Title :
Design of Rate-Compatible Irregular LDPC Codes for Incremental Redundancy Hybrid ARQ Systems
Author :
Kim, Jaehong ; Hur, Woonhaing ; Ramamoorthy, Aditya ; McLaughlin, Steven W.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA
Abstract :
We present a new class of irregular low-density parity-check (LDPC) codes for finite block length (up to a few thousand symbols). The proposed codes are efficiently encodable and have a simple rate-compatible puncturing structure which is suitable for incremental redundancy hybrid automatic repeat request (IR-HARQ) systems. The codes outperform optimized irregular LDPC codes and (extended) irregular repeat-accumulate codes for rates 0.67-0.94, and are particularly good at high puncturing rates where good puncturing performance has been previously difficult to achieve. These characteristics result in good throughput performance over time-varying channels in IR-HARQ systems
Keywords :
automatic repeat request; parity check codes; time-varying channels; finite block length; incremental redundancy hybrid ARQ systems; incremental redundancy hybrid automatic repeat request; irregular repeat-accumulate codes; low-density parity-check codes; rate-compatible irregular LDPC codes; time-varying channels; Algorithm design and analysis; Automatic repeat request; Cyclic redundancy check; Decoding; Design engineering; Forward error correction; Parity check codes; Throughput; Time-varying channels; Transmitters;
Conference_Titel :
Information Theory, 2006 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
1-4244-0505-X
Electronic_ISBN :
1-4244-0504-1
DOI :
10.1109/ISIT.2006.261962
