LDPC ( Low-density Parity-check,低密度奇偶校验)码是由Gallager在1963年提出的一类具有稀疏校验矩阵的线性分组码(linear block codes),然而在接下来的30年来由于计算能力的不足,它一直被人们忽视。1996年,D MacKay、M Neal等人对它重新进行了研究,发现LDPC码具有逼近香农极限的优异性能。并且具有译码复杂度低、可...
rec1 = I+sigma*randn(1,n); est_code22 = BP_decode(rec1,H,sigma, IterNum); est_code2 = est_code22(1:k); err1 = length(find(est_code2~=msg)); Err1 = Err1+err1; end BER3(ij) = Err1/(Nerr*k); end for ij=1:length(EbN0db) ij en2 = 10^(EbN0db(ij)/10); sigma...
Matlab code for Digital Communication Experiments/Lab. VRC code generation and error detection, CRC code generation and error detection, Linear block code generation and error detection, Error detection and correction using hamming coding, Line code generation Unipolar NRZ, polar NRZ, bipolar NRZ, ...
LDPC ( Low-density Parity-check,低密度奇偶校验)码是由 Gallager 在1963 年提出的一类具有稀疏校验矩阵的线性分组码 (linear block codes),然而在接下来的 30 年来由于计算能力的不足,它一直被人们忽视。1996年,D MacKay、M Neal 等人对它重新进行了研究,发现 LDPC 码具有逼近香农极限的优异性能。并且具有译码...
给定的编码矩阵 H_block 是一个18x36的矩阵(Matrix(2016,1008)Block56.mat文件中也是只有18x36个数据),矩阵中每个元素 H(i,j) 是大小为 z*z 的循环移位矩阵(给定z=56),行重为1,它的值表示该矩阵的循环位移偏移量,也是第一行中元素1所处的列的位置,若H(i,j)值为0,表示是全0矩阵。
MATLAB functions, Simulink, and Simscape blocks created from symbolic expressions using matlabFunction, matlabFunctionBlock, and simscapeEquation. Not Supported: Creation of symbolic expressions such as using sym, syms, and str2sym. Supported: All blocks created from symbolic expressions that support co...
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(to specify the dipole moment), while the values of the dipoletilt angle psi (in radians) and its sine (sps) and cosine (cps) can be explicitlyspecified and forwarded to the common block geopack1 (11th, 12th, and 16th elements, resp.):param xi,yi,zi: gsm coords of initial point (...
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 LDPC ( Low-density Parity-check,低密度奇偶校验)码是由 Gallager 在1963 年提出的一类具有稀疏校验矩阵的线性分组码 (linear block codes)…
LDPC ( Low-density Parity-check,低密度奇偶校验)码是由 Gallager 在1963 年提出的一类具有稀疏校验矩阵的线性分组码 (linear block codes),然而在接下来的 30 年来由于计算能力的不足,它一直被人们忽视。1996年,D MacKay、M Neal 等人对它重新进行了研究,发现 LDPC 码具有逼近香农极限的优异性能。并且具有译码...