具有高速并行译码结构LDPC码的构造  

Constructing of LDPC Code with High Speed Parallel Decoding Structure

作　　者：刘策伦[1] 卜祥元[1] 安建平[1] 

机构地区：[1]北京理工大学信息与电子学院

出　　处：《北京理工大学学报》2010年第8期978-982,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(60972018)

摘　　要：针对可实现高速并行译码的低密度校验（LDPC）码,提出了一种LDPC码的构造方法.该方法用代数的方法构造一个校验矩阵,适当地选择构造时的参数,可以消除校验矩阵中的小环,以保证所构造码字的性能;再按照一定的规则对所构造校验矩阵的行进行重新排列,可使得重排后的矩阵具有分块结构.仿真结果表明,采用这种分块结构,使得LDPC码的部分并行译码在工程实现上成为可能,按照该方法构造的LDPC码的性能与随机构造的码字相当.A method for constructing low-density parity-check （LDPC）code that can be implemented with high speed parallel decoding structure is proposed.Firstly,aparity-check matrix is generated with algebraic method.The short circles in the matrix can be eliminated by selecting proper parameters,so that the generated code has good performance.Then rearrange the rows of the generated parity-check matrix with specific rules to make the rearranged matrix has block structure.With the block structure,the partial parallel decoding of LDPC code can be realized in engineering,and a lot of resources can be saved.The simulation results show that the performance of constructed LDPC code is also very good and is equal to the random code.

关 键 词：LDPC码 并行译码 分块矩阵 BP算法 

分 类 号：TN911[电子电信—通信与信息系统]