wlanNonHTConfig

Create non-HT configuration object

expand all in page

Description

The wlanNonHTConfig object is a configuration object for the WLAN non-high-throughput (non-HT) packet format.

Creation

Syntax

cfgNonHT = wlanNonHTConfig
cfgNonHT = wlanNonHTConfig(Name,Value)

Description

example

cfgNonHT = wlanNonHTConfig creates a configuration object that initializes parameters for an IEEE® 802.11™ non-HT PPDU.

example

cfgNonHT = wlanNonHTConfig(Name,Value) sets properties using one or more name-value pairs. Enclose each property name in quotation marks. For example, wlanNonHTConfig('Modulation','DSSS') specifies the modulation type as direct-sequence spread spectrum (DSSS).

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

Properties

expand all

Modulation type for the non-HT transmission, specified as 'OFDM' for orthogonal frequency division multiplexing (OFDM) or 'DSSS' for direct-sequence spread spectrum (DSSS).

Data Types: char | string

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

  • 'CBW5' – Channel bandwidth of 5 MHz

  • 'CBW10' – Channel bandwidth of 10 MHz

  • 'CBW20' – Channel bandwidth of 20 MHz

Data Types: char | string

OFDM MCS used for transmission, specified as an integer in the interval [0, 7]. This table shows the modulation type and coding rate for each valid value of MCS:

MCSModulationCoding RateCoded Bits Per Subcarrier Coded Bits Per OFDM SymbolData Bits Per OFDM SymbolData Rate in Mbps
5-MHz Channel Bandwidth10-MHz Channel Bandwidth20-MHz Channel Bandwidth
0Binary phase-shift keying (BPSK)1/2148241.536
1BPSK3/4148362.254.59
2quadrature phase-shift keying (QPSK)1/2296483612
3QPSK3/4296724.5918
416-point quadrature amplitude modulation (16-QAM)1/241929661224
516-QAM3/4419214491836
664-QAM2/36288192122448
764-QAM3/4628821613.52754

For more information, see Table 17-4 of [1].

Data Types: double

Data rate for DSSS modulation, specified as a one of these values:

  • '1Mbps' – Differential binary phase-shift keying (DBPSK) with a data rate of 1 Mbps

  • '2Mbps' – Differential quadrature phase-shift keying (DQPSK) with a data rate of 2 Mbps

  • '5.5Mbps' – Complementary code keying (CCK) with a data rate of 5.5 Mbps

  • '11Mbps' – CCK with a data rate of 11 Mbps

Data Types: char | string

DSSS modulation preamble type, specified as 'Long' or 'Short'.

Dependencies

The 'Short' value of this property does not apply when you set the DataRate property to '1Mbps'.

Data Types: char | string

Clock locking indicator for DSSS modulation, specified as a numeric or logical 1 (true) or 0 (false). This property corresponds to the locked clocks bit (bit b2) of the SERVICE field as specified in Section 16.2.3.5 of [1]. To indicate that the physical layer (PHY) implementation derives its transmit frequency clock and symbol clock from the same oscillator, set this property to 1 (true). For more information, see Sections 16.2.3.5 and 18.1.3 of [1].

Note

Section 18.3.2.2 of [1] specifies that the locked clocks bit must be 1 for all extended rate PHY (ERP) systems when transmitting at any of these rates:

  • An optional ERP-packet binary convolutional coding (ERP-PBCC) rate

  • A data rate described in Section 16 of [1]

Therefore, to model ERP systems, you must set this property to 1 (true).

Data Types: logical

Physical layer convergence procedure (PLCP) service data unit (PSDU) length, in bytes, specified as an integer in the interval [0, 4095].

Data Types: double

Number of transmit antennas, specified as a positive integer.

Dependencies

To enable this property, set the ChannelBandwidth property to 'CBW20'.

Data Types: double

Cyclic shift values, in nanoseconds, of additional transmit antennas. The first eight antennas use the cyclic shift values specified in Table 21-10 of [1]. The remaining L antennas use the values you specify in this property, where L = NumTransmitAntennas – 8. Specify this property as one of these values:

  • An integer in the interval [–200, 0] – the wlanNonHTConfig object uses this cyclic shift value for each of the L additional antennas.

  • A row vector of length L of integers in the interval [–200, 0] – the wlanNonHTConfig object uses the kth element as the cyclic shift value for the (k + 8)th transmit antenna.

    Note

    If you specify this property as a row vector of length greater than L, the wlanNonHTConfig object uses only the first L elements. For example, if you set the NumTransmitAntennas property to 16, the wlanNonHTConfig object uses only the first L= 16 – 8 = 8 elements of this vector.

Dependencies

To enable this property, set the NumTransmitAntennas property to a value greater than 8.

Data Types: double

Examples

collapse all

Open Live Script

Create a wlanNonHTConfig object for OFDM operation for a PSDU length of 2048 bytes.

cfgNHT = wlanNonHTConfig('Modulation','OFDM');
cfgNHT.PSDULength = 2048;
cfgNHT
cfgNHT = 
  wlanNonHTConfig with properties:

             Modulation: 'OFDM'
       ChannelBandwidth: 'CBW20'
                    MCS: 0
             PSDULength: 2048
    NumTransmitAntennas: 1
Open Live Script

Create a wlanNonHTConfig object for DSSS operation for a PSDU length of 2048 bytes.

cfgNHT = wlanNonHTConfig('Modulation','DSSS','PSDULength',2048)
cfgNHT = 
  wlanNonHTConfig with properties:

      Modulation: 'DSSS'
        DataRate: '1Mbps'
    LockedClocks: 1
      PSDULength: 2048

More About

expand all

References

[1] IEEE Std 802.11-2016 (Revision of IEEE Std 802.11-2012). “Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications.” IEEE Standard for Information technology — Telecommunications and information exchange between systems. Local and metropolitan area networks — Specific requirements.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

See Also

Objects

Functions

Apps

Topics

Introduced in R2015b

[1] IEEE Std 802.11-2016 Adapted and reprinted with permission from IEEE. Copyright IEEE 2016. All rights reserved.

WLAN Toolbox Documentation
Support