802.11bn Signal Configuration

This topic applies to the following Generation Mode:

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1. General Settings

User Schedule Mode

Enable/disable user schedule mode. When enabled, the parameters L-SIG Length, LDPC Extra Symbol, PE Disambiguity, and Pre-FEC Padding Factor become editable.

L-SIG Length

Range: 0 to 4095

Sets the value of the L-SIG length field of the HE trigger-based PPDU that is the response to the trigger frame.

LDPC Extra Symbol

Indicates the presence of the extra OFDM symbol for LDPC.

Pre-FEC Padding Factor

Get the Pre-FEC Padding Factor.

PE Disambiguity

Gets or sets the PE Disambiguity subfield.

LTF Symbol Interval Mode

Select the Symbol interval (with guard interval) for the UHR-LTF field.The possible options are 1x UHR-LTF + 1.6 us, 2x UHR-LTF + 1.6 us and 4x UHR-LTF + 3.2 us.

Number of UHR-LTFs

Specify the number of UHR-LTFs. If Maximum Number of Total Spatial Streams is 1, then its value is 1, otherwise its value is the ceiling of (NumOfTotalSpatialStreams / 2.0) * 2.

Maximum Number of Total Spacial Time Streams (Nss,total)

This is information indicating the total number of spatial streams of current Resource Unit, which is equal to the sum of the Nss for each user.

Number of Transmit Chains (Ntx)

Set the number of transmit chains. When the number of instruments is more than 1, it automatically equals to the number of instruments and can't be changed, otherwise, it's editable.

Maximum Packet Extension Duration

Set or Get the Maximum Packet Extension Duration for Current PPDU.An UHR PPDU may have a Packet Extension (PE) field appended at the end of the PPDU, with possible durations being 0 us, 8 us, 16 us or 20 us. The PE field, when present, shall be transmitted with the same average power as the Data field, and its content is arbitrary.

2. U-SIG Settings

Link

Indicates whether the frame is Uplink or Downlink. The field is set to DL for TDLS and set to UL for UHR TB PPDU.

BSS Color

Get or Set the Base station identifier.The BSS Color field is an identifier of the BSS.

TXOP Duration

Set or Get the remaining time duration in the current TXOP. Set to 8449 μs to indicate no duration information. Set to value other than 8449 μs to indicate the duration information for NAV setting and protection of the TXOP. When the value ranges from 0 to 504 μs, the granularity is 8 μs. When the value ranges from 512 to 8448 μs, the granularity is 128 μs.

Spatial Reuse 1

Indicates whether or not spatial reuse is allowed in a subband of the PPDU during the transmission of this PPDU, and if allowed, indicates a value that is used to determine a limit on the transmit power of a spatial reuse transmission. If the Bandwidth field indicates 20 MHz, 40 MHz, or 80 MHz: Spatial Reuse field for the first 20 MHz subband. If the Bandwidth field indicates 160 MHz: Spatial Reuse field for first 40 MHz subband of the 160 MHz operating band. If the Bandwidth field indicates 320 MHz: each Spatial Reuse subfield is set to the smaller value of the Spatial Reuse 1 and the Spatial Reuse 2 subfield.Set to 0 (SR disallowed Entry) to disallow SRP-based spatial reuse.Set to value 1 to 14 corresponding to SRP value for SRP-based SR operation.

Spatial Reuse 2

Indicates whether or not spatial reuse is allowed in a subband of the PPDU during the transmission of this PPDU, and if allowed, indicates a value that is used to determine a limit on the transmit power of a spatial reuse transmission..If the Bandwidth field indicates 20 MHz, 40 MHz, or 80 MHz: Spatial Reuse field for the second 20 MHz subband. When operating in 20 MHz, this field is set to same value as Spatial Reuse 1 field.When operating 40 MHz in 2.4 GHz band, this field is set to same value as Spatial Reuse 1 field. If the Bandwidth field indicates 160 MHz: Spatial Reuse field for second 40 MHz subband of the 160 MHz operating band. If the Bandwidth field indicates 320 MHz: each Spatial Reuse subfield is set to the smaller value of the Spatial Reuse 1 and the Spatial Reuse 2 subfield.

3. Uplink RU Arrangement Settings

The 1st Band Allocation Index

Gets or sets the RU allocation index for the 1st 20MHz subband. It may contain multiple small-size RUs/MRUs or a large-size RU/MRU that may span multiple 20MHz subbands including the current subband. RU allocation bits 000011010 represent a punctured 242-tone RU.

Distribute RU

Enable/disable distributed RUs for 20MHz | 40MHz | 80MHz PPDU.

Non-OFDMA

Indicates whether OFDMA or non-OFDMA RU/MRU transmission of UHR TB PPDU is supported for PPDU bandwidth of 160 MHz or 320 MHz. DRU is not supported for non-OFDMA RU/MRU.

RU/MRU Index

Gets or sets the RU/MRU index for non-OFDMA UHR TB PPDU.

Number of Full BW MU-MIMO

Get or Set the number of MU-MIMO users when compression mode is enabled.

Distribute RU in the 1st 80MHz

Enable/disable distributed RU for the 1st 80MHz frequency subblock.

Distribute BW in the 4th 80MHz

Pattern of Distribute BWs in the 4th 80MHz frequency subblock.

4. Impairments in Waveform

Symbol Clock Offset

Range: -300 to 300 ppm

Default: 0 ppm

Get or set the offset to the standard symbol rate in ppm. This error will be added to standard sample clock in the waveform header.

Quadrature Waveform Adjustment for Waveform 1

Range: -90 to 90 degrees

Set the baseband quadrature angle adjustment for Waveform 1 before channel fading and mirror spectrum.

The number of parameter groups depends on Number of Transmit Chains (Ntx). Each group is identified with an incremented waveform number, such as Waveform 1, Waveform 2, and so on.

I/Q Gain Balance for Waveform 1

Range: -10 to 10 dB

Set the baseband IQ gain balance for Waveform 1 before channel fading and mirror spectrum.

The number of parameter groups depends on Number of Transmit Chains (Ntx). Each group is identified with an incremented waveform number, such as Waveform 1, Waveform 2, and so on.

Enable All RUs

Sets the State to On for all the RUs in the table.

Disable All RUs

Sets the State to Off for all the RUs in the table except the first RU, which must remain On.

Band #

Get the index of the first 20-MHz subband where the RU/MRU is located..

State

Resource unit (RU) state.

RU Size

Get the RU/MRU size.

The instrument must have at least the equivalent bandwidth to allow the waveform to be successfully transmitted.

User Number

Get the number of users for current resource unit (RU).

Nss,total

This is information indicating the total number of spatial streams of current resource unit (RU), which is equal to the sum of the Nss for each user.

802.11bn Waveform Setup