AWRL1432: Demo of Interference Mitigation block in HWA

Hey Chris,

Unfortunately, we don't have demo code for the interference mitigation block in the HWA. Instead, I would recommend looking over Sections 10.2.1.2 Interference Mitigation and 10.2.1.2.2 Interference Statistics from the xWRL432 TRM which does a good job outlining the main factors of the interference mitigation block. The INTF_THRESH_EN, THRESH_MAG/THRESH_MAGDIFF, and INTF_ZERO_MODE are mapped to the fields of the interfLocalize struct and INTF_STATS_RESET_MODE is mapped to interfStat struct - both under <MMWAVE_LSDK_INSTALL_DIR>/source/drivers/hwa/v0/hwa.h. These structs are accessible through the preProcCfg struct of the paramConfig passed using HWA_configParamSet.

Regards,

Kristien

Kristine,

Does TI has plan to make an demo to use HWA interference feature? If yes, when it will be ready?

Thanks,

Chris

Hey Chris,

There are currently no plans to make a demo that uses the HWA interference feature for low-power devices. The OOB demo for AWR2944 does use an HWA interference block, but its configuration differs compared to the HWA interference block used by low-power devices. As a reference, the following interference configuration is used in the OOB demo for AWR2944, but please note this may not work as intended on low-power devices.

preProcCfg.interfLocalize.thresholdEnable = HWA_INTERFERENCE_ENABLE
preProcCfg.interfLocalize.thresholdMode = HWA_INTERFERENCE_THRESH_MODE_MAGDIFF
preProcCfg.interfLocalize.thresholdSelect = HWA_INTERFERENCE_THRESH_SELECT_BUILTIN
preProcCfg.interfStat.resetMode = HWA_INTERFERENCE_STATS_RESET_HOLD

Regards,

Kristien

Hi Kristien,

Regarding the register position of these values of 1432 anti-interference, can you give a similar reference to 2944, which can be easily modified at the bottom. At present, we see that the HWA document has a register description, but it cannot correspond to the code (or could you tell how to correspond to the code modification).

The relevant screen pictures are as follow:

Best,

Yitong.

Hey Jin,

The HWA_PreProcessing struct may need to be updated for xWRL1432. I need to confirm with the design team whether this block/driver should be the same between xWR2944 and xWRL1432.

Regards,

Kristien

Hi Kristien,

Thanks a lot. Could you please help ask when the design team can give us a reply? Will their SDK update this feature?

Best,

Yitong.

Hey Jin,

I've already reached out to the relevant design team members and SDK members. I will update you once I get a reply back from them.

Thank you for your patience,

Kristien

Hi Kristien,

All right, thanks a lot and hope for your reply.

Best,

Yitong.

Hi Kristien,

Yes, we have noticed this difference, and hope for the response from the SDK team.

Best,

Yitong.

Hi,

Just wanted to follow up to let you know we'll post when we have more feedback.

Thanks,

Clinton

Hi Kristien，

Excuse me, we would like to further confirm (1) the parameters previously shared you mentioned, are the items in the above reply (as shown in screenshot)? But we can’t find these structs in 1432.

(2) how to test the parameters previously shared.

Best,

Yitong.

Hey Jin,

If you are referring to the interfMitigation struct, then there should be no struct for 1432 needed. If you are referring to the interfLocalize and interfStat structs, then these are needed to utilize interference mitigation.

For testing the parameters previously shared, since there is no example code, this will be up to the end user to test and implement for the time being. However, one potential area to start would be to add interference mitigation into the FFT portion of the HWA range processing chain - i.e., adding interfLocalize and interfStat to the range FFT portion of rangeProcHWA_ConfigHWA under <MMWAVE_LSDK_INSTALL_DIR>/source/datapath/dpu/rangeproc/v0/rangeprochwa.c. 

Finally, could you tell us what end application you intend to use interference mitigation in? Depending on your answer, I might be able to find someone who can comment more on this issue.

Regards,

Kristien

Hi Kristien，

We notice that HWA_configParamSet can only support configuration of these three variables as shown below, does it mean that the interference can only match these few, which cannot be configured as the documentation says.Or are there any new documents to update to us.

Best,

Yitong.

Hey Jin,

The interference mitigation parameter configuration only requires those three parameters for setup. As mentioned before, the values for these fields and what they do can be found under Sections 10.2.1.2 Interference Mitigation and 10.2.1.2.2 Interference Statistics from the xWRL432 TRM. You can also look at the typedef struct defined under <MMWAVE_LSDK_INSTALL_DIR>/source/drivers/hwa/v0/hwa.h and look for HWA_INTERFERENCE macros near the top of the same file.

Regards,

Kristien

Hi Kristien，

The above registers are also masked in MMWAVE_L_SDK_05_03_00_02. Does it indicate that this SDK does not support anti-jamming and needs to be upgraded to MMWAVE_L_SDK_05_05_00_02, as shown below:

Best,

Yitong.

Hey Jin,

I'm not sure what anti-jamming is in this context, but as stated before, the interfLocalize struct is used for interference mitigation. If possible, could you clarify what "anti-jamming" is? 

Regards,

Kristien

Hi Kristien，

Sorry for the lack of clarity, "anti-jamming" is represented  for interference mitigation.

The above registers are also masked in MMWAVE_L_SDK_05_03_00_02, which are commented out. Does it indicate that SDK 5.3 does not support interference mitigation and needs to be upgraded to MMWAVE_L_SDK_05_05_00_02, as shown below:

Could we use these interfLocalize structs used for interference mitigation in SDK 5.3 as well?

Best,

Yitong.