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NIWLANG_HE_LTF_SIZE

NI WLAN Generation Toolkit 17.0 Help

Edition Date: May 2017

Part Number: 373725G-01

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Data Type: int32
Access:read/write
Functions:niWLANG_SetScalarAttributeI32
niWLANG_GetScalarAttributeI32
Description: Specifies the HE-LTF symbol size in the 802.11ax signals. The IEEE Standard 802.11ax specifies the following combinations of the HE-LTF symbol size and the NIWLANG_GUARD_INTERVAL attribute.

If you set the NIWLANG_PPDU_TYPE attribute to NIWLANG_VAL_PPDU_TYPE_SU_PPDU, NIWLANG_VAL_PPDU_TYPE_MU_PPDU or NIWLANG_VAL_PPDU_TYPE_EXTENDED_RANGE_SU_PPDU, the NIWLANG_HE_LTF_SIZE attribute is NIWLANG_VAL_HE_LTF_SIZE_4X, and the NIWLANG_GUARD_INTERVAL attribute value is 1/4.
If you set the NIWLANG_PPDU_TYPE attribute to NIWLANG_VAL_PPDU_TYPE_SU_PPDU, NIWLANG_VAL_PPDU_TYPE_MU_PPDU or NIWLANG_VAL_PPDU_TYPE_EXTENDED_RANGE_SU_PPDU, the NIWLANG_HE_LTF_SIZE attribute value is NIWLANG_VAL_HE_LTF_SIZE_2X, and the NIWLANG_GUARD_INTERVAL attribute value is 1/8.
If you set the NIWLANG_PPDU_TYPE attribute to NIWLANG_VAL_PPDU_TYPE_SU_PPDU, NIWLANG_VAL_PPDU_TYPE_MU_PPDU or NIWLANG_VAL_PPDU_TYPE_EXTENDED_RANGE_SU_PPDU, the NIWLANG_HE_LTF_SIZE attribute value is NIWLANG_VAL_HE_LTF_SIZE_2X or NIWLANG_VAL_HE_LTF_SIZE_4X, and the NIWLANG_GUARD_INTERVAL attribute value is 1/16.
If you set the NIWLANG_PPDU_TYPE attribute to NIWLANG_VAL_PPDU_TYPE_TRIGGER_BASED_PPDU, the NIWLANG_HE_LTF_SIZE attribute value is NIWLANG_VAL_HE_LTF_SIZE_4X and the NIWLANG_GUARD_INTERVAL attribute value is 1/4.
If you set the NIWLANG_PPDU_TYPE attribute to NIWLANG_VAL_PPDU_TYPE_TRIGGER_BASED_PPDU, the NIWLANG_HE_LTF_SIZE attribute value is NIWLANG_VAL_HE_LTF_SIZE_2X and the NIWLANG_GUARD_INTERVAL attribute value is 1/8.

The default value is NIWLANG_VAL_HE_LTF_SIZE_AUTO.

Set Function: niWLANG_SetOFDMHELTFSize
Get Function: niWLANG_GetOFDMHELTFSize
Values:
NIWLANG_VAL_HE_LTF_SIZE_AUTO (-1)Specifies 4x as HE-LTF symbol duration for the guard interval type value of 1/4; or 2x otherwise.
NIWLANG_VAL_HE_LTF_SIZE_4X (0)Specifies 4x as the HE-LTF symbol duration.
NIWLANG_VAL_HE_LTF_SIZE_2X (1)Specifies 2x as the HE-LTF symbol duration.

 

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