MATLAB Code for QPSK Modulation and Demodulation 因为在学习5G物理层，一直很忙，没有时间。最近稍有...
The code snippet provided in the previous section demonstrates how QPSK modulation and demodulation can be implemented using MATLAB. The code generates a random QPSK modulated signal, displays the signal in a scatter plot, and then performs QPSK demodulation to recover the original digital data. The...
ldpc_code = mod(Trans_data*G,2); %DSSSpseudoNumber =round(rand(1,fp)'); [dsss,converted,PN2] = func_dsss(ldpc_code,pseudoNumber,fp); Trans_QPSK = QPSK_modulation(dsss);%通过高斯信道Rec_QPSK = awgn(Trans_QPSK,SNR(i),'measured'); ReData = QPSK_demodulation(Rec_QPSK);%DSSSdsss2...
MATLAB Release Compatibility Created with R2008a Compatible with any release Platform Compatibility Windows macOS Linux Others Also Downloaded 8PSK Modulation and Demodulation in the presence of transmitter and channel impairments 1.1K Downloads MATLAB Code for QPSK Modulation and Demodulation 18.1K ...
1.算法仿真效果 matlab2022a仿真结果如下: 2.算法涉及理论知识概要 与很多的通信技术类似,扩频技术最初也应用于保密通信和制导系统等军事技术。除了在军事通信中的应用,扩频技术在无线通信领域也有发展。目前扩频通信技术已经在测距、卫星通信、GPS导航定位、移动通信、
常用的调制方式有QPSK、16QAM和64QAM。 QPSK调制: QPSK调制将每两个比特映射到一个复平面上的相位点。假设接收到的解扩信号为r_I[n]和r_Q[n],则QPSK调制后的信号为x[n] = r_I[n] + j*r_Q[n],其中j为虚数单位。 16QAM调制: 16QAM调制将每四个比特映射到一个复平面上的相位点。假设接收到的解扩...
Trans_BPSK = QAM64_modulation(dsss); %通过高斯信道Rec_BPSK = awgn(Trans_BPSK,SNR(i),'measured'); ReData = QAM64_demodulation(Rec_BPSK); %DSSS dsss2 = func_dsss2(ReData,pseudoNumber,fp); x_hat = round([dsss2+1]/2); [nberr,rat]= biterr(x_hat,Trans_data); ...
To perform the OFDM modulation we invoke the lteOFDMDemodulate and lteDLChannelEstimate functions in LTE System Toolbox: % Perform OFDM demodulation including cyclic prefix removal rxgrid = lteOFDMDemodulate(enb, waveform); % Estimate the channel on the middle 6 RBs [ChannelEst, noise...
Modsel = 2; %QPSK Fs = 10*10^3; %采样率 Ts = 1/Fs; Fc = 5*10^3; %载波频率 Fd = 10; %多普勒频移 tau = [0 0.5 0.5 1.2 1.2 2.1 2.1 3.3 3.3 4.8 4.8 6.5 6.5 8.5 10.8]*10^-4; pdb = [0 -0.967 -0.967 -0.967 -1.933 -1.933 -1.933 -1.933 -2.900 -2.900 -2.900 -2.90...
简介:m基于扩频解扩+LDPC编译码的通信链路matlab误码率仿真,调制对比QPSK,16QAM,64QAM,扩频参数可设置 1.算法仿真效果 matlab2022a仿真结果如下: 2.算法涉及理论知识概要 在现代通信系统中,扩频技术被广泛应用于数字通信链路中。扩频技术通过将要传输的信息序列与一个宽带的伪随机码序列进行卷积,将原始信号转换成一个...