Scalable Sporadic Medium Access for Complex Propagation Environments

Chirag R. Rao, Fikadu T. Dagefu, Gunjan Verma, Predrag Spasojevic, Brian M. Sadler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Supporting networks with a large number of nodes in infrastructure-poor and complex propagation environments is an important challenge for military and civilian applications. A major problem when using classical approaches, such as code division multiple access (CDMA), is maintaining inter-link coordination while mitigating multi-user interference (MUI). By contrast, loosely synchronous (LS) codes have perfect code orthogonality within a window of inter-link delays at a cost of the number of available spreading codes. Since sporadic communications naturally involves a low probability of transmission, we investigate the potential for LS code reuse to effectively support more users. We study this problem by simulating inter-user channels using a high-fidelity physics-based model. We focus our study of the channel on the low-VHF band, which has improved penetration and channel coherence in complex environments. We perform initial characterization of different levels of code reuse, synchronization and coordination. Of particular interest is a purely random (uncoordinated) spreading code assignment. The results illustrate good performance of a scalable medium access scheme.

Original languageEnglish (US)
Title of host publication2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538660096
DOIs
StatePublished - Dec 18 2018
Event29th IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2018 - Bologna, Italy
Duration: Sep 9 2018Sep 12 2018

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Volume2018-September

Other

Other29th IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2018
CountryItaly
CityBologna
Period9/9/189/12/18

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Rao, C. R., Dagefu, F. T., Verma, G., Spasojevic, P., & Sadler, B. M. (2018). Scalable Sporadic Medium Access for Complex Propagation Environments. In 2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2018 [8580815] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC; Vol. 2018-September). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PIMRC.2018.8580815