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Enhancing security in wireless multicasting with selective precoding

Enhancing security in wireless multicasting with selective precoding 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 investigate the impact of interferences on it. We also quantify the loss of secrecy multicast capacity due to interferences. Then, we use zero-forcing (ZF) precoding at a relay to enhance the secrecy multicast capacity of each group by eliminating 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 co-existing wireless multicasting can be improved without affecting the performance of each other. Keywords: co-existing radio system; secrecy multicast capacity; selective precoding; zero-forcing precoding. Reference to this paper should be made as follows: Giti, J.E., Chowdhury, S.A.H. Ali, M.M. (2015) `Enhancing security in wireless multicasting with http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Systems, Control and Communications Inderscience Publishers

Enhancing security in wireless multicasting with selective precoding

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Publisher
Inderscience Publishers
Copyright
Copyright © 2015 Inderscience Enterprises Ltd.
ISSN
1755-9340
eISSN
1755-9359
DOI
10.1504/IJSCC.2015.072515
Publisher site
See Article on Publisher Site

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 investigate the impact of interferences on it. We also quantify the loss of secrecy multicast capacity due to interferences. Then, we use zero-forcing (ZF) precoding at a relay to enhance the secrecy multicast capacity of each group by eliminating 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 co-existing wireless multicasting can be improved without affecting the performance of each other. Keywords: co-existing radio system; secrecy multicast capacity; selective precoding; zero-forcing precoding. Reference to this paper should be made as follows: Giti, J.E., Chowdhury, S.A.H. Ali, M.M. (2015) `Enhancing security in wireless multicasting with

Journal

International Journal of Systems, Control and Communications – Inderscience Publishers

Published: Jan 1, 2015

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