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Performance Analysis of MIMO Based WLAN Security Using Artificial Noise

K. Ilanchezhian, Dr. R. Gunasundari


Security is one of the major issues in wireless communication system. In a wireless communication system as the transmission of information signal is over the air, eavesdroppers may have easy access to the transmitted data. The conventional network security mainly depends on cryptographic schemes. But as the security level increases, computational complexity will be high and cause complex key management problems. In this paper, the problem of secret communication between two nodes in the presence of a passive eavesdropper is considered. In general, nodes with multiple transmit antenna elements can ensure secure communication using directional antenna. In this paper, MIMO channel with multiple transmit antenna elements utilize fraction of the available power to produce „artificial noise‟ for the improvement of secure communication. The artificial noise is generated by the transmitter in such away that it degrades only the eavesdropper‟s channel. The various performance metrics such as bit error rate, channel capacity, optimal power allocation and secrecy rate were analyzed in the presence of non-colluding and colluding eavesdroppers. The obtained simulation results are compared with the existing work that does not use artificial noise. It is inferred from the results that the proposed work achieves improved secrecy rate than the existing work.


Eavesdropper, Channel Capacity, MIMO, WLAN.

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K. Ilanchezhian, R.Gunasundari, „Improved MIMO based WLAN security using artificial noise‟, in Proc. AICTE National Conference on Green ICT, GICT-08, pp. 29-33, July 2013.

Andreas F. Molisch and Moe Z.Win, “ MIMO systems with antenna selection,” IEEE microwave magazine, March 2004.

Pengfei Xia, Huaning Niu, Jisung Oh, Chiu Ngo,” Diversity Analysis of Transmit Beamforming and Its Application in IEEE 802.11n Systems”, IEEE Transactions on vehicular technology, vol.57, no.4, pp. 2638 – 2642 July 2008

Xiangyun Zhou, Radha Krishna Ganti and Jeffrey G.Andrews, “Secure wireless network connectivity with multi - antenna transmission,” IEEE Transaction onWireless Commn, vol.10, no.2, pp.425-430, Feb. 2011.

Zhu Han, Ninoslav Marina, Merouane Debbah and Are Hjorungnes, “Physical Layer Security Game: Interaction between Source, Eavesdropper and Friendly Jammer”, Eurasip Journal on Wireless Communications and Networking, hal-00446934, version 1 – 13, Jan. 2010.

Hong Wen and Guang Gong, “A cross-layer approach to enhance the security of wireless networks based on MIMO, ” Information sciences and systems, CISS 2009, pp. 935-939, March 2009.

Satashu Goel and Rohit Negi, “Guaranting secrecy using artificial noise,” IEEE Transaction on Wireless Commn., vol.7, no.9, pp.2180-2189, June 2008.

A.Khisti and G.W. Wornell, “Secure transmission with multiple antennas: the MISOME Channel,” IEEE Trans. Inf. Theory, vol.56, no.7, pp. 3088-3104, Jul.2010.

Shabnam Shafiee, Nan Liu, Sennur Ulukus, “Towards the Secrecy Capacity of the Gaussian MIMO wire-tap channel: The 2-2-1 Channel,” IEEE Transactions on Information theory, vol.55, no.9, pp. 4033-4039, Sept. 2009.

A.Khisti and G.W. Wornell, “Secure transmission with multiple antennas: the MIMOME Channel,” IEEE Trans. Inf. Theory,” vol.56, vol. 56, no.11, pp. 5515-5532, Nov.2010.

Joao P. Vilela, Matthieu Bloch, Joao Barros, Steven W. McLaughlin, “Wireless Secrecy Regions With Friendly Jamming,” IEEE Transactions on information forensics and security, vol.6, no.2, pp. 256-266, June 2011.

Lun Dong, Zhu Han, Athina P. Petropulu and H. Vincent Poor, “Improving wireless physical layer security via cooperating relays,” IEEE Transactions on signal processing, vol.58, no.3, pp. 1875-1888, March 2010.


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