Two Rank Sorting for Successive Cancellation List Decoding of Polar Codes
Dafa Wen, Ming Zhou Zhan, Chenchang Gao, Zhong Tang, Lan Xiao, Jian Li · IECON 2022 – 48th Annual Conference of the IEEE Industrial Electronics Society · 2022
In the successive cancellation list decoding of polar codes, the metric sorting is mostly responsible for the total delay. We propose a two-rank-sorter method to save hardware resources and avoid conducting redundant sorting operations on measurements. It includes two rank sorters as well as a clean half sorter. The rank sorter approach differs from previous compare-and-exchange units (CAEUs) in that it produces an ordered output using a logical comparator. The evaluation results demonstrate that when the list size is modest, the suggested design performs better in terms of hardware complexity than the current sorting architecture.