WLAN 802.11ac Baseband Verification Libraryedadownload.software.keysight.com/eedl/systemvue/2011_03/pdf/wl… · 1.IEEE P802.11 Wireless LANs, Proposed TGac Draft Amendment (IEEE

SystemVue - WLAN 802.11ac Baseband Verification Library

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SystemVue 2011.032011

WLAN 802.11ac Baseband Verification Library

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About WLAN 802.11ac Baseband Verification Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 WLAN 802.11ac Modulation Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 WLAN_11ac_ToneRotation Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

WLAN_11ac_ToneRotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 WLAN 802.11ac Preamble Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 WLAN_11ac_LLTF Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

WLAN_11ac_LLTF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 WLAN_11ac_LSIG Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

WLAN_11ac_LSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 WLAN_11ac_LSTF Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

WLAN_11ac_LSTF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 WLAN_11ac_VHT_LTF Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

WLAN_11ac_VHT_LTF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 WLAN_11ac_VHT_SIG_A Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

WLAN_11ac_VHT_SIG_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 WLAN_11ac_VHT_SIG_B Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

WLAN_11ac_VHT_SIG_B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 WLAN_11ac_VHT_STF Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

WLAN_11ac_VHT_STF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 WLAN 802.11ac Source Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 WLAN_11ac_Source Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

WLAN_11ac_Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25


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About WLAN 802.11ac BasebandVerification Library

The Agilent EEsof WLAN 802.11ac baseband verification library is for WLAN 11 ac market.It consists of un-coded 11ac signal source and corresponding test benches. The signalsource implements the VHT PPDU format, including L-LTF, L-SIG, L-STF, VHT_LTF,VHT_SIG_A, VHT_SIG_B, VHT_STF and VHT Data. It is based on Agilent SystemVue.The WLAN 802.11ac package includes basic components, application examples. Afterinstallation, the WLAN 802.11ac is available in the WLAN 11ac library group and palette.The WLAN 802.11ac Examples are available in\SystemVue2011.03\Examples\Baseband Verification\WLAN\WLAN_11ac.

KEY FEATURESUp to 8 tx antennas20, 40, 80, 160MHz and 80+80 (use two sources)Uncoded data for PSDU symbols1 to 8 streams (with the same number of tx antennas)MCS: 0 to 9Modulation: BPSK, QPSK, 16QAM, 64QAM, 256QAMCyclic shift (CSD) insertion800 ns long guard interval

COMPONENT LISTSWLAN_11ac_LLTFWLAN_11ac_LSIGWLAN_11ac_LSTFWLAN_11ac_VHT_LTFWLAN_11ac_VHT_SIG_AWLAN_11ac_VHT_SIG_BWLAN_11ac_VHT_STFWLAN_11ac_SrcWLAN_11ac_ToneRotation

TEST BENCHESThe WLAN 802.11ac baseband verification library provides one workspace.

WLAN_11ac_Tx_Spectrum_CCDF.wsvThis example analyzes the spectrum and Complementary CumulativeDistribution Function (CCDF) of the 802.11ac signals. Users may also save thebaseband I/Q data to files or download it to Agilent 89600B VSA softwareRev13.0 for further analysis. In 89600B Rev13.0, the Custom OFDM feature isemployed to demodulate 11ac signals, and the Custom OFDM settings for20MHz, 40MHz and 80MHz with single transmitter antenna are provided

NOTES: In this release, the following features are not supported

Channel coder for PSDU Data Symbols:PHY PaddingScramblerEncoder parserFEC encodersStream parserBCC Interleaver

STBCCustom Q matrix for spatial mappingThe information bit generation in all 11ac SIGNAL Fields400 ns short guard intervalWindowing (Note: users can add windowing or other filters after the IQ output data.)


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References

IEEE P802.11 Wireless LANs, Proposed TGac Draft Amendment (IEEE 802.11-1.10/1361r1), Nov. 2010.IEEE Std 802.11-2007, Part 11: Wireless LAN Medium Access Control (MAC) and2.Physical Layer (PHY) Specifications, June 2007IEEE Std 802.11n-2009, Amendment 5: Enhancements for Higher Throughput,3.October 2009


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WLAN 802.11ac Modulation Category Contents

WLAN 11ac ToneRotation Part (wlanacbasever)


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WLAN_11ac_ToneRotation PartCategories: Modulation (wlanacbasever)

The models associated with this part are listed below. To view detailed information on amodel (description, parameters, equations, notes, etc.), please click the appropriate link.

