摘要
高可靠低时延通信技术是目前无线通信领域的热点问题之一,其关键在于高性能的中短码长信道编码技术的实现.与以往长码设计不同的是,在有限码长下,编码速率受误码率性能制约,因而需要针对性地进行编码构造、译码算法设计以及编码性能分析与优化.目前已有面向中短码长的极化码、咬尾卷积码等编码技术的研究,但主要都是面向特定码长码率的优化设计,难以满足实际应用对灵活编码参数的要求.基于此,本文对中短码长编码技术进行全面归纳梳理与深度探讨分析,首先综述了现有有限码长编码性能界的理论分析方法,随后对近年来提出的编码技术进行了梳理,并分析比较每种编码技术的优缺点,最后详细探讨了针对低时延高可靠场景的新型编码技术,并对未来研究方向与发展趋势进行探讨和展望.
One of the hottest topics in the field of wireless communication is ultra-reliable and low-latency communication(URLLC),where channel coding with short-and-medium length plays a critical role.Unlike the case for long codes,in the finite code length regime,the coding rate is constrained by the error performance,thus tailored coding construction,decoding algorithm design,and performance analysis and optimization are required.At present,there are studies on coding technologies such as polar codes and tail-biting convolutional codes for short-and-medium length codes,but they are mainly optimized designs for specific code lengths and rates,which are difficult to meet the requirements of flexible coding for practical applications.Based on this,this paper summarizes and discusses the state-of-the-art coding technology for shortand-medium length.Firstly,we review the theoretical bounds for the performance of finite-length codes.Then,we analyze the coding technologies proposed in recent years,and compare their advantages and disadvantages.Finally,we discuss in detail new coding technologies for URLLC,and we prospectively explore the future research directions and development trends of channel coding techniques for ultra-reliable and low-latency communication.
作者
蔡穗华
王义文
白宝明
马啸
CAI Sui-hua;WANG Yi-wen;BAI Bao-ming;MA Xiao(School of Computer Science and Engineering,Sun Yat-sen University,Guangzhou,Guangdong 510006,China;MoE Key Laboratory of Information Technology,Sun Yat-sen University,Guangzhou,Guangdong 510006,China;Guangdong Key Laboratory of Information Security Technology,Sun Yat-sen University,Guangzhou,Guangdong 510006,China;State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an,Shaanxi 710071,China)
出处
《电子学报》
北大核心
2025年第2期629-644,共16页
Acta Electronica Sinica
基金
国家重点研发计划(No.2021YFA1000500)
国家自然科学基金(No.62201626)。
关键词
信道编码
高可靠低时延通信
列表译码
有限码长容量
极化码
咬尾卷积码
双向叠加编码传输
channel coding
ultra-reliable and low-latency communication(URLLC)
list decoding
finite-length capacity
polar code
tail-biting convolutional code(TBCC)
twisted-pair superposition transmission(TPST)
