面向特殊节点的低延时Polar码构造研究  

Low-Latency Code Construction Research of Polar Codes for Special Nodes

作　　者：符川东 赵明敏[1] 李荣鹏[1] 李旻[1] 赵民建[1] FU Chuandong;ZHAO Mingmin;LI Rongpeng;LI Min;ZHAO Minjian(College of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310013,China)

机构地区：[1]浙江大学信息与电子工程学院,浙江杭州310013

出　　处：《移动通信》2025年第2期43-50,共8页Mobile Communications

基　　金：国家自然科学基金面上项目“基于业务感知的内生智能通信网络研究”(62071425);中央高校基础基金(226-2022-00195);浙江省杰出青年基金项目“面向移动分布式智能业务的任务中心网络”(LR23F010005)。

摘　　要：现有的Polar码构造研究主要集中在提升码序列的译码性能方面。然而,在基于特殊节点的快速译码器当中,码序列不仅影响译码性能,还通过决定特殊节点的分布影响译码时延。基于此,提出一种低时延码构造方案,通过优化特殊节点分布的方式降低快速译码器的译码时延。所提出的方案基于遗传算法,采用了分步优化策略:先提升码序列的译码性能,再优化特殊节点分布以降低译码时延。仿真结果表明,与现有码序列相比,通过低时延码构造方案获得的码序列译码性能不退化,并且译码时延有了最大50%的降低。Existing research on Polar code construction has primarily focused on improving the decoding performance of code sequences.However,in special nodes-based fast decoders,the code sequence not only influences decoding performance but also impacts decoding latency by determining the distribution of special nodes.In light of this,a low-latency code construction scheme is proposed to reduce the decoding latency in fast decoders by optimizing the distribution of special nodes.The proposed scheme is based on genetic algorithms and adopts a staged optimization strategy,where the decoding performance of the code sequence is first improved and then the distribution of special nodes is optimized to reduce decoding latency.Simulation results show that,compared with the existing code sequence,the code sequences obtained through the low-latency code construction scheme achieve no degradation in decoding performance and reduce decoding latency by up to 50%.

关 键 词：Polar码 码构造 特殊节点 低时延 遗传算法 

分 类 号：TN929.5[电子电信—通信与信息系统]