A Low Latency SCAN-Flip Polar Decoder for 5G Vehicular Communication

A Low Latency SCAN-Flip Polar Decoder for 5G Vehicular Communication
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用于 5G 车辆通信的低延迟 SCAN-Flip Polar 解码器

DOI:
10.1007/978-3-030-14757-0_12
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发表时间:
2018-11
期刊:
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
影响因子:
--
通讯作者:
Zuocheng Xing
Zuocheng Xing
中科院分区:
其他
文献类型:
--
作者:
Yu Wang;Lirui Chen;Shikai Qiu;Li Huang;Zuocheng Xing

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极地代码被广泛认为是未来无线通信的最有希望的渠道代码之一。但是,在短期或中等的块长度上,在传统连续取消(SC)解码下的错误校正性能不如其他现代渠道代码,而在列表下,以高复杂性和长期延迟为代价,在列表下进行了分解的效果。与列表解码相比,连续的取消翻转(SCF)解码具有竞争性能,但遭受了较长的解码延迟。在这项工作中,我们通过将翻转想法引入软取消(扫描)解码来提出扫描式拨片解码算法。所提出的算法改善了软取消解码的误差校正性能,并加速了迭代计算的收敛性,从而导致执行时间较低。此外,我们还提出了一个新的路径度量,以进一步提高扫描式叉车解码器的性能。仿真结果表明,在同等帧错误率下,提出的解码器的平均迭代次数比SCF的平均迭代次数小得多。在等效的最大迭代次数时,以\(10^{ - 4} \)的位错误率扫描式扫描式误差性能超过0.25 dB。
Polar codes are widely considered as one of the most promising channel codes for future wireless communication. However, at short or moderate block lengths, their error-correction performance under traditional successive cancellation (SC) decoding is inferior to other modern channel codes, while under list decoding outperforms at the cost of high complexity and long latency. Successive cancellation flip (SCF) decoding is shown having competitive performance compared to that of list decoding but suffers from a long decoding latency. In this work, we propose the SCAN-Flip decoding algorithm by introducing the flipping idea into soft cancellation (SCAN) decoding. The proposed algorithm improves the error-correction performance of soft cancellation decoding and accelerates the convergence of iterative calculation, leading to lower execution-time. Besides, we also propose a new path metric to improve the performance of our SCAN-Flip decoder further. Simulation results show that the proposed decoder has a much smaller average number of iterations than that of SCF at equivalent frame error rate. At equivalent max number of iterations, the error-correction performance of SCAN-Flip outperforms SC-Flip by up to 0.25 dB at bit error rate of \(10^{-4}\).
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