In this paper, we introduce two novel methods to design outer polar codes for two previously proposed concatenated polar code architectures: augmented polar codes and local-global polar codes. These methods include a stopping set (SS) construction and a nonstationary density evolution (NDE) construction. Simulation results demonstrate the advantage of these methods over previously proposed constructions based on density evolution (DE) and LLR evolution.

翻译：本文针对两种此前提出的级联极化码架构——增强型极化码和局部-全局极化码，提出了两种新颖的外极化码设计方法。这些方法包括停止集构造和非平稳密度进化构造。仿真结果表明，与基于密度进化和LLR进化的先前构造相比，这些方法具有显著优势。