| 摘要: |
| 提出了一种基于置换矩阵的非规则低密度奇偶校验（LDPC）码的校验矩阵设计方法。这
种新的校验矩阵的设计以单位矩阵的循环移位阵为基本单元，目的是通过对上三角矩阵进行
矩阵变换、行和列的位置交换等方法减少1的个数，从而避免短环长度为4的出现。仿真
结果表明，当迭代次数增大到10时，误码率曲线得到很好的改善，并且可以得到0930码率
。 |
| 关键词: LDPC码 置换矩阵 校验矩阵 码率 |
| DOI： |
|
| 基金项目: |
|
| Design of Parity Check Matrix for Irregular LDPC Codes |
| ZHANG Yan,HU Xiao-li,SONG Wei-jun |
| (Nanjing College of Information Technology,Nanjing 210046,China) |
| Abstract: |
| A design of parity check matrix for Irregular LDPC codes based on per
mutation matrix is proposed in this paper.The paritycheck matrix is composed
of blocks of circulant matrices and the purpose is to reduce the number of “1”
in
the upper triangle by applying matrix transposition, and row and column intercha
nge to avoid the cycle of 4. Simulation result shows that BER can be improved at
10 ite
rations,and the code rate of 0.930 is obtained. |
| Key words: LDPC code permutation matrix check matrix code rate |
