极化码的多比特译码算法研究
针对极化码的连续消除列表(successive cancellation list,SCL)译码算法的高时延问题,提出了基于对数似然比的多比特SCL(multi-bit SCL,MSCL)译码算法,可以在一个判决时刻同时译出多个码字比特,在不损失译码性能的前提下,将译码时延由3N-2个时钟降为4N/M-2个时钟,相比于现有的多比特SCL译码算法,MSCL译码算法具有更低的路径度量值计算复杂度。为了降低循环冗余校验(cyclical redundancy check,CRC)辅助的SCL(CRC aided SCL,CA-SCL)译码算法的译码时延以及存储空间,提出了分段CRC辅助的MSCL(s...
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| Published in | 电信科学 Vol. 34; no. 11; pp. 77 - 86 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国通信学会
01.11.2018
人民邮电出版社有限公司 杭州电子科技大学通信工程学院,浙江杭州,310018 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-0801 |
| DOI | 10.11959/j.issn.1000-0801.2018261 |
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| Abstract | 针对极化码的连续消除列表(successive cancellation list,SCL)译码算法的高时延问题,提出了基于对数似然比的多比特SCL(multi-bit SCL,MSCL)译码算法,可以在一个判决时刻同时译出多个码字比特,在不损失译码性能的前提下,将译码时延由3N-2个时钟降为4N/M-2个时钟,相比于现有的多比特SCL译码算法,MSCL译码算法具有更低的路径度量值计算复杂度。为了降低循环冗余校验(cyclical redundancy check,CRC)辅助的SCL(CRC aided SCL,CA-SCL)译码算法的译码时延以及存储空间,提出了分段CRC辅助的MSCL(segmented CRC-aided MSCL,SCA-MSCL)译码算法,并提出了分段信息码字长度修正算法,来保证在信息位索引集A不变的前提下,实现每一分段结尾处对应的信息位索引能够被M整除。SCA-MSCL算法可以借助多个CRC判决来尽可能早地输出译码码字,从而减少译码器的存储空间以及译码时延。 |
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| AbstractList | 针对极化码的连续消除列表(successive cancellation list,SCL)译码算法的高时延问题,提出了基于对数似然比的多比特SCL(multi-bit SCL,MSCL)译码算法,可以在一个判决时刻同时译出多个码字比特,在不损失译码性能的前提下,将译码时延由3N-2个时钟降为4N/M-2个时钟,相比于现有的多比特SCL译码算法,MSCL译码算法具有更低的路径度量值计算复杂度。为了降低循环冗余校验(cyclical redundancy check,CRC)辅助的SCL(CRC aided SCL,CA-SCL)译码算法的译码时延以及存储空间,提出了分段CRC辅助的MSCL(segmented CRC-aided MSCL,SCA-MSCL)译码算法,并提出了分段信息码字长度修正算法,来保证在信息位索引集A不变的前提下,实现每一分段结尾处对应的信息位索引能够被M整除。SCA-MSCL算法可以借助多个CRC判决来尽可能早地输出译码码字,从而减少译码器的存储空间以及译码时延。 TP393; 针对极化码的连续消除列表(successive cancellation list,SCL)译码算法的高时延问题,提出了基于对数似然比的多比特SCL (multi-bit SCL,MSCL)译码算法,可以在一个判决时刻同时译出多个码字比特,在不损失译码性能的前提下,将译码时延由3N-2个时钟降为4N/M-2个时钟,相比于现有的多比特SCL译码算法,MSCL译码算法具有更低的路径度量值计算复杂度.为了降低循环冗余校验(cyclical redundancy check,CRC)辅助的SCL (CRC aided SCL,CA-SCL)译码算法的译码时延以及存储空间,提出了分段CRC辅助的MSCL (segmented CRC-aided MSCL,SCA-MSCL)译码算法,并提出了分段信息码字长度修正算法,来保证在信息位索引集A不变的前提下,实现每一分段结尾处对应的信息位索引能够被M整除.SCA-MSCL算法可以借助多个CRC判决来尽可能早地输出译码码字,从而减少译码器的存储空间以及译码时延. |
| Author | 沈周青 尚俊娜 |
| AuthorAffiliation | 杭州电子科技大学通信工程学院,浙江杭州,310018 |
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| Author_FL | SHEN Zhouqing SHANG Junna |
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| Keywords | 多比特编码 存储空间 极化码 MSCL 译码时延 分段CRC |
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| Publisher | 中国通信学会 人民邮电出版社有限公司 杭州电子科技大学通信工程学院,浙江杭州,310018 |
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| Title | 极化码的多比特译码算法研究 |
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