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QC_codes
- Construct the short length of QC LDPC codes without girth 4 and girth 6-The Program to construct the short length of QC LDPC codes without girth 4 and girth 6 Copyright (C) Yang XIAO, Jun FAN, BJTU, July 26, 2007, E-Mail: yxiao@bjtu.edu.cn.
boundsonLDPCandLDGM
- The paper is about bounds for LDPC and LDGM codes under MAP. A new method for analyzing low density parity check (LDPC) codes and low density generator matrix (LDGM) codes under bit maximum a posteriori probability (MAP) decoding is introduced. T
LDPCtutorial
- Low-density parity-check (LDPC) codes are a class of linear block LDPC codes. The name comes from the characteristic of their parity-check matrix which contains only a few 1’s in comparison to the amount of 0’s. Their main advantage is that the
Encoders_for_Block_Circulant_LDPC_Codes
- In this paper, we present two encoding methods for block-circulant LDPC codes. The first is an iterative encoding method based on the erasure decoding algorithm, and the computations required are well organized due to the blockcirculant struc
shift_choosing
- 这个程序 是用来为QC-LDPC 的parity check matrix 选择 shift values的. 其中 0 matrix 的shift value为-1.-this program is used to assign the shift values for parity-check matrix of the QC-LDPC codes. The shift value of the zero matrix is-1.
IRA_H_generate
- IRA码的H矩阵的产生，在已知度分布后的H矩阵的产生。-IRA code H-matrix is generated, in a known degree distribution, production of H-matrix
QC_codes
- it is a ldpc parity check matrix
makeLdpc
- LDPC编码算法, Create R = 1/2 low density parity check matrix M : Number of row N : Number of column method : Method for distributing non-zero element {0} Evencol : For each column, place 1s uniformly at random {1} Evenboth: For each
checkcycle6
- 查找ldpc校验矩阵中的6环，并将其记录到txt文件中-Find ldpc check matrix of the six rings, and its records to a txt file
83390051ldpc_decode_matlab
- LDPC codec source code can be generated non-arbitrary rules binary check matrix, LLR BP decoding can be carried out
cycle test algrithm
- lDPC校验矩阵的环检测。包括4环检测算法，6环检测算法及8环检测算法。还包括一个准循环LDPC奇偶校验矩阵的生成算法。-this algrithm can search cycles in LDPC parity check matrix。It contain cycle-4 cycle-6 cycle-8 test algrithm.It also contains a algrithm for generate the LDPC quasi-cyclic parity check matr
3-5LDPC
- 3-5循环移位码是LDPC码准循环码中一种典型的构造校验矩阵的方法，较小的（155 64）码通常也是对比测试其他码的性能好坏的重要测试标准，程序详细描述了构造的步骤和方法，结果是采用AList的结果存储方法，译码性能可以由BP迭代译码直接得出-3-5 cyclic shift LDPC codes are quasi-cyclic codes in the code structure of a typical calibration matrix method, the smaller (15
genH
- LDPC码的生成矩阵，matlab算法实现-Generator matrix of LDPC codes, matlab algorithm
GirthComputation
- C语言编写的对LDPC校验矩阵环4的计算程序-Compution girth4 of LDPC matrix
yxiao_DVBS2code
- 在DVB—S2中，LDPC码监督矩阵H的仿真，可以对其采用的LDPC码的性能进行验证-In the DVB-S2 ， LDPC code simulation monitoring matrix H can be used in its performance of LDPC codes to verify
LDPC_gallager
- 利用gallager的方案进行生成H矩阵，在高斯信道下得到误码率得性能仿真-The program generated using gallager H matrix, in the Gaussian channel bit error rate was obtained Simulation
Realization_of_FPGA_for_LDPC_encoding
- 低密度奇偶校验码(简称LDPC码)是目前距离香农限最近的一种线性纠错码，它的直接编码运算量较大，通常具有码长的二次方复杂度．为此，利用有效的校验矩阵，来降低编码的复杂度，同时研究利用大规模集成电路实现LDPC码的编码．在ISE 8．2软件平台上采用基于FPGA的Verilog HDL语言实现了有效的编码过程，为LDPC码的硬件实现和实际应用提供了依据-Abstract：Low．density parity·check code(LDPC code)is a kind of linear eror
SPA
- 首先介绍了LDPC码的校验矩阵和其因子表示方法，然后利用二分图对和积解码算法进行了详细的描述，最后给出了信度传播概率译码算法详细步骤，并对关键公式作了证明-This paper,first introduces the check matrix and the factor graph of LDPC,then describes the sum-product algorithm by using the factor graph,and finally presents the deta
ldpc_generate
- LDPC码即低密度奇偶校验码（Low Density Parity Check Code，LDPC），这是LDPC仿真中稀疏矩阵生成程序，我花了好几天的时间搞懂，并做了注释。 -LDPC codes that low-density parity check codes (Low Density Parity Check Code, LDPC), which is generated sparse matrix LDPC simulation program, I spent a few
LDPC-bin
- 2进制LDPC解码器，4000*6000 校验矩阵，速度快-LDPC binay decoder, 4000*6000 H checking matrix, high speed