wlanHtConfig

配置HT传输

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Description

这wlanHtConfigobject is a configuration object for the WLAN high throughput (HT) packet format.

Creation

句法

cfght = wlanhtconfig

cfght = wlanhtconfig（name，value）

Description

例子

cfght= wlanhtconfig创建一个配置对象，该对象初始化IEEE参数^®802。11™ HTPPDU。

例子

cfght= wlanhtconfig（（名称，价值）使用一个或多个名称值对设置属性。将每个属性名称包装在引号中。例如，wlanhtconfig（'GuardInterval'，'Short'）specifies a 400 nanosecond guard interval (cyclic prefix) duration.

At runtime, the calling function validates object settings for properties relevant to the operation of the function.

Properties

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`ChannelBandwidth`-Channel bandwidth of PPDU transmission
`'cbw20'`（（default) |`'cbw40'`

Channel bandwidth of PPDU transmission, specified as one of these values:

'cbw20'- 20 MHz的频道带宽
'cbw40'– Channel bandwidth of 40 MHz

Data Types:char|string

`numTransmitAntennas`-number of transmit antennas
`1`（（default) |positive integer

发射天线的数量，指定为正整数。

Data Types:double

`PreHTCyclicShifts`-Cyclic shift values of additional transmit antennas
`-75`（（default) |间隔中的整数[–200，0]|行矢量

Cyclic shift values, in nanoseconds, of additional transmit antennas for the pre-HT fields of the waveform. The first four antennas use the cyclic shift values specified in Table 19-9 of[1]。这remaininglantennas use the values you specify in this property, wherel=numTransmitAntennas– 4。Specify this property as one of these values:

An integer in the interval [–200, 0] – thewlanHtConfigobject uses this cyclic shift value for each of theladditional antennas.
A row vector of lengthlof integers in the interval [–200, 0] – thewlanHtConfigobject uses thekth element as the cyclic shift value for the（（k+4）th transmit antenna.

笔记

如果将此属性指定为长度大于的行矢量l，这wlanHtConfigobject uses only the firstlelements. For example, if you set thenumTransmitAntennas财产为16，这wlanHtConfigobject uses only the firstl=16– 4 = 12该向量的要素。

Dependencies

to enable this property, set thenumTransmitAntennas财产的价值大于4。

Data Types:double

`numSpaceTimeStreams`-number of space-time streams
`1`（（default) |`2`|`3`|`4`

number of space-time streams in the transmission, specified as1，，，，2，，，，3，，，，或者4。

Data Types:double

`numExtensionStreams`-number of extension spatial streams
`0`（（default) |`1`|`2`|`3`

number of extension spatial streams in the transmission, specified as0，，，，1，，，，2，，，，或者3。

Data Types:double

`空间图`-Spatial mapping scheme
`'直接的'`（（default) |`'Hadamard'`|`“傅立叶”`|`'风俗'`

Spatial mapping scheme, specified as'直接的'，，，，'Hadamard'，，，，“傅立叶”，，，，或者'风俗'。

Dependencies

默认值，'直接的'，仅在设置numTransmitAntennas和numSpaceTimeStreamsproperties to the same value. This property must be set to'风俗'when thenumExtensionStreamsproperty is greater than zero.

`空间映射matrix`-空间映射矩阵
`1`（（default) |complex-valued scalar|复杂值矩阵|complex-valued 3-D array

空间映射矩阵，指定为以下值之一：

一个复杂值的标量。此值适用于所有子载波。
大小的复杂值矩阵（n_STS+n_ESS）-by-n_t，，，，where:
- n_STS是时空流的数量；
- n_ESSis the number of extension spatial streams;
- n_t是发射天线的数量。
In this case, the spatial mapping matrix applies to all the subcarriers.

A complex-valued 3-D array of sizen_ST-by-(n_STS+n_ESS）-经过-n_t，，，，wheren_ST是被占领的副载波的数量。值啊fn_ST是被占用数据和试点子载体的总和。这ChannelBandwidth属性确定的值n_ST。In this case, each occupied subcarrier has its own spatial mapping matrix.

this table shows theChannelBandwidthsetting and the correspondingn_ST：

`ChannelBandwidth`	number of Occupied Subcarriers,n_ST	数字副载波的数据	number of Pilot Subcarriers
`'cbw20'`	56	52	4
`'cbw40'`	114	108	6

使用此属性旋转和扩展星座映射器的输出向量。空间映射矩阵用于在发射天线上进行波束形成和混合时空流。有关更多信息，请参见第19.3.11.11.2节[1]。调用功能使每个子载波的空间映射矩阵归一化。

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

Dependencies

this property applies only when you set the空间图财产为'风俗'。

Data Types:double
复杂的数字支持：金宝appYes

`MCS`-MCSused for transmission
`0`（（default) |间隔[0，31]中的整数

Modulation and coding scheme (MCS) used for transmission, specified as an integer in the interval [0, 31]. Each value of this property corresponds to a modulation type and coding rate in accordance with this table.

