Documentation

wlanSegmentDeparseBits

Segment-deparse data bits

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Syntax

y = wlanSegmentDeparseBits(bits,cbw,numES,numCBPS,numBPSCS)

Description

example

y= wlanSegmentDeparseBits(bits,cbw,numES,numCBPS,numBPSCS)performs the inverse operation of the segment parsing defined in IEEE®802.11ac™-2013 Section 22.3.10.7 whencbwis'CBW16'or'CBW160'.

Note

Segment deparsing of the bits applies only when the channel bandwidth is either 16 MHz or 160 MHz, and is bypassed for the remaining channel bandwidths (as stated in the aforementioned section of IEEE802.11ac-2013). Therefore, whencbwis any accepted value other than'CBW16'or'CBW160',wlanSegmentParseBitsreturns the input unchanged.

Examples

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Open Live Script

Segment-deparse the coded bits for a VHT configuration (with a channel bandwidth of 160 MHz and three spatial streams) into two OFDM symbols.

Define the input parameters. Set the channel bandwidth to 160 MHz, the number of coded bits per OFDM symbol to 2808, the number of spatial streams to 3, the number of encoded streams to 1, the number of coded bits per subcarrier per spatial stream to 2, and the number of OFDM symbols to 2. Calculate the number of coded bits per OFDM symbol per spatial stream by dividing the number of coded bits per OFDM symbol by the number of spatial streams.

chanBW ='CBW160'; numCBPS = 2808; numSS = 3; numES = 1; numBPSCS = 2; numSym = 2; numCBPSS = numCBPS/numSS;

Create the input sequence of bits.

位=兰迪([0,1],numCBPSS * numSym numSS);

Perform segment parsing on the bits.

parsedBits = wlanSegmentParseBits(bits,chanBW,numES,numCBPS,numBPSCS); size(parsedBits)
ans =1×3936 3 2

Perform segment deparsing on the parsed bits.

deparsedBits = wlanSegmentDeparseBits(parsedBits,chanBW,numES,numCBPS,numBPSCS); size(deparsedBits)
ans =1×21872 3

Verify that the deparsed data matches the original data.

isequal(bits,deparsedBits)
ans =logical1

Input Arguments

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Input sequence of deinterleaved bits, specified as an (NCBPSSI×NSYM)-by-NSS-by-NSEGarray, where:

  • NCBPSSIis the number of coded bits per OFDM symbol per spatial stream per interleaver block.

  • NSYMis the number of OFDM symbols.

  • NSSis the number of spatial streams.

  • NSEGis the number of segments. Whencbwis'CBW16'or'CBW160',NSEGmust be 2. Otherwise it must be 1.

Data Types:double|int8

Channel bandwidth in MHz, specified as'CBW1','CBW2','CBW4','CBW8','CBW16','CBW20','CBW40','CBW80', or'CBW160'.

Example:'CBW160'

Data Types:char|string

Number of encoded streams, specified as an integer from 1 to 9, or 12.

Data Types:double

Number of coded bits per OFDM symbol, specified as a positive integer. Whencbwis'CBW16'or'CBW160',numCBPSmust be an integer equal to 468×NBPSCS×NSS, where:

  • NBPSCSis the number of coded bits per subcarrier per spatial stream.

  • NSSis the number of spatial streams. It accounts for the number of columns (second dimension) of the inputbits.

Data Types:double

Number of coded bits per subcarrier per spatial stream, specified aslog2(M), whereMis the modulation order. Therefore,numBPSCSmust equal:

  • 1 for a BPSK modulation

  • 2 for a QPSK modulation

  • 4一16 qam调制

  • 6 for a 64QAM modulation

  • 8 for a 256QAM modulation

Data Types:double

Output Arguments

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Merged segments of data, specified as an (NCBPSS×NSYM)-by-NSSmatrix, where:

  • NCBPSSis the number of coded bits per OFDM symbol per spatial stream.

  • NSYMis the number of OFDM symbols.

  • NSSis the number of spatial streams.

Extended Capabilities

See Also

Introduced in R2017b

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WLAN System Toolbox Documentation
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