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