAR-CASO will have the same noise average value for only one side data is used, right? 

  • 0 in reply to Ann Lu
    TI__Mastermind 38155 points

    HI, Ann:

    That is correct.  When only one side noise is available, there is no difference between CFAR-CA, CFAR-CAGO, CFAR-CASO.

    Best,

    Zigang