Ren, YuqingKristensen, Andreas ToftegaardShen, YifeiBalatsoukas-Stimming, AlexiosZhang, ChuanBurg, Andreas2023-01-022023-01-022023-01-022022-01-0110.1109/TSP.2022.3216921https://infoscience.epfl.ch/handle/20.500.14299/193534WOS:000894880300007Due to the low-latency and high-reliability require-ments of 5G, low-complexity node-based successive cancellation list (SCL) decoding has received considerable attention for use in 5G communications systems. By identifying special constituent codes in the decoding tree and immediately decoding these, node-based SCL decoding provides a significant reduction in decoding latency compared to conventional SCL decoding. However, while there exists many types of nodes, the current node-based SCL decoders are limited by the lack of a more generalized node that can effi-ciently decode a larger number of different constituent codes to further reduce the decoding time. In this paper, we extend a recent generalized node, the sequence repetition (SR) node, to SCL decod-ing, and describe the first implementation of an SR-List decoder. By merging certain SR-List decoding operations and applying various optimizations for 5G New Radio (NR) polar codes, our optimized SR-List decoding algorithm increases the throughput by almost 2x compared to a similar state-of-the-art node-based SCL decoder. We also present our hardware implementation of the optimized SR-List decoding algorithm which supports all 5G NR polar codes. Synthesis results show that our SR-List decoder can achieve a 2.94 Gbps throughput and 6.70 Gbps/mm2 area efficiency for L = 8.Engineering, Electrical & ElectronicEngineeringindex terms-polar codessuccessive cancellation decodinglist decodingnode-based sclsequence repetition (sr)hardware implementationlow-latency5g nrwireless communicationsarchitectureoperationtext::journal::journal article::research article