Secure wireless multicasting through co-existing MIMO radio systems

J. E. Giti, M. Z I Sarkar, S. A H Chowdhury, M. M. Ali, T. Ratnarajah

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

Abstract

We consider the problem of secure wireless multicasting through multiple-input multiple-output (MIMO) radio system in which two co-existing users communicate with two groups of receivers in the presence of multiple eavesdroppers. At first, we calculate the secrecy multicast capacity of each group and investigate the impact of interferences on it. Then, we use zero-forcing (ZF) precoding at a relay to enhance the secrecy multicast capacity of each group removing the impact of interferences. Finally, we propose a scheme to improve the secrecy multicast capacity of each group making use of interference energy that already exists in the communication medium employing selective precoding at the relay. In the proposed scheme, interference provides an additional source of energy that enhances secrecy multicast capacity at each group without the need to increase the transmitted power. Our results show that exploiting free interference power, the performance of coexisting wireless multicasting can be improved without affecting the performance of each other.

Original languageEnglish
Title of host publication2014 9th International Forum on Strategic Technology, IFOST 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages195-198
Number of pages4
ISBN (Print)9781479960620
DOIs
Publication statusPublished - 1 Jan 2014
Event9th International Forum on Strategic Technology, IFOST 2014 - Cox's Bazar, United Kingdom
Duration: 21 Oct 201423 Oct 2014

Conference

Conference9th International Forum on Strategic Technology, IFOST 2014
Country/TerritoryUnited Kingdom
CityCox's Bazar
Period21/10/1423/10/14

Keywords

  • Co-existing radio system
  • relay precoding
  • secrecy multicast capacity

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