Near-far effect on slotted ALOHA channels with shadowing and capture

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

4 Citations (Scopus)


Signal statistics are modelled in an environment of shadowing and ground wave path loss. This propagation model is used to investigate the channel performance of a slotted Aloha network. The results are presented as receiver capture proability vs. packet propagation distance, with the log-normal variance and the offered traffic as parameters. Log-normal spatial distributions and uniform distributions of users over the coverage area are compared. The former facilitate the analysis of mobile packet-radio channels with near-far effect and shadowing and can often approximate the latter type of distribution. It is shown that stability and throughput cannot be realistically studied by (quasi-) uniform distributions. The log-normal subscriber density with a spatial spread of 8.68 dB gives a viable alternative to the study of the heavily loaded collision-type multiple-access channel.

Original languageEnglish
Title of host publicationIEEE 39th Vehicular Technology Conference
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages5
Publication statusPublished - 1 Dec 1989
Externally publishedYes
Event39th IEEE Vehicular Technology Conference (VTC 1989-Spring) - San Francisco, CA, USA, United States
Duration: 1 May 19893 May 1989


Conference39th IEEE Vehicular Technology Conference (VTC 1989-Spring)
Country/TerritoryUnited States
CitySan Francisco, CA, USA
OtherGateway to New Concepts in Vehicular Technology


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