Documentation

wlanS1GConfig

创建S1G格式配置对象

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Syntax

CFGS1G = WLANS1GCONFIG
CFGS1G = WLANS1GCONFIG（（姓名,Value)

描述

example

CFGS1G = WLANS1GCONFIGcreates a configuration object that initializes parameters for an IEEE®802.11™ sub 1 GHz (S1G) formatppdu。

example

cfgS1G= wlanS1GConfig(姓名,Value)creates an S1G format configuration object that overrides the default settings using one or more姓名,Value配对参数。

在运行时，调用函数验证了与该函数操作相关的属性的对象设置。

例子

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Open Live Script

Create an S1G configuration object with default settings for a single user. Override the default by specifying a 4 MHz channel bandwidth and short preamble configuration.

CFGS1G = WLANS1GCONFIG;cfgS1G.ChannelBandwidth ='cbw4';cfgs1g.preamble ='Short';cfgS1G
CFGS1G = WLANS1GCONFIGwith properties: ChannelBandwidth: 'CBW4' Preamble: 'Short' NumUsers: 1 NumTransmitAntennas: 1 NumSpaceTimeStreams: 1 SpatialMapping: 'Direct' STBC: 0 MCS: 0 APEPLength: 256 GuardInterval: 'Long' PartialAID: 37 UplinkIndication: 0 Color: 0 TravelingPilots: 0 ResponseIndication: 'None' RecommendSmoothing: 1 Read-only properties: ChannelCoding: 'BCC' PSDULength: 261
Open Live Script

Create an S1G configuration object that assigns a 2 MHz bandwidth and two users. Use a combination of Name,Value pairs and in-line initialization to change default settings. In vector-valued properties, each element applies to a specific user.

CFGMU= wlanS1GConfig('ChannelBandwidth','CBW2',。。。'Preamble','长',。。。'NumUsers'，2，。。。'GroupID'，2，。。。'num Transmitantennas'，2）;cfgmu.numspacetimestreams = [1 1];cfgmu.mcs = [4 8];cfgmu.apeplength = [1024 2048];CFGMU
cfgmu = wlans1gconfig带有属性：channelbandwidth：'cbw2'序言：'long'数字器：2用户置：[0 1] numTransmitantannas：2 numspaceTimeStreams：[1 1 1]空间图：'Direct MCS：'Direct MCS：[4 8] Apeplength：[4 8] Apeplength：[1024 2048：[1024 2048）] GuardInterval：“长”组ID：2 TravelPilots：0响应介绍：'none'读取属性：Channel编码：'BCC'psdulength：[1031 2065]

NumUsers被设定为2 and the user-dependent properties are two-element vectors.

Open Live Script

使用单个用户的默认设置创建S1G配置对象，并使用点表示法更改默认属性设置。使用packetFormat对象函数访问对象的S1G数据包格式。

Create an S1G configuration object with default settings. By default, the configuration object creates properties to model the short S1G packet format.

CFGS1G = WLANS1GCONFIG;packetFormat（CFGS1G）
ans ='s1g-short'

Modify the defaults by using the dot notation to specify a long preamble.

cfgs1g.preamble ='长';packetFormat（CFGS1G）
ans ='s1g-long'

Input Arguments

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姓名-Value Pair Arguments

Specify optional comma-separated pairs of姓名,Value参数。姓名is the argument name andValueis the corresponding value.姓名must appear inside single quotes (' '）。您可以按任何顺序指定几个名称和值对参数NAME1，Value1，...，Namen，Valuen。

例子：“ ChannelBandWidth”，“ CBW4”，“ Numusers”，2specifies a channel bandwidth of 4 MHz and two users for the S1G format packet.

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信道带宽, specified as'CBW1','CBW2','cbw4','cbw8', or'cbw16'。如果传输有多个用户，则将相同的频道带宽应用于所有用户。

例子：'cbw16'sets the channel bandwidth to 16 MHz.

数据类型：char|细绳

前言type, specified as'Short'or'长'。此属性仅适用ChannelBandwidth不是'CBW1'。

数据类型：char|细绳

用户数, specified as 1, 2, 3, or 4. (NUsers)

数据类型：双倍的

Position of users, specified as an integer row vector with length equal toNumUsersand element values from 0 to 3 in a strictly increasing order. This property applies whenNumUsers> 1.

例子：[0 2 3]indicates positions for three users, where the first user occupies position 0, the second user occupies position 2, and the third user occupies position 3.

数据类型：双倍的

发射天线的数量，指定为标量整数从1到4。

数据类型：双倍的

变速箱中的时空流数，指定为标量或向量。（（Nsts)

  • 对于单个用户，时空流的数量是从1到4的整数标量。

  • For multiple users, the number of space-time streams is a 1-by-NUsers整数从1到4的向量, whereNUsers≤ 4. The sum total of space-time streams for all users,Nsts_Total，不得超过四个。

例子：[1 1 2]指示三个用户的时空流数量，其中第一个用户获得1个时空流，第二个用户获得1个时空流，而第三个用户将获得2个时空流。分配的时空流总数为4。

数据类型：双倍的

空间映射方案，指定为'Direct','Hadamard','Fourier', or'Custom'。的默认值'Direct'applies whenNum Transmitantennasandnumspacetimestreams相等。

数据类型：char|细绳

Spatial mapping matrix, specified as a scalar, matrix, or 3-D array. Use this property to apply a beamforming steering matrix, and to rotate and scale the constellation mapper output vector. If applicable, scale the space-time block coder output instead.SpatialMappingMatrixapplies when theSpatialMappingproperty is set to'Custom'。有关更多信息，请参见IEEE STD 802.11-2012，第20.3.11.11.2节。

  • 当指定为标量时，常数值适用于所有子载波。

  • 当指定为矩阵时，大小必须为Nsts_total-经过-NT。这spatial mapping matrix applies to all the subcarriers.Nsts_totalis the sum of space-time streams for all users, andNTis the number of transmit antennas.

  • 当指定为3-D数组时，大小必须为NST-经过-Nsts_total-经过-NT。NSTis the sum of the occupied data (NSD) and pilot (NSP) subcarriers, as determined byChannelBandwidth。Nsts_total是所有用户的时空流的总和。NTis the number of transmit antennas.

    NST随着频道带宽的增加。

    ChannelBandwidth Number of Occupied Subcarriers (NST) Number of Data Subcarriers (NSD) 飞行员子载体的数量（NSP)
    'CBW1' 26 24 2
    'CBW2' 56 52 4
    'cbw4' 114 108 6
    'cbw8' 242 234 8
    'cbw16' 484 468 16

调用功能使每个子载波的空间映射矩阵归一化。

例子：[0.5 0.3 0.4; 0.4 0.5 0.8] represents a spatial mapping matrix having two space-time streams and three transmit antennas.

数据类型：双倍的
Complex Number Support:是的

在长长的序言包中启用波束形成, specified as a logical. Beamforming is performed when this setting istrue。This property applies for a long preamble (前言='长') withNumUsers= 1和SpatialMapping='Custom'。这SpatialMappingMatrix属性指定波束形成转向矩阵。

数据类型：logical

Enable space-time block coding (STBC) of the PPDU data field, specified as a logical. STBC transmits multiple copies of the data stream across assigned antennas.

  • When set tofalse，没有STBC应用于数据字段，时空流的数量等于空间流的数量。

  • When set totrue, STBC is applied to the data field, and the number of space-time streams is double the number of spatial streams.

See IEEE 802.11ac™-2013, Section 22.3.10.9.4 for further description.

Note

STBCis relevant for single-user transmissions only.

数据类型：logical

调制和编码方案used in transmitting the current packet, specified as a scalar or vector.

  • 对于一个用户，the MCS value is a scalar integer from 0 to 10.

  • 对于多个用户，MC是1 by-NUsersvector of integers or a scalar with values from 0 to 10, whereNUsers≤ 4.

MCS 调制 Coding Rate Comment
0 bpsk 1/2
1 QPSK 1/2
2 QPSK 3/4
3 16QAM 1/2
4 16QAM 3/4
5 64Qam 2/3
6 64Qam 3/4
7 64Qam 5/6
8 256QAM 3/4
9 256QAM 5/6
10 bpsk 1/2 Applies only forChannelBandwidth='CBW1'

数据类型：双倍的

A-MPDU Pre-EOF填充中的字节数，指定为整数标量或向量。

  • 对于一个用户，apeplengthis a scalar integer from 0 to 65,535.

  • For multiple users,apeplengthis a 1-by-NUsersvector of integers or a scalar with values from 0 to 65,535, whereNUsers≤ 4.

  • apeplength= 0for a null data packet (NDP).

apeplengthis used internally to determine the number of OFDM symbols in the data field.

Note

Only aggregated data transmission is supported.

数据类型：双倍的

数据包中数据字段的循环前缀长度，指定为'长'or'Short'。

  • 这long guard interval length is 800 ns.

  • 这short guard interval length is 400 ns.

Note

For S1G, the first OFDM symbol within the data field always has a long guard interval, even whenGuardInterval被设定为'Short'。

数据类型：char|细绳

组识别号，指定为1到62的整数标量。组识别号在多用户传输过程中发出信号。因此，此属性适用于长期序言（前言='长') and whenNumUsers大于1。

数据类型：双倍的

Abbreviated indication of the PSDU recipient, specified as an integer scalar from 0 to 511.

  • 对于一个上行传播,部分identification number is the last nine bits of the basic service set identifier (BSSID) and must be an integer from 0 to 511.

  • 对于下行链路传输，客户端的部分识别是将关联ID与其服务AP的BSSID相结合的标识符，并且必须是0到63的整数。

For more information, see IEEE Std 802.11ac-2013, Table 22-1.

数据类型：双倍的

Enable uplink indication, specified as a logical. Set上行链接totruefor uplink transmission orfalsefor downlink transmission. This property applies whenChannelBandwidth不是'CBW1'andNumUsers= 1.

数据类型：logical

接入点(AP)颜色标识符指定为一个n integer from 0 to 7. An AP includes aColornumber for the basic service set (BSS). An S1G station (STA) can use theColorsetting to determine if the transmission is within a BSS it is associated with. An S1G STA can terminate the reception process for transmissions received from a BSS that it is not associated with. This property applies whenChannelBandwidth不是'CBW1',NumUsers= 1, and上行链接=false。

数据类型：双倍的

Enable traveling pilots, specified as a logical. SetTravelingPilotstotruefor nonconstant pilot locations. Traveling pilots allow a receiver to track a changing channel due to Doppler spread.

数据类型：logical

Response indication type, specified as'没有任何','NDP','Normal', or'长'。This information is used to indicate the presence and type of frame that will be sent a short interframe space (SIFS) after the current frame transmission. The response indication field is set based on the value of响应调查and transmitted in;

  • S1G_SHORT序言的SIG2字段

  • 这SIG-A-2 field of the S1G_LONG preamble

  • S1G_1M的SIG字段

数据类型：char|细绳

建议平滑以进行频道估计, specified as a logical.

  • If the frequency profile is nonvarying across the channel , the receiver sets this property totrue。在这种情况下，建议将频域平滑作为通道估计的一部分。

  • If the frequency profile varies across the channel, the receiver sets this property tofalse。In this case, frequency-domain smoothing is not recommended as part of channel estimation.

数据类型：logical

输出参数

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S1Gppdu配置，返回为wlanS1GConfig目的。属性cfgS1Gare described inwlans1gconfig属性。

More About

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ppdu

这physical layer convergence procedure (PLCP) protocol data unit (PPDU) is the complete PLCP frame, including PLCP headers, MAC headers, the MAC data field, and the MAC and PLCP trailers.

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