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arXiv 2302.07513cs.ITmath.IT
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用于短消息的卷积码和极化码的CRC辅助列表解码的设计、性能和复杂度

Design, Performance, and Complexity of CRC-Aided List Decoding of Convolutional and Polar Codes for Short Messages

Jacob King, Hanwen Yao, William Ryan, Richard D. Wesel

摘要:

出于在5G及更高版本中传输短控制消息的需求,本文仔细设计了用于循环冗余校验(CRC)辅助的咬尾卷积码(TBCC)和极化码的列表解码的代码。这两种代码都使用11位CRC和512个传输位发送32位消息。我们的目标是提供一个仔细的,公平的比较的错误性能和解码复杂度的极性和TBCC技术的特定情况下。具体地,TBCC被设计为匹配(512,43)极化码的速率,并且针对两个码设计最优的11比特CRC。本文研究了极化码和TBCC码的距离谱,阐明了两种码类型的不同距离结构。我们考虑自适应和非自适应CRC辅助列表解码方案。对于极化码,自适应解码器必须以较大的列表大小开始以避免错误平层。对于具有11位CRC的速率32/512码,优化的CRC-TBCC设计实现了比优化的CRC极性设计更低的总故障率。仿真表明,优化的CRC-TBCC设计实现了比优化的CRC-极性设计显著更高的吞吐量,使得TBCC解决方案实现了更低的总故障率,同时需要更少的计算复杂性。

英文摘要:

Motivated by the need to communicate short control messages in 5G and beyond, this paper carefully designs codes for cyclic redundancy check (CRC)-aided list decoding of tail-biting convolutional codes (TBCCs) and polar codes. Both codes send a 32-bit message using an 11-bit CRC and 512 transmitted bits. We aim to provide a careful, fair comparison of the error performance and decoding complexity of polar and TBCC techniques for a specific case. Specifically, a TBCC is designed to match the rate of a (512, 43) polar code, and optimal 11-bit CRCs for both codes are designed. The paper examines the distance spectra of the polar and TBCC codes, illuminating the different distance structures for the two code types. We consider both adaptive and non-adaptive CRC-aided list decoding schemes. For polar codes, an adaptive decoder must start with a larger list size to avoid an error floor. For rate-32/512 codes with an 11-bit CRC, the optimized CRC-TBCC design achieves a lower total failure rate than the optimized CRC-polar design. Simulations showed that the optimized CRC-TBCC design achieved significantly higher throughput than the optimized CRC-polar design, so that the TBCC solution achieved a lower total failure rate while requiring less computational complexity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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