The soft cancellation list (SCANL) decoding algorithm for polar codes runs L soft cancellation (SCAN) decoders with different decoding factor graphs.Although it can achieve better decoding performance than SCAN algorithm, it has high latency.In this paper, a fast simplified SCANL (Fast-SSCANL) algorithm that runs L independent Fast-SSCAN decoders is proposed.In Fast-SSCANL decoder, special nodes in each factor graph is identified, and corresponding low-latency decoding approaches for each special node is propose first.Then, syndrome check aided Fast-SSCANL (SC-Fast-SSCANL) algorithm is further put forward.The ordinary nodes satisfied the syndrome check will execute hard decision directly without traversing the factor graph, thereby reducing the decoding latency further.Simulation results show that Fast-SSCANL and SC-Fast-SSCANL algorithms can achieve the same BER performance as the SCANL algorithm with lower latency.Fast-SSCANL algorithm can reduce latency by more than 83% compared with SCANL, and SC-Fast-SSCANL algorithm can reduce more than 85% latency compared with SCANL regardless of code length and code rate.

Choangyang Liu

Wenjie Dai

Rui Guo

KSII Transactions on Internet and Information Systems

KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS (TIIS) 是被 SCIE (THOMSON REUTERS) 和 SCOPUS (ELSEVIER) 检索的在线学术期刊，由 KSII 出版并得到 KETI 的支持。交易每隔一个月发布一次。交易旨在让读者在与有线和无线互联网和信息系统相关的多个重点领域获得最先进的技术。 IT 的技术和应用正在迅速变化和更新。因此，向研究人员、开发人员、部署工程师、技术经理和教育工作者快速发布和分发至关重要。我们最重要的目标是在收到稿件后迅速发表被录用的论文。

KSII Transactions on Internet and Information Systems (TIIS) is an online academic journal published by KSII and supported by KETI, indexed by SCIE (THOMSON REUTERS) and SCOPUS (ELSEVIER). The journal is published bi-monthly and aims to provide readers with cutting-edge technologies related to wired and wireless internet and information systems. The technologies and applications in IT are rapidly evolving, making it essential to quickly publish and disseminate research findings for researchers, developers, deployment engineers, technical managers, and educators. Our primary goal is to swiftly publish accepted papers upon receipt of submissions.

KSII Transactions on Internet and Information Systems (TIIS) 是一本由 KSII 出版并得到 KETI 支持的在线学术期刊，已被 SCIE (THOMSON REUTERS) 和 SCOPUS (ELSEVIER) 检索。该期刊每隔一个月发布一次，旨在为读者提供与有线和无线互联网及信息系统相关的前沿技术。信息技术的技术和应用正在迅速变化，因此，快速发布和传播研究成果对研究人员、开发人员、部署工程师、技术经理和教育工作者至关重要。我们的主要目标是在收到稿件后迅速发表被录用的论文。

Category	Quartile
计算机科学	4
计算机科学, 计算机信息系统	4
计算机科学, 电信学	4

Syndrome Check aided Fast-SSCANL Decoding Algorithm for Polar Codes

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