Copy Code Copy Command Apply OFDM modulation assigning null subcarriers. Initialize input parameters and generate random data. Get M = 16; % Modulation order for 16QAM nfft = 64; % FFT length cplen = 16; % Cyclic prefix length nSym = 10; % Number of symbols per RE nullIdx = [1:6...
MATLAB Orthogonal Frequency Division Multiplexing (OFDM) is the multicarrier digital modulation technique used by modern wireless communications systems such as 5G and LTE cellular, and WiFi. The advantages of OFDM over other techniques, such as single carrier QAM, include support of higher data ...
Off-Canvas Navigation Menu ToggleContents Apply OFDM modulation to the data and pilot QAM signals. Filter the signal through an AWGN channel. To recover the data and pilot symbols, apply OFDM demodulation and then QAM-demodulation. modOut = ofdmMod(dataIn,pilotIn); chanOut = awgn(modOut,20...
Modulation ofdm.PSpace = 1; % pilot space between two pilots % channel parameters chan.SNR_dB = 15; % signal to noise ratio chan.L = 6; % number of channel taps between each transmit-receive antenna % control parameters ofdm.ifDemodulateData = 1; % (1,0) if 1, the code de...
% 速率恢复 rateRecover = nrRateRecoverLDPC(chOut,num_bit,CodeRate,rv,modulation,nlayers); % LDPC译码 % maxNumIter:解码迭代的最大次数,指定为正整数标量。 当所有奇偶校验都满足时,或在 maxNumIter 迭代次数之后终止解码。 maxNumIter = 25; decBits = nrLDPCDecode(rateRecover,bgn,maxNumIter); %...
OFDM原理及matlab代码仿真 我也不明白OFDM是个咋回事 OFDM 一,OFDM的原理 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。通过频分复用实现高速串行数据的并行传输, 它具有较好的抗多径衰弱的能力,能够支持多用户接入。
matlab2022a仿真结果如下: 3.MATLAB核心程序 pilot_sym = pilot_generator(128); % Generate the pilot symbols, all in BPSK modulation pilot_syms=pilot_sym'; pilot_syms=pilot_syms(:)'; idx=0; for snr = 0:4:40 idx=idx+1; nframe = 0; ...
matlab2022a仿真结果如下: 3.MATLAB部分代码预览 %参数初始化 Ta_num = 2;%发送天线数目 Ra_num = 2;%接收天线数目 %导频 mod_type = 'QPSK'; IFFT_len = 64; Carriers = 50; bits_symbol = 2; symbols_per_carrier = 12; %导频间隔
OFDM Modulation with Corresponding Parameters For comparison, we review the existing OFDM modulation technique, using the full occupied band, however, without a cyclic prefix. Get for symIdx = 1:numSymbols inpData2 = randi([0 1], bitsPerSubCarrier*L, 1); modData = qammod(inpData2, 2^...
Copy Code Copy Command Step 5 of 5 in OFDM Modulation Using MATLABThis example modifies an OFDM+CP signal to efficiently output an oversampled waveform from the OFDM modulator. Configure the simple case with the sample rate related to subcarrier spacing and FFT length....