Model Description

WLAN_11ac_ToneRotation (wlanacbasever) Add a rotation to the tones according to the bandwidth

WLAN_11ac_ToneRotation

Description: Add a rotation to the tones according to the bandwidthDomain: UntimedC++ Code Generation Support: NOAssociated Parts: WLAN 11ac ToneRotation Part (wlanacbasever)

Model Parameters

Name Description Default Units Type RuntimeTunable

Bandwidth bandwidth of 11ac signal: BW 20MHz, BW 40MHz,BW 80MHz, BW 160MHz

BW20MHz

Enumeration NO

Input Ports

Port Name Description Signal Type Optional

1 Input Subcarrier data before tone rotation complex NO

Output Ports


2 Output Subcarrier data after tonerotation

complex NO

Notes/Equations

The model implements the tone rotation on PSDU data symbols, as defined in 22.3.71.of [1].

The function is used to represent a rotation of the tones.2.For 20 MHz PPDU transmissions3.

For 40 MHz PPDU transmissions4.

For 80 MHz PPDU transmissions5.


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For non-contiguous 160 MHz PPDU transmissions consisting of two 80 MHz frequencysegments, each 80 MHz frequency segment shall use the phase rotation for 80 MHzPPDU transmissions as defined in the Equation above for 80 MHz.For contiguous 160 MHz PPDU transmissions6.

References

IEEE P802.11 Wireless LANs, Proposed TGac Draft Amendment (IEEE 802.11-1.10/1361r1), Nov. 2010.


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WLAN 802.11ac Preamble Category Contents

WLAN 11ac LLTF Part (wlanacbasever)WLAN 11ac LSIG Part (wlanacbasever)WLAN 11ac LSTF Part (wlanacbasever)WLAN 11ac VHT LTF Part (wlanacbasever)WLAN 11ac VHT SIG A Part (wlanacbasever)WLAN 11ac VHT SIG B Part (wlanacbasever)WLAN 11ac VHT STF Part (wlanacbasever)


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WLAN_11ac_LLTF Part Legacy Long Training Field (L-LTF) generator

Categories: Preamble (wlanacbasever)


Model

WLAN_11ac_LLTF (wlanacbasever)

WLAN_11ac_LLTF

Description: Legacy Long Training Field (L-LTF) generatorAssociated Parts: WLAN 11ac LLTF Part (wlanacbasever)

Model Parameters


Bandwidth : BW 20 MHz, BW 40 MHz, BW 80 MHz,BW 160 MHz

BW 20MHz

Enumeration NO

NumTx 1 Integer NO

OversampleRatio : x1, x2, x4, x8 x1 Enumeration NO

Output Ports


1 output Terminal: Standard Data PortTerminal

multiple complex NO

Notes/Equations

The subnetwork implements Legacy Long Training field (L-LTF).1.For a bandwidth of 20 MHz and 40 MHz, the L-LTF pattern in the VHT preamble are2.defined by Equations (20-11) and (20-12) of [2], respectively, in 20.3.9.3.4. For abandwidth of 80 MHz, the L-LTF pattern is defined by Equation (22-11) of [2], whichdoes not include the phase rotations per 20 MHz subchannel.The schematic is shown below:3.


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References

IEEE P802.11 Wireless LANs, Proposed TGac Draft Amendment (IEEE 802.11-1.10/1361r1), Nov. 2010.IEEE Std 802.11n-2009, Amendment 5: Enhancements for Higher Throughput,2.October 2009


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WLAN_11ac_LSIG Part Legacy SIGNAL Field (L-SIG) generator



Model

WLAN_11ac_LSIG (wlanacbasever)

WLAN_11ac_LSIG

Description: Legacy SIGNAL Field (L-SIG) generatorAssociated Parts: WLAN 11ac LSIG Part (wlanacbasever)

Model Parameters



BW 20MHz

Enumeration NO

NumTx 1 Integer NO


TXTIME great than 24 (us) 100 Float NO

Output Ports



multiple complex NO

Notes/Equations

The subnetwork implements Legacy SIGNAL field (L-SIG).1.The L-SIG is used to communicate rate and length information. In this release, the2.information bits are set with random bits instead of L-SIG field bits defined in Figure22-9 of [1].The schematic is shown below:3.


