Secure Massive MIMO transmission in the presence of an active eavesdropper

Wu Y, Schober R, Wing Kwan Ng D, Xiao C, Caire G (2015)

Publication Language: English

Publication Type: Conference contribution

Publication year: 2015

Event location: London GB

ISBN: 978-1-4673-6432-4

DOI: 10.1109/ICC.2015.7248525

Abstract

In this paper, we investigate secure and reliable transmission strategies for multi-cell multi-user massive multipleinput multiple-output (MIMO) systems in the presence of an active eavesdropper. We consider a time-division duplex system where uplink training is required and an active eavesdropper can attack the training phase to cause pilot contamination at the transmitter. This forces the precoder used in the subsequent downlink transmission phase to implicitly beamform towards the eavesdropper, thus increasing its received signal power. We derive an asymptotic achievable secrecy rate for matched filter precoding and artificial noise (AN) generation at the transmitter when the number of transmit antennas goes to infinity. For the achievability scheme at hand, we obtain the optimal power allocation policy for the transmit signal and the AN in closed form. For the case of correlated fading channels, we show that the impact of the active eavesdropper can be completely removed if the transmit correlation matrices of the users and the eavesdropper are orthogonal. Inspired by this result, we propose a precoder null space design exploiting the low rank property of the transmit correlation matrices of massive MIMO channels, which can significantly degrade the eavesdropping capabilities of the active eavesdropper.

Authors with CRIS profile

Yongpeng Wu Lehrstuhl für Digitale Übertragung Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

Institut Eurécom (EURