按照IEEE®802.11AC™-2013，第22.3.10.9.1节中定义的256QAM拆除。

创建数据位的顺序。

bit = randi（[0 1]，416,1，'int8'）；

Perform the constellation mapping on the data bits by using a 256QAM modulation. The size of the output returned equals the size of the input sequence divided by eight.

numbpscs = 8;mappeddata = wlanconStellationMap（位，numbpscs）;尺寸（mappeddata）

ans =1×252 1

Perform the 256QAM constellation demapping. Because the default demapping type is soft, the output is a vector of soft bits.

noingsvar = 0;demappedData = wlanConstellationDemap(mappedData,noiseVar,numBPSCS); size(demappedData)

ans =1×2416 1

Perform a 256QAM demapping by using hard demodulation. The demapping is defined in IEEE® 802.11™-2012 Section 18.3.5.8

创建数据位的顺序。

bits = randi([0 1],416,1);

Perform the constellation mapping on the data bits by using a 256QAM constellation.

numbpscs = 8;mappeddata = wlanconStellationMap（位，numbpscs）;

Perform the hard 256QAM constellation demapping. Because it is a hard demapping, the estimated noise variance is ignored.

noingsvar = 0;demaptype ='hard'; demappedData = wlanConstellationDemap(mappedData,noiseVar,numBPSCS,demapType);

验证删除数据与原始数据匹配。

que equal（位，demappeddata）

ans =logical1

BPSK和QBPSK通过使用软解码为VHT-SIG-A字段的不同OFDM符号删除。该拆卸是在IEEE®802.11ac™-2013第22.3.8.3.3节中定义的

创建数据位的顺序。在列中指定两个OFDM符号。

bits = randi([0 1],48,2,'int8'）；

在数据位上执行星座映射。将星座旋转的大小指定为输入序列列中的数字。第一列用BPSK调制映射。第二列通过QBPSK调制调制。

numbpscs= 1; phase = [0 pi/2]; mappedData = wlanConstellationMap(bits,numBPSCS,phase);

Perform the constellation demapping with an estimated variance noise equal to zero (no added noise). To derotate the constellation, specify the same phase as in the mapping function. The output is a vector of soft bits ready to be the input of a convolutional decoder.

noingsvar = 0;demappeddata = wlanconStellationDemap（mappeddata，noingsvar，numbPSCS，阶段）;

验证删除数据与原始数据匹配。Because no noise is present, you can recover the original data without errors by assigning the negative values to a logical 1 and the positive values to a logical 0. In other words, you can convert the soft bits into hard bits.

demappedBits = int8((demappedData<=0)); isequal(bits,demappedBits)

ans =logical1

QBPSK demapping on a four-dimensional array by using hard demodulation.

Create the sequence of data bits as an array of four dimensions, with 416 coded bits per subcarrier per spatial stream per interleaver block, four OFDM symbols, two spatial streams, and two segments.

numCBPSSI = 416; numSym = 4; numSS = 2; numSeg = 2; bits = randi([0 1],numCBPSSI,numSym,numSS,numSeg); size(bits)

ans =1×4416 4 2 2

用旋转的旋转在数据位上执行QBPSK星座映射弧度。

numbpscs= 1; phase = pi/2; mappedData = wlanConstellationMap(bits,numBPSCS,phase); size(mappedData)

ans =1×4416 4 2 2

执行硬QBPSK星座拆除。要脱落星座，请指定与映射函数中相同的阶段。因为这是一个硬拆除，所以忽略了估计的噪声方差。

noingsvar = 0;demaptype ='hard'; demappedData = wlanConstellationDemap(mappedData,noiseVar,numBPSCS,demapType);

验证删除数据与原始数据匹配。

que equal（位，demappeddata）

ans =logical1