【摘要】 基于LDPC码在译码和差错平底区域的一些特殊性质,提出了一种为GF(2)域上的LDPC码已编码码字增加纵向校验码字的方法。在阐述此方法的基础上,给出了此算法的电路结构,并着重从理论分析了其性能。最后通过仿真,表明随着LDPC码译码错误率的减小而其整体译码错误率成指数形式减小,由此,能有效降低原LDPC码的错误平底。更多还原

【Abstract】 Based on some characteristics of decoding and error-floors of low-density parity-check (LDPC) codes, an approach of adding vertical parity-check blocks to original LDPC blocks over GF(2) is proposed. The performance of this approach is analyzed and the circuits are also presented. Also, the simulation results show that the performance of the constructed LDPC codes can be improved significantly with low cost, as the block error probability (BEP) drops. Moreover, the error floors of LDPC codes can be impaired effectively.更多还原