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References



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WLAN_11ac_LSTF Part Legacy Short Training Field (L-STF) generator



Model

WLAN_11ac_LSTF (wlanacbasever)

WLAN_11ac_LSTF

Description: Legacy Short Training Field (L-STF) generatorAssociated Parts: WLAN 11ac LSTF Part (wlanacbasever)

Model Parameters



BW 20MHz

Enumeration NO

NumTx 1 Integer NO


Output Ports



multiple complex NO

Notes/Equations

The subnetwork implements Legacy Short Training field (L-STF).1.The L-STF for 20 MHz and 40 MHz are defined by Equations (20-8) and (20-9)2.respectively in 20.3.9.3.3 of [2]. For 80 MHz, the L-STF is defined by Equation (22-8)of [1], which does not include the phase rotation per 20 MHz subchannel.The schematic is shown below:3.

References


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IEEE P802.11 Wireless LANs, Proposed TGac Draft Amendment (IEEE 802.11-1.10/1361r1), Nov. 2010.IEEE Std 802.11n-2009, Amendment 5: Enhancements for Higher Throughput,2.October 2009


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WLAN_11ac_VHT_LTF Part VHT Long Training Field (VHT_LTF) generator



Model

WLAN_11ac_VHT_LTF (wlanacbasever)

WLAN_11ac_VHT_LTF

Description: VHT Long Training Field (VHT_LTF) generatorAssociated Parts: WLAN 11ac VHT LTF Part (wlanacbasever)

Model Parameters



BW 20MHz

Enumeration NO

NumTx 1 Integer NO


Output Ports



multiple complex NO

Notes/Equations

References


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WLAN_11ac_VHT_SIG_A Part VHT SIG A Field (VHT_SIG_A) generator



Model

WLAN_11ac_VHT_SIG_A (wlanacbasever)

WLAN_11ac_VHT_SIG_A

Description: VHT SIG A Field (VHT_SIG_A) generatorAssociated Parts: WLAN 11ac VHT SIG A Part (wlanacbasever)

Model Parameters



BW 20MHz

Enumeration NO

NumTx 1 Integer NO


Output Ports



multiple complex NO

hh5. Notes/Equations

The subnetwork implements the VHT-SIG-A field which carries information required1.to interpret VHT format packets.The VHT-SIG-A is composed of two symbols, VHT-SIG-A1 and VHT-SIG-A2, each2.containing 24 bits. In this release, the 24 bits are set with random bits instead ofVHT-SIG-A field bits defined in Table 22 9 of [1].

The schematic is shown below:1.


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References



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WLAN_11ac_VHT_SIG_B Part VHT SIG B Field (VHT_SIG_B) generator



Model

WLAN_11ac_VHT_SIG_B (wlanacbasever)

WLAN_11ac_VHT_SIG_B

Description: VHT SIG B Field (VHT_SIG_B) generatorAssociated Parts: WLAN 11ac VHT SIG B Part (wlanacbasever)

Model Parameters



BW 20MHz

Enumeration NO

NumTx 1 Integer NO


Output Ports



multiple complex NO

Notes/Equations

The subnetwork implements the VHT-SIG-B field symbol.1.The VHT-SIG-B is one symbol and contains 26 bits in a 20 MHz PPDU, 27 bits in a 402.MHz PPDU and 29 bits in 80 MHz, 160 MHz and 80+80 MHz PPDUs. The VHT-SIG-Bfields are listed in Table 22 11. All the fields in the VHT-SIG-B are transmitted LSBfirst. In this release, the information bits are set with random bits instead of VHT-SIG-B field bits defined in Table 22 11 of [1].

The schematic is shown below:1.


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References



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WLAN_11ac_VHT_STF Part VHT Short Training Field (VHT_STF) generator



Model

WLAN_11ac_VHT_STF (wlanacbasever)

WLAN_11ac_VHT_STF

Description: VHT Short Training Field (VHT_STF) generatorAssociated Parts: WLAN 11ac VHT STF Part (wlanacbasever)

Model Parameters



BW 20MHz

Enumeration NO

NumTx 1 Integer NO


Output Ports



multiple complex NO

Notes/Equations

The subnetwork implements the VHT Short Training Field (VHT-STF) symbol.1.The purpose of the VHT-STF is to improve automatic gain control estimation in a2.MIMO transmission. The duration of the VHT-STF is 4 μs. The frequency domainsequence used to construct the VHT-STF in 20 MHz transmission is identical to the L-STF. In 40 and 80 MHz transmissions, the VHT-STF is constructed from the 20 MHzversion by replicating it in each 20 MHz band, frequency shifting, and applyingappropriate phase rotations for each 20MHz sub-band.VHT-STF shall use the 800 ns GI regardless of the Short GI Field setting in VHT-SIG-3.A.The schematic is shown below:4.


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References



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WLAN 802.11ac Source Category Contents

WLAN 11ac Source Part (wlanacbasever)


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WLAN_11ac_Source Part WLAN 11ac source

Categories: Source (wlanacbasever)


Model

WLAN_11ac_Source (wlanacbasever)

WLAN_11ac_Source

Description: WLAN 11ac sourceAssociated Parts: WLAN 11ac Source Part (wlanacbasever)

Model Parameters


NumTx The number of transmit antennas 1 Float NO

Bandwidth Bandwidth: BW 20 MHz, BW 40 MHz, BW 80MHz, BW 160 MHz

BW 20MHz

Enumeration NO

OversampleRatio Oversample ratio, could be 1x, 2x, 4x and8x: x1, x2, x4, x8

x2 Enumeration NO

MCS Modulation coding scheme for each datastream, in range [0:9]

[3] Integerarray

NO

NumDataSyms Number of OFDM data symbols 100 Integer NO

IdleInterval Idle interval between two frame packet 0 s Float NO

Output Ports



multiple complex NO

Parameter Details

NumTx: specify the number of transmitter antennas. In current implementation, it isassumed that the number of spatial stream is equal to NumTx.Bandwidth: specify the bandwidth of 11ac signal, selected from 20MHz, 40MHz,80MHz or 160MHz. For the case of 80+80MHz signal, users can use two 80MHz 11acsources and combine them together to form the 80+80MHz signalOversampleRatio: Specify the oversample ratio of 11ac signal, selected from 1x,2x, 4x or 8x.MCS: specify the modulation coding scheme. In current implementation, onlymodulation is useful based on MCS since the channel encoder is not support. Themapping from MCS to modulation is shown below.


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MCS modulation

0 BPSK

1 QPSK

2 QPSK

3 16-QAM

4 16-QAM

5 64-QAM

6 64-QAM

7 64-QAM

8 256-QAM

9 256-QAM

Note that this MCS parameter is an array parameter, whose array size is equal toNumTx. The ith element in this parameter is used to specify the corresponding MCSin ith spatial stream.}NumDataSyms: Specify the number of PSDU data symbols. In currentimplementation, the channel encoder of PSDU data symbols is not supported, andonly the random bits are filled within PSDU data symbolsIdleInterval: specify the idle time (in units of seconds) at the beginning of each11ac frame burst.

Notes/Equations

In this source, the Very High Throughput (VHT) PPDU format PHY (see the figure1.below) is implemented, including L-STF, L-LTF, L-SIG, VHT-SIG-A, VHT-STF, VHT-LTFs, VHT-SIG-B and PSDU Data symbols.

For the features supported in this 11ac source, refer to About WLAN 802.11ac2.Baseband Verification Library (wlanacbasever).The schematic is shown below:3.


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References

IEEE P802.11 Wireless LANs, Proposed TGac Draft Amendment (IEEE 802.11-1.10/1361r1), Nov. 2010.IEEE Std 802.11-2007, Part 11: Wireless LAN Medium Access Control (MAC) and2.Physical Layer (PHY) Specifications, June 2007IEEE Std 802.11n-2009, Amendment 5: Enhancements for Higher Throughput,3.October 2009

Documents

WLAN 802.11ac Baseband Verification Libraryedadownload.software.keysight.com/eedl/systemvue/2011_03/pdf/wl… · 1.IEEE P802.11 Wireless LANs, Proposed TGac Draft Amendment (IEEE