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：本文针对两种先前提出的级联极化码架构——增强极化码和局部-全局极化码——提出了两种设计外极化码的新方法。这些方法包括停止集（SS）构造和非平稳密度进化（NDE）构造。仿真结果表明，与先前基于密度进化（DE）和对数似然比（LLR）进化的构造相比，这些方法具有明显优势。