A Type I hybrid ARQ system with adaptive code rates

Author

Lin, Michacl L. ; Deng, Robert H.

Author_Institution

Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore

Volume

2

fYear

1993

fDate

6-11 Sep 1993

Firstpage

649

Abstract

Type I hybrid ARQ systems use an error-control code of fixed rate for error-correction in each transmitted packet. In such systems, the code rate must be carefully chosen to match the channel bit error rate (BER) in order to maximize system throughput. Whenever there is a mismatch between code rate and channel BER, the throughput suffers. This paper proposes a type I hybrid ARQ system which automatically adjusts its code rates to match channel BERs. The proposed system is very simple to implement and yet performs significantly better than type I hybrid ARQ systems of fixed code rate

Keywords

adaptive codes; automatic repeat request; error correction codes; error statistics; variable rate codes; adaptive code rates; channel bit error rate; error-control code; system throughput; type I hybrid ARQ systems; Adaptive coding; Automatic repeat request; Bit error rate; Convolutional codes; Decoding; Hamming distance; Hybrid integrated circuits; Protocols; Throughput; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Networks, 1993. International Conference on Information Engineering '93. 'Communications and Networks for the Year 2000', Proceedings of IEEE Singapore International Conference on

Print_ISBN

0-7803-1445-X

Type

conf

DOI

10.1109/SICON.1993.515668

Filename

515668