基于多元软可靠度的LDPC译码研究

Research on Soft-reliability-based for Non-binary LDPC Decoding

与二元LDPC(low-density parity-check,LDPC)码相比多元LDPC码具有一些优势,但它们的译码复杂度高是实现过程中的一个重大挑战。根据多元LDPC码存在的这个问题,提出了基于迭代软可靠度的比例逻辑截断机制算法,该算法仅涉及有限域加法和乘法以及整数运算,并且它可将变量节点划分为处理和非处理节点两部分,在迭代过程中只有部分变量节点参与实际的信息处理,因此具有较低的译码复杂度。通过与ISRB、IISRB及RS-IISRB算法进行仿真对比试验,所提算法具有更好的性能。由于该算法纠错性能好、复杂度较低的优点使其在无线通信与光通信等领域有更广泛的应用。

Comparing with binary low-density parity-check(LDPC)codes,non-binary codes really have some advantages,but its high complexity decoding is a big challenge for implementation.For resolving the problem,the proportional logic truncation mechanism algorithm based on iterative soft-reliability is proposed because the algo?rithm only involves finite field addition,multiplication and integer operations,and it can divide variable nodes into processing and non-processing nodes.Only some of the variable nodes participate in the actual information process?ing in the iterative process,so the algorithm has lower decoding complexity than other algorithms.Comparing with ISRB,IISRB and RS-IISRB algorithms through simulation experiments,the proposed algorithm has better perfor?mance.It has widely application in radio and optical communication for its good error-correcting performance and low complexity.