Interference Channels with Confidential Messages: Leveraging OFDM Transmission to Scale up Secure Degrees of Freedom with No CSIT

Jean De Dieu Mutangana, Ravi Tandon

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

1 Scopus citations

Abstract

We consider the problem of K-user interference channel with confidential messages (IC-CM) with intersymbol interference (ISI). The main contribution of this paper is to show that sum-secure degrees of freedom (SDoF) can be made to linearly increase with the number of users K in the absence of channel state information at the transmitters (CSIT). The proposed scheme entails three main ingredients : a) leveraging the simple channel matrix structures resulting from the orthogonal frequency division multiplexing (OFDM) type transmission technique in order to eliminate interference and allow coherent decoding of each message at its respectively intended receiver. b) exploiting the inherent heterogeneity in channel impulse response (CIR) lengths between the transmitters and the receivers (which results from the wireless multipath propagation), and c) injection of artificial noise into the transmitted signal from a strategically chosen small number of transmitters J that act as cooperative jammers in order to preserve full confidentiality of the messages at the unintended receivers. This is the first work showing that the SDoF of the K-user IC-CM with ISI can linearly increase with the number of users without CSIT.

Original languageEnglish (US)
Title of host publication2019 IEEE International Symposium on Information Theory, ISIT 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages747-751
Number of pages5
ISBN (Electronic)9781538692912
DOIs
StatePublished - Jul 2019
Event2019 IEEE International Symposium on Information Theory, ISIT 2019 - Paris, France
Duration: Jul 7 2019Jul 12 2019

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
Volume2019-July
ISSN (Print)2157-8095

Conference

Conference2019 IEEE International Symposium on Information Theory, ISIT 2019
Country/TerritoryFrance
CityParis
Period7/7/197/12/19

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Modeling and Simulation
  • Applied Mathematics

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