According to the structure of Quasi-Cyclic LDPC code, we can make a trade-off between hardware complexity and decoding throughput by applying semi-parallel architecture. 利用准循环LDPC码的结构特点,使用半并行结构的译码器可以实现复杂度和译码速率的有效折中。
The last chapter is the main part of this paper, and we put forward some results on the binary image of K-cyclic code, cyclic code and quasi-cyclic code over Z_4. 第3章为本文的主体部分,给出了关于环Z4上的K-循环码,循环码和准循环码的二进制像的性质的一些结果。
A necessary and sufficient condition for the Gray image of quasi-cyclic code to be cyclic is given. 最后,证明了码C是环Zp[u]/(um-1)上一个循环码的充分必要条件为它的Gray映射下的像是一个准循环码。