Design of rate-compatible structured LDPC codes for hybrid ARQ applications

In this paper, families of rate-compatible protograph-based LDPC codes that are suitable for incrementalredundancy hybrid ARQ applications are constructed. A systematic technique to construct low-rate base codes from a higher rate code is presented. The base codes are designed to be robust against e...

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Bibliographic Details
Published in:IEEE journal on selected areas in communications 2009-08, Vol.27 (6), p.965-973
Main Authors: El-Khamy, M., Jilei Hou, Bhushan, N.
Format: Article
Language:English
Subjects:
Algorithms
Automatic repeat request
Channel capacity
Channel coding
channel coding for wireless applications
Channels
Construction
Decoding
Design engineering
Error correction codes
Errors
hybrid automatic repeat request (HARQ)
Low density parity check (LDPC) codes
Negative feedback
Noise levels
Parity check codes
Piercing
progressive puncturing
progressive-edge growth (PEG)
protographs
rate compatible error correcting codes
Redundancy
Robustness
Transmitters
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Summary:In this paper, families of rate-compatible protograph-based LDPC codes that are suitable for incrementalredundancy hybrid ARQ applications are constructed. A systematic technique to construct low-rate base codes from a higher rate code is presented. The base codes are designed to be robust against erasures while having a good performance on error channels. A progressive node puncturing algorithm is devised to construct a family of higher rate codes from the base code. The performance of this puncturing algorithm is compared to other puncturing schemes. Using the techniques in this paper, one can construct a rate-compatible family of codes with rates ranging from 0.1 to 0.9 that are within 1 dB from the channel capacity and have good error floors.
ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2009.090814