一种简单递归编码结构的QC-LDPC码优化设计

Optimization of QC-LDPC Codes with Simple Recursive Encoding Structure

结合差分进化(Differential Evolution)和PEXIT(Protograph Exitrinsic Information Transfer)方法,提出了一种具有Tam结构的QC-LDPC码优化设计方法,Diff-PEXIT算法,在优化搜素时,保持了低编码复杂度的QCLDPC码的简单编码结构不变.仿真结果表明,Diff-PEXIT算法优化设计的QC-LDPC码性能优于802.16e中的QC-LDPC码和Tam提出的QC-LDPC码,且优化构造出的QC-LDPC码仍然保持了Tam码的简单递归编码结构及低编码复杂度.

This paper presented a novel QC LDPC codes optimization method, Di{f-PEXIT algorithm. The simple recursive encoding structure of QC LDPC codes is remained during the optimization process. Simulation results show that the BER performance of proposed QC-LDPC code is better than that of 802. 16e code and Tam code.