AWRL6432: Cfar check rule at the edge of range index

Ann Lu

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

4 months ago

0 zigang Yang 4 months ago

TI__Mastermind 36725 points

HI, there:

Please check the TRM document section 10.2.2.3.

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

Best,

Zigang

0 Ann Lu 4 months ago 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 zigang Yang 4 months ago in reply to Ann Lu

TI__Mastermind 36725 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 Ann Lu 4 months ago 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 zigang Yang 4 months ago in reply to Ann Lu

TI__Mastermind 36725 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

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AWRL6432: Cfar check rule at the edge of range index