Title:
LOW COMPLEXITY HYBRID ARQ SCHEME BASED ON RATE COMPATIBLE ZIGZAG CODES
Document Type and Number:
WIPO Patent Application WO2006092681
Kind Code:
A3
Abstract:
A channel coding method, apparatus and computer program product that provides efficient hybrid automatic repeat request (HARQ) comprising low complexity rate compatible zigzag codes, and by further applying data reshaping in combination with rate matching rules to substantially avoid sub-optimality due to puncturing, in combination with irregular parallel concatenation of zigzag (PCZZ) codes. Presently preferred rate matching rules comprise: (1) maintaining a PCZZ parameter ?J as small as possible; and (2) creating a code having the shortest rows; where a code with J=1 gives the lowest coding rate (mother code) with PCZZ parameters (K, 1, 3). Data reshaping shapes K information bits into a plurality of arrays by associating a parity bit with each row of an array. Each array of the plurality has a different number of rows as compared to each other array in order to match rates. Row length within an array nay be allowed to vary ?J within constraints in order to exactly match a data rate.
Inventors:
NEFEDOV NIKOLAI (FI)
Application Number:
PCT/IB2006/000244
Publication Date:
October 19, 2006
Filing Date:
February 08, 2006
Export Citation:
Assignee:
NOKIA CORP (FI)
NOKIA INC (US)
NEFEDOV NIKOLAI (FI)
NOKIA INC (US)
NEFEDOV NIKOLAI (FI)
International Classes:
H03M13/29
Foreign References:
| US20040123215A1 | 2004-06-24 |
Other References:
CHAN K.S. ET AL.: "Adaptive type III hybrid ARQ scheme using zigzag code", ELECTRONICS LETTERS, IEE, vol. 35, no. 24, 25 November 1999 (1999-11-25), STEVENAGE, GB, pages 2102 - 2104
NEFEDOV N.: "Evaluation of low complexity concatenated codes for high data rate transmission", PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, 2003. PIMRC 2003. 14TH IEEE PROCEEDINGS, 7 September 2003 (2003-09-07) - 10 September 2003 (2003-09-10), PISCATAWAY, NJ, USA, pages 1868 - 1872, XP010678782, DOI: doi:10.1109/PIMRC.2003.1260440
NEFEDOV N.: "Evaluation of low complexity concatenated codes for high data rate transmission", PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, 2003. PIMRC 2003. 14TH IEEE PROCEEDINGS, 7 September 2003 (2003-09-07) - 10 September 2003 (2003-09-10), PISCATAWAY, NJ, USA, pages 1868 - 1872, XP010678782, DOI: doi:10.1109/PIMRC.2003.1260440
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