论文标题
通过混合位标记的极地编码调制
Polar Coded Modulation via Hybrid Bit Labeling
论文作者
论文摘要
位间隔的编码调制（BICM）和多级编码调制（MLC）通常用于将极地代码与高阶调制相结合。尽管BICM受益于简单设计以及编码和调制的分离，但MLC在连续的策略解码下显示出更好的性能。在本文中，我们提出了一个位于BICM和MLC之间的混合极性编码调制方案，其中将一小部分位分配给了集合分区（SP）标记，其余部分则分配给灰色标记。 SP标记的位进行顺序解调，使用迭代解调和类似于MLC的极性解码，而灰色标记的位首先并行解调，然后发送用于类似于BICM的解码。极性代码或其他通道代码（例如LDPC代码）都可以用于灰色标记的位。对于256-QAM上的长度2048速率1/2极性代码，BICM（仅灰色标签）和MLC（仅SP标记）之间的性能差距几乎可以被混合方案完全封闭。值得注意的是，混合方案比MLC具有显着的延迟优势。这些绩效增长使提出的计划对未来的通信系统（例如6G）有吸引力。
Bit-interleaved coded modulation (BICM) and multilevel coded modulation (MLC) are commonly used to combine polar codes with high order modulation. While BICM benefits from simple design and the separation of coding and modulation, MLC shows better performance under successive-cancellation decoding. In this paper we propose a hybrid polar coded modulation scheme that lies between BICM and MLC, wherein a fraction of bits are assigned to set-partition (SP) labeling and the remaining bits are assigned for Gray labeling. The SP labeled bits undergo sequential demodulation, using iterative demodulation and polar decoding similar to MLC, whereas the Gray labeled bits are first demodulated in parallel and then sent for decoding similar to BICM. Either polar codes or other channel codes (such as LDPC codes) can be used for the Gray labeled bits. For length 2048 rate 1/2 polar code on 256-QAM, the performance gap between BICM (Gray labeling only) and MLC (SP labeling only) can be almost fully closed by the hybrid scheme. Notably, the hybrid scheme has a significant latency advantage over MLC. These performance gains make the proposed scheme attractive for future communication systems such as 6G.
