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一种基于增强奇偶校验码级联极化码的新型编译码方法
A novel method for encoding and decoding based on enhanced parity-check-concatenated polar codes
- 电信科学 2021年37卷第3期 页码：125-132
- 作者机构：
- 作者简介：
[ "王燕（1997- ），女，杭州电子科技大学硕士生，主要研究方向为无线协作通信、信道编码等。" ]
[ "刘顺兰（1965- ），女，杭州电子科技大学教授，主要研究方向为信息与信号处理、无线通信等。" ]
[ "奚珍珍（1995- ），女，杭州电子科技大学硕士生，主要研究方向为信息与信号处理、无线通信等。" ]
[ "包建荣（1978- ），男，博士，杭州电子科技大学教授，主要研究方向为空间无线通信、通信信号处理与自主无线电等。" ]
- 基金信息：浙江省自然科学基金资助项目;The Zhejiang Provincial Natural Science Foundation of China(LY18F010013);国家自然科学基金资助项目;The National Natural Science Foundation of China(U1809201)
DOI：10.11959/j.issn.1000-0801.2021033
中图分类号： TN925-
网络出版日期：2021-03，
纸质出版日期：2021-03-20
- 稿件说明：
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王燕, 刘顺兰, 奚珍珍, 等. 一种基于增强奇偶校验码级联极化码的新型编译码方法[J]. 电信科学, 2021,37(3):125-132.
Yan WANG, Shunlan LIU, Zhenzhen XI, et al. A novel method for encoding and decoding based on enhanced parity-check-concatenated polar codes[J]. Telecommunications science, 2021, 37(3): 125-132.
王燕, 刘顺兰, 奚珍珍, 等. 一种基于增强奇偶校验码级联极化码的新型编译码方法[J]. 电信科学, 2021,37(3):125-132. DOI： 10.11959/j.issn.1000-0801.2021033.
Yan WANG, Shunlan LIU, Zhenzhen XI, et al. A novel method for encoding and decoding based on enhanced parity-check-concatenated polar codes[J]. Telecommunications science, 2021, 37(3): 125-132. DOI： 10.11959/j.issn.1000-0801.2021033.
摘要
极化码作为一种纠错码，具有较好的编译码性能，已成为 5G 短码控制信道的标准编码方案。但在码长较短时，其性能不够优异。提出一种基于增强奇偶校验码级联极化码的新型编译码方法，在原有的奇偶校验位后设立增强校验位，对校验方程中信道可靠度较低的信息位进行双重校验，辅助奇偶校验码在译码过程中对路径进行修剪，以此提高路径选择的可靠性。仿真结果表明，在相同信道、相同码率码长下，本文提出的新型编译码方法比循环冗余校验（cyclic redundancy check，CRC）码级联极化码、奇偶校验（parity check
PC）码级联极化码误码性能更优异。在高斯信道下，当码长为128、码率为1/2、误码率为10
-3
时，本文提出的基于增强PC码级联的极化码比PC码级联的极化码获得了约0.3 dB增益，与CRC辅助的极化码相比获得了约0.4 dB增益。
Abstract
Polar codes have perfect coding and decoding performance as a kind of error correction code
which have become a standard coding scheme for 5G short code control channel. While the length of polar codes is short
its performance is not good enough. A novel method for encoding and decoding based on enhanced parity-check-concatenated polar codes was proposed. The enhanced check bit was set up after the parity-check (PC) bit to check the information bits with low channel reliability again
which could help path metric value prune the decoding path and improve the reliability of decoding path selection. The simulations reveal that the proposed method has better performance than cyclic redundancy check (CRC) concatenated polar codes and PC concatenated polar codes under the same channel
code length and code rate conditions. In additive white Gaussian noise channel
when the code length is 128
the code rate is 1/2 and the bit error rate is 10
-3
the proposed method achieves a gain of about 0.3 dB over the PC codes cascaded polar codes
about 0.4 dB over the CRC assisted polar codes.
关键词
Keywords
references
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