標題: | Re-Polarization Processing in Extended Polar Codes |
作者: | Huang, Yu-Ming Chang, Hsie-Chia Li, Hsiang-Pang 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics |
關鍵字: | polar codes;length-compatible;rate-compatible;length-adaptation;extending |
公開日期: | 1-十月-2017 |
摘要: | In this paper, extended polar codes based on re-polarization technique are proposed. The presented schemes extend a conventional polar code of length N to length N + q, which stand in contrast to known length-compatible schemes such as puncturing and shortening techniques that reduce the length from N to N q. For certain specific lengths, the waterfall region performance of our extended polar code is superior to that of other length-compatible polar codes. It provides better reliability and reduces the management overhead in several storage devices and communications systems. In essence, extended polar codes are created by re-polarizing the q least reliable nonfrozen bit-channels with the help of q additional frozen bit-channels. It is proved that this re-polarization enhances the reliability of these bits. Moreover, the extended schemes can be not only modified to improve decoding performance, but generalized as a m-stage scheme to improve throughput significantly. With parallel operation, the throughput is improved around 2(m-1) times when q is small. Compared to a shortened polar code with length 1536, the encoding and decoding complexities of an extended polar code are only 50% and 60.5%, respectively. |
URI: | http://dx.doi.org/10.1587/transcom.2016EBP3307 http://hdl.handle.net/11536/144425 |
ISSN: | 0916-8516 |
DOI: | 10.1587/transcom.2016EBP3307 |
期刊: | IEICE TRANSACTIONS ON COMMUNICATIONS |
Volume: | E100B |
起始頁: | 1765 |
結束頁: | 1777 |
顯示於類別: | 期刊論文 |