Rate Compatible Block Turbo Codes for Hybrid ARQ Schemes

Sooyoung KIM
Jae Moung KIM
Sung Pal LEE

IEICE TRANSACTIONS on Communications   Vol.E87-B    No.4    pp.999-1001
Publication Date: 2004/04/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories
ARQ,  block codes,  turbo codes,  product codes,  

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Rate compatible (RC) codes are used for adaptive coding schemes or hybrid ARQ schemes in order to adapt varying channel conditions. This can improve overall service quality or the system throughput. Conventional RC codes have usually been designed on the basis of convolutional codes. This letter proposes an efficient RC code based on block codes. We use a high dimensional product code and divide it into the information block and a number of parity blocks. We form RC product codes using various combinations of these blocks. Because we can decode the RC product codes iteratively, these result in block turbo codes and they can be used efficiently for hybrid ARQ schemes.