wlanSegmentDeparseSymbols

段解析数据子载波

Syntax

y = wlanSegmentDeparseSymbols(sym,cbw)

Description

y= wlansegmentDeparsesymbols（sym,CBW.)performs segment deparsing on the inputsym按照IEEE^®802.11ac™-2013, Section 22.3.10.9.3, whenCBW.is'CBW16'或者'CBW160'.

Note

Segment deparsing of the data subcarriers 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, whenCBW.is any accepted value other than'CBW16'或者'CBW160',wlanSegmentDeparseSymbolsreturns the input unchanged.

Examples

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Segment-Deparse Symbols

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Segment-deparse the symbols in four OFDM symbols for a VHT configuration with a channel bandwidth of 16 MHz and 3 spatial streams.

Define the input parameters. Since the channel bandwidth is 16 MHz, set the number of data subcarriers to 468 and the number of frequency segments to two.

chanBW ='CBW16'; numSD = 468; numSym = 4; numSS = 3; numSeg = 2;

Create the input sequence of symbols.

data =兰德i([0 1],numSD/numSeg,numSym,numSS,numSeg);

Segment-deparse the symbols into data subcarriers. The first dimension of the parsed output accounts for the total number of data subcarriers.

deparsedData = wlanSegmentDeparseSymbols(data,chanBW); size(deparsedData)

ans =1×3468 4 3

Get Symbol Order for a VHT Configuration

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Get the symbol order after stream deparsing a sequence for a VHT configuration with a channel bandwidth of 160 MHz and one spatial stream.

Define the input parameters. Since the channel bandwidth is 160 MHz, set the number of data subcarriers to 468 and the number of frequency segments to two.

chanBW ='CBW160'; numSD = 468; numSym = 1; numSS = 1; numSeg = 2;

Create the input sequence of symbols.

sequence = (1:numSD*numSym*numSS).'; inp = reshape(sequence, numSD/numSeg, numSym, numSS, numSeg);

Segment-deparse the symbols. The output is a column vector with the sequence order of the symbols.

deparsedData = wlanSegmentDeparseSymbols(inp, chanBW); deparsedData(1:10)

ans =10×11 2 3 4 5 6 7 8 9 10

Input Arguments

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`sym`—Input sequence
4-D array

Input sequence of frequency segments to deparse, specified as an (N_SD/N_SEG)-by-N_SYMby-N_SS-by-N_SEGarray, where:

N_SDis the number of data subcarriers.
N_SEGis the number of segments. WhenCBW.is'CBW16'或者'CBW160',N_SEGis 2. Otherwise it is 1.
N_SYMis the number of OFDM symbols.
N_SSis the number of spatial streams.