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Title:
RATE MATCHING IN POLAR CODES
Document Type and Number:
WIPO Patent Application WO/2019/030908
Kind Code:
A1
Abstract:
A communication apparatus includes: an encoder that encodes an input vector to output a codeword of polar code; a memory that stores a reliability-ordered sequence of indices of the input vector and a set of indices for rate-matching; a controller that is configured to: select a frozen set of indices based on at least one of a universal rate-matching scheme and the reliability-ordered sequence stored in the memory such that the reliability-ordered sequence is generated without considering the rate-matching scheme; construct the input vector by setting the frozen set to a frozen bit and a non-frozen set to information bits; and skip codebits of the codeword outputted by the encoder from transmission, the codebits corresponding respectively to the set of indices for rate-matching.

Inventors:
CHAKI PRAKASH (JP)
KAMIYA NORIFUMI (JP)
Application Number:
PCT/JP2017/029167
Publication Date:
February 14, 2019
Filing Date:
August 10, 2017
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
H03M13/00; H03M13/13
Domestic Patent References:
WO2017127973A12017-08-03
Other References:
VALERIO BIOGLIO ET AL: "Low-Complexity Puncturing and Shortening of Polar Codes", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 23 January 2017 (2017-01-23), XP080750896
NEC CORPORATION: "Sequence design evaluation for rate-matched polar codes", vol. RAN WG1, no. Qingdao; 20170627 - 20170630, 20 June 2017 (2017-06-20), XP051305759, Retrieved from the Internet [retrieved on 20170620]
QUALCOMM INCORPORATED: "Rate-matching scheme for polar codes and performance evaluation", vol. RAN WG1, no. Hangzhou; 20170515 - 20170519, 14 May 2017 (2017-05-14), XP051273834, Retrieved from the Internet [retrieved on 20170514]
E. ARIKAN: "Channel polarization: A method for constructing capacity-achieving codes for symmetric binary-input memoryless channels", IEEE TRANSACTIONS OF INFORMATION THEORY, vol. 55, July 2009 (2009-07-01), pages 3051 - 3073, XP011262510
I. TAL; A. VARDY: "List decoding of polar codes", IEEE TRANSACTIONS OF INFORMATION THEORY, vol. 61, no. 5, May 2015 (2015-05-01), pages 2213 - 2226, XP011578805, DOI: doi:10.1109/TIT.2015.2410251
P. TRIFONOV: "Efficient design and decoding of polar codes", IEEE TRANSACTIONS ON COMMUNICATIONS, vol. 60, no. 11, November 2012 (2012-11-01), XP011473857, DOI: doi:10.1109/TCOMM.2012.081512.110872
Attorney, Agent or Firm:
KATSURAGI Yuji (JP)
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