NDLI: A hybrid ARQ scheme for DS-CDMA mobile data communications

Content Provider	IEEE Xplore Digital Library
Author	Zhao, H. Uebayashi, S.
Copyright Year	1996
Description	Author affiliation: NTT Mobile Commun. Network Inc., Kanagawa, Japan (Zhao, H.)
Abstract	This paper proposes a selective repeat hybrid-ARQ scheme for mobile data communications. An simplified Chase decoding and Viterbi decoding with code combining and diversity combining are concatenated as forward error correction (FEC). The Chase (1972) decoding algorithm is simplified in such a way that the algorithm searches for error bits according to their reliability information, and the try order for correct errors is controlled in order to reduce the number of calculations. The frames used for code combining and diversity combining are selected according to the reliability of the received frames. The extremely bad frames are discarded and only the good frames are combined for decoding, thus enhancing the decoding ability. The simplified Chase decoding increases the throughput in higher Eb/N0 ranges and the Viterbi decoding with code combining and diversity combining improves the throughput in the lower Eb/N0 ranges. Computer simulation results show that the proposed scheme used in a wideband coherent DS-CDMA system improves the throughput within a very wide Eb/N0 ranges.
Starting Page	71
Ending Page	75
File Size	533413
Page Count	5
File Format	PDF
ISBN	0780333004
DOI	10.1109/ICUPC.1996.557755
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-10-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Automatic repeat request Multiaccess communication Data communication Diversity reception Decoding Throughput Viterbi algorithm Forward error correction Error correction Concatenated codes
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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