With the enhanced performance and convergence speed than their binary counterparts, NB-LDPC codes have been considered for emerging wireless communication and storage applications. However, one challenging issue to apply NB-LDPC codes in low-power embedded applications is the high decoding complexities. In this paper, we propose a comprehensive message length control technique that adaptively truncates decoding messages according to the domain-specific information. The number of arithmetic operations and memory accesses can be greatly reduced with shorter decoding messages. To implement the proposed technique, we propose a sequential decoder architecture which controls the decoding message length. Evaluation results show that the proposed technique can achieve significant power reduction than the conventional techniques while maintaining the same decoding performance.

NB-LDPC码具有比其二进制同类产品更高的性能和收敛速度，因此已经考虑将其用于新兴的无线通信和存储应用。然而，在低功率嵌入式应用中应用NB-LDPC码的一个挑战性问题是高解码复杂性。在本文中，我们提出了一种综合的消息长度控制技术，该技术可根据特定于域的信息自适应地截断解码消息。较短的解码消息可以大大减少算术运算和存储器访问的次数。为了实现所提出的技术，我们提出了一种控制解码消息长度的顺序解码器架构。