摘要
采用直接观察校验子S中非零元素个数的方法来确定LDPC译码器迭代译码的收敛情况,提出了一种低复杂度的提前结束迭代准则.在不需要经过复杂的计算便可确定迭代译码的收敛情况,从而可以根据系统的实际需要实现性能和平均迭代次数的折衷.在CMMB标准下,对800×9216个LDPC码字仿真表明该准则能在很小的性能损失的情况下很大程度地降低平均迭代次数.与现有的几种经典的提前结束迭代准则相比该准则具有性能良好、低复杂度和硬件消耗少的特点.
A low-complexity early stopping criterion has been developed by directly observing the number of non-zeros in the check matrix during each iteration of LDPC decoder. Instead of a great number of complex computations, the new approach needs only a few simple operations. Simulation results of 800×9 216 LDPC codes in CMMB system proved that the proposed approach could greatly reduce the average iteration numbers with only a few performance degradations. Compared with the classic criterions, the proposed criterion has low complexity, little performance degradation and only little hardware consumption.
出处
《微电子学与计算机》
CSCD
北大核心
2010年第5期50-52,56,共4页
Microelectronics & Computer
