OFDM modulator, demodulator and dimension information5G NR uplink transmission uses orthogonal frequency division multiplexing (OFDM) modulation. Additionally, you can use transform precoding together with OFDM modulation to create a single-carrier frequency division multiple-access (SC-FDMA) or DFT-s-OFD...
The dot11DSSSOFDMOptionEnabled MIB object specifies whether the current PHY type has enabled the use of the hybrid DSSS-OFDM modulation. When the 802.11 station enables this option, the PHY combines the direct-sequence spread spectrum (DSSS) preamble and header with the orthogonal frequency division...
进入openair1\PHY\MODULATION\ofdm_mod.c,找到OFDM调制代码,OFDM输入信号在经过信道编码,交织,调制后成为比特流,通过IFFT及那个频域输入映射到时域后根据情况加上循环前缀(后缀,补零或者无)。 首先是函数do_OFDM_mod 根据帧来判定是MBSFN调制还是PDCCH调制,同时判定为常规CP还是扩展CP,实现一是IFFT,二是添加循环CP。
Y= ofdmmod(X,nfft,cplen,nullidx,pilotidx,pilots)inserts null and pilot subcarriers into the frequency domain input data symbols prior to performing OFDM modulation. The null subcarriers are inserted at the index locations specified bynullidx. The pilot subcarriers,pilots, are inserted at the ...
Communications Toolbox / Modulation / Digital Baseband Modulation / OFDM Description The OFDM Modulator Baseband block modulates a frequency domain signal by using the orthogonal frequency division multiplexing (OFDM) method. For more information, see Orthogonal Frequency Division Multiplexing. The output ...
OFDM —— OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术,实际上OFDM是MCM Multi-CarrierModulation,多载波调制的一种。其主要思想是:将信道分成若干正交子信道,将高速数据信号转换成并行的低速子数据流,调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开,这样可以减少子...
OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术,实际上OFDM是MCM(Multi Carrier Modulation),多载波调制的一种。 OFDM技术由MCM(Multi-Carrier Modulation,多载波调制)发展而来。OFDM技术是多载波传输方案的实现方式之一,它的调制和解调是分别基于IFFT和FFT来实现的,是实现复杂度最低、应用最广的一...
Apply OFDM modulation to the data and pilot signals. modData = ofdmMod(dataIn,pilotIn); Use the OFDM modulator object to create the corresponding OFDM demodulator. ofdmDemod = comm.OFDMDemodulator(ofdmMod); Demodulate the OFDM signal and output the data and pilot signals. ...
Orthogonal Frequency Division Multiplexing (OFDM) is a digital multi-carrier modulation scheme that ex...