一种旋转重复累积(RA)码的设计

文中分析了重复累积(RA)码的结构特点以及编码过程,设计了一种采用旋转结构的重复累积码.该码具有低密度码的特点和优点,同时具有旋转结构,编码简单,译码方便,易于调整码率,易于硬件实现等特点.文中给出了由置换子矩阵的索引确定交织序列的算法.仿真结果表明,长度适合的RA码性与通过复杂方法构造出来的码字性能接近.

Design of Rotation Repeat Accumulation Codes

In this paper, the characteristics and encoding process of Repeat Accumulation (RA) codes is analyzed first, and then a RA code with rotation structure is proposed, which has simple encoding structure and is easy to implement in circuit. The interleave algorithm based on the index of permutation unit matrix is also provided. Simulation results indicate that this code performs as well as regular low density parity check code based on completely random matrix construction.