NIWLANG_MAPPING_MATRIX_TYPE

NI WLAN Generation Toolkit 18.0 Help

Edition Date: October 2018

Part Number: 373725J-01

»View Product Info
Download Help (Windows Only)

Data Type: int32
Access:read/write
Functions:niWLANG_SetScalarAttributeI32
niWLANG_GetScalarAttributeI32
Description: Specifies the mapping matrix type for mapping space-time streams to transmit channels as defined in section 20.3.11.10.1 of IEEE Standard 802.11n-2009.

Note: If you set the NIWLANG_MAPPING_MATRIX_TYPE attribute to values other than NIWLANG_VAL_MAPPING_MATRIX_TYPE_DIRECT, the number of transmit channels must be greater than or equal to the sum of the number of space-time streams and the NIWLANG_NUMBER_OF_EXTENSION_SPATIAL_STREAMS attribute if the standard is set to NIWLANG_VAL_STANDARD_80211N_MIMO_OFDM.

The default value is NIWLANG_VAL_MAPPING_MATRIX_TYPE_DIRECT. If the NIWLANG_STANDARD attribute is set to NIWLANG_VAL_STANDARD_80211AX_MIMO_OFDM and the NIWLANG_PPDU_TYPE attribute is set to NIWLANG_VAL_STANDARD_TRIGGER_BASED_PPDU then N-STS value is dependent on the NIWLANG_SPATIAL_MAPPING_MODE attribute. If you set the NIWLANG_SPATIAL_MAPPING_MODE attribute to NIWLANG_VAL_COMMON, the N STS value is the maximum number of space time streams across Resource Units (RUs). If you set the NIWLANG_SPATIAL_MAPPING_MODE attribute to NIWLANG_VAL_USER_SPECIFIC, the N STS value is the number of space time streams for the specified user. You must use the following active channel string formats when NIWLANG_STANDARD attribute is set to NIWLANG_VAL_STANDARD_80211AX_MIMO_OFDM and the NIWLANG_PPDU_TYPE attribute is set to NIWLANG_VAL_STANDARD_TRIGGER_BASED_PPDU. If you set the NIWLANG_SPATIAL_MAPPING_MODE attribute to NIWLANG_VAL_COMMON, the active channel string format is an empty string. If you set the NIWLANG_SPATIAL_MAPPING_MODE attribute to NIWLANG_VAL_USER_SPECIFIC, the active channel string format is 'userx'.

Set Function: niWLANG_SetMappingMatrixType
Get Function: niWLANG_GetMappingMatrixType
Values:
NIWLANG_VAL_MAPPING_MATRIX_TYPE_DIRECT (0)Refer to the Mapping Matrix Type Values topic.
NIWLANG_VAL_MAPPING_MATRIX_TYPE_HADAMARD (1)Refer to the Mapping Matrix Type Values topic.
NIWLANG_VAL_MAPPING_MATRIX_TYPE_FOURIER (2)Refer to the Mapping Matrix Type Values topic.
NIWLANG_VAL_MAPPING_MATRIX_TYPE_USER_DEFINED (3)Refer to the Mapping Matrix Type Values topic.

WAS THIS ARTICLE HELPFUL?

Not Helpful