A robust rate-adaptive hybrid ARQ scheme and frequency hopping for multiple-access communication systems

TitleA robust rate-adaptive hybrid ARQ scheme and frequency hopping for multiple-access communication systems
Publication TypeConference Paper
Year of Publication1992
AuthorsBigloo, A. M. Y., Q. Wang, and V. K. Bhargava
Conference NameGlobal Telecommunications Conference, 1992. Conference Record., GLOBECOM '92. Communication for Global Users., IEEE
Pagination889 -893 vol.2
Date Publisheddec.
KeywordsARQ, channel symbol, decoder, encoding, FH-SSMA, fixed-rate coding, frequency agility, frequency hopping, frequency shift keying, interference, multi-access systems, multiple-access communication systems, N-ary frequency-shift keying, N-ary FSK, rate-adaptive coding, Reed-Solomon codes, side information, spread spectrum communication, spread-spectrum multiple-access, system capacity, throughput, time delay, variable-rate Reed-Solomon code
Abstract

A frequency-hopped spread-spectrum multiple-access (FH-SSMA) communication system with a rate-adaptive coding scheme is considered. The scheme uses a variable-rate Reed-Solomon code, with a single decoder. Two cases are considered: N-ary frequency-shift keying (FSK) without erasure and N-ary FSK with perfect side information as to whether a channel symbol is hit or not. It is shown that FH-SSMA with this rate-adaptive coding scheme can serve a higher number of users than with fixed-rate coding for the above mentioned cases. This increase in the number of users is due to the higher throughput which results in less interference for the other users. It is shown that perfect side information increases the capacity of the system. The number of users can further increase if more time delay is allowed in the system

URLhttp://dx.doi.org/10.1109/GLOCOM.1992.276394
DOI10.1109/GLOCOM.1992.276394

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