The ALOHA Systems in Shadowed Mobile Radio Channels with Slow or Fast Fading

Asrar U.H. Sheikh, Yu Dong Yao, Xiaoping Wu

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

The throughput performance of ALOHA systems in mobile radio channels can be improved due to the capture phenomenon, meaning that the strongest packet may capture the receiver even in the presence of other overlapping packets. In this paper, the influence of receiver capture on the performance of ALOHA in the presence of shadowing is investigated. The combined effect of Rayleigh fading, log-normal shadowing, and spatial distribution of mobile users is also studied. The capture phenomenon results in substantial improvement in system throughput under slow fading. Under fast fading conditions, the throughput can also be increased especially when error-correction coding is used.

Original languageEnglish
Pages (from-to)289-298
Number of pages10
JournalIEEE Transactions on Vehicular Technology
Volume39
Issue number4
DOIs
StatePublished - Nov 1990

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