`MCS`	Modulation	编码率
`0`，，，，`8`，，，，`16`，，，，或者`24`	二进制移相键合（BPSK）	1/2
`1`，，，，`9`，，，，`17`，，，，或者`25`	Quadrature phase-shift keying (QPSK)	1/2
`2`，，，，`10`，，，，`18`，，，，或者`26`	qpsk	3/4
`3`，，，，`11`，，，，`19`，，，，或者`27`	16点正交振幅调制（16-QAM）	3/4
`4`，，，，`12`，，，，`20`，，，，或者`28`	16-QAM	3/4
`5`，，，，`13`，，，，`21`，，，，或者`29`	64-QAM	2/3
`6`，，，，`14`，，，，`22`，，，，或者`30`	64-QAM	3/4
`7`，，，，`15`，，，，`23`，，，，或者`31`	64-QAM	5/6

Values of this property in the interval [0, 7] specify one spatial stream. Values in the interval [8, 15] specify two spatial streams. Values in the interval [16, 23] specify three spatial streams. Values in the interval [24, 31] specify four spatial streams.

For more information on MCS-dependent transmission parameters, see Section 19.5 of[1]。If the number of space-time streams is equal to the number of spatial streams, no space-time block coding (STBC) is applied to the HT-Data field. For a description of STBC, see Section 19.3.11.9.2 of[1]。

Example:一个值22指定具有三个空间流，64-QAM和¾的编码速率的MC。

Data Types:double

`GuardInterval`-Guard interval (cyclic prefix) duration
`'Long'`（（default) |`'短的'`

数据包中数据字段的后卫间隔（循环前缀）持续时间，指定为以下值之一：

'Long'- 警卫间隔持续时间为800 ns
'短的'– Guard interval duration of 400 ns

Data Types:char|string

`ChannelCoding`-FEC coding type
`'BCC'`（（default) |`'LDPC'`

Forward-error-correction (FEC) coding type for the HT-Data field, specified as'BCC'用于二进制卷积编码（BCC）或'LDPC'for low-density parity-check (LDPC) coding.

Data Types:char|string

`psdulength`-PSDU长度
`1024`（（default) |间隔[0，2¹⁶– 1]

物理层收敛过程（PLCP）服务数据单元（PSDU）长度，字节，在间隔[0，2中指定为整数¹⁶- 1]。要指示一个没有可恢复的数据位的发声数据包，请将此属性设置为0。

Data Types:double

`聚合`-MPDU聚合指标
`错误的`或者`0`（（default) |`真的`或者`1`

MAC protocol data unit (MPDU) aggregation indicator, specified as a numeric or logical1（（真的）或者0（（错误的）。to specify that the generated packet uses MPDU aggregation, set this property to1（（真的）。

Dependencies

设置该属性时，此属性不适用MCS财产为0

Data Types:逻辑

`RecommendSmoothing`-Recommend smoothing for channel estimation
`真的`或者`1`（（default) |`错误的`或者`0`

建议平滑以进行通道估计，指定为数字或逻辑1（（真的）或者0（（错误的）。

If the frequency profile does not vary across the channel, the receiver sets this property to1（（真的）。In this case, frequency-domain smoothing is recommended as part of channel estimation.
If the frequency profile varies across the channel, the receiver sets this property to0（（错误的）。在这种情况下，不建议将频域平滑作为通道估计的一部分。

Data Types:逻辑

Examples

全部收缩

Create HT Configuration Object with Default Settings

打开实时脚本

创建一个HT配置对象。创建对象后，更新了传输天线和时空流的数量。

cfght = wlanhtconfig

cfght = wlanhtconfig具有属性：channelbandwidth：'cbw20'num Transmitantennas：1 numspacetimestreams：1个空间映射：'Direct'MCS：0 GuardInterval：'long'long'Channel coding：'bcc'psdulength：bcc'psdulength：1024聚集：1024聚集：0推荐：0推荐：1 1.1 1 1

将天线的数量更新为两个，并将时空流的数量更新为四个。

cfght.numtransmitantennas = 2;cfght.numspacetimestreams = 4

cfght = wlanhtconfigwith properties: ChannelBandwidth: 'CBW20' NumTransmitAntennas: 2 NumSpaceTimeStreams: 4 SpatialMapping: 'Direct' MCS: 0 GuardInterval: 'Long' ChannelCoding: 'BCC' PSDULength: 1024 AggregatedMPDU: 0 RecommendSmoothing: 1

创建wlanhtconfig对象

打开实时脚本

Create awlanHtConfig对象的PSDU长度为2048字节，并使用BCC转发误差校正。

cfght = wlanhtconfig（（“ psdulength”，，，，2048）; cfgHT.ChannelBandwidth ='cbw20'

cfght = wlanhtconfigwith properties: ChannelBandwidth: 'CBW20' NumTransmitAntennas: 1 NumSpaceTimeStreams: 1 SpatialMapping: 'Direct' MCS: 0 GuardInterval: 'Long' ChannelCoding: 'BCC' PSDULength: 2048 AggregatedMPDU: 0 RecommendSmoothing: 1

References

[1] IEEE STD 802.11-2020（IEEE STD 802.11-2016的修订版）。“第11部分：无线LAN中型访问控制（MAC）和物理层（PHY）规格。”IEEE信息技术标准 - 系统之间的电信和信息交换。本地和都会区网络 - 特定要求。

Extended Capabilities

C/C++ Code Generation
使用MATLAB®CODER™生成C和C ++代码。

版本历史记录

在R2015B中引入

也可以看看

wlanHtConfig

Description

Creation

句法

Description

Properties

ChannelBandwidth-Channel bandwidth of PPDU transmission'cbw20'（（default) |'cbw40'

numTransmitAntennas-number of transmit antennas1（（default) |positive integer

PreHTCyclicShifts-Cyclic shift values of additional transmit antennas-75（（default) |间隔中的整数[–200，0]|行矢量

Dependencies

numSpaceTimeStreams-number of space-time streams1（（default) |2|3|4

numExtensionStreams-number of extension spatial streams0（（default) |1|2|3

空间图-Spatial mapping scheme'直接的'（（default) |'Hadamard'|“傅立叶”|'风俗'

Dependencies

空间映射matrix-空间映射矩阵1（（default) |complex-valued scalar|复杂值矩阵|complex-valued 3-D array

Dependencies

MCS-MCSused for transmission0（（default) |间隔[0，31]中的整数

GuardInterval-Guard interval (cyclic prefix) duration'Long'（（default) |'短的'

ChannelCoding-FEC coding type'BCC'（（default) |'LDPC'

psdulength-PSDU长度1024（（default) |间隔[0，216– 1]

聚合-MPDU聚合指标错误的或者0（（default) |真的或者1

Dependencies

RecommendSmoothing-Recommend smoothing for channel estimation真的或者1（（default) |错误的或者0

Examples

Create HT Configuration Object with Default Settings

创建wlanhtconfig对象

更多关于

PPDU

References

Extended Capabilities

C/C++ Code Generation使用MATLAB®CODER™生成C和C ++代码。

版本历史记录

也可以看看

对象

功能

Apps

话题

`ChannelBandwidth`-Channel bandwidth of PPDU transmission
`'cbw20'`（（default) |`'cbw40'`

`numTransmitAntennas`-number of transmit antennas
`1`（（default) |positive integer

`PreHTCyclicShifts`-Cyclic shift values of additional transmit antennas
`-75`（（default) |间隔中的整数[–200，0]|行矢量

`numSpaceTimeStreams`-number of space-time streams
`1`（（default) |`2`|`3`|`4`

`numExtensionStreams`-number of extension spatial streams
`0`（（default) |`1`|`2`|`3`

`空间图`-Spatial mapping scheme
`'直接的'`（（default) |`'Hadamard'`|`“傅立叶”`|`'风俗'`

`空间映射matrix`-空间映射矩阵
`1`（（default) |complex-valued scalar|复杂值矩阵|complex-valued 3-D array

`MCS`-MCSused for transmission
`0`（（default) |间隔[0，31]中的整数

`GuardInterval`-Guard interval (cyclic prefix) duration
`'Long'`（（default) |`'短的'`

`ChannelCoding`-FEC coding type
`'BCC'`（（default) |`'LDPC'`

`psdulength`-PSDU长度
`1024`（（default) |间隔[0，2¹⁶– 1]

`聚合`-MPDU聚合指标
`错误的`或者`0`（（default) |`真的`或者`1`

`RecommendSmoothing`-Recommend smoothing for channel estimation
`真的`或者`1`（（default) |`错误的`或者`0`

C/C++ Code Generation
使用MATLAB®CODER™生成C和C ++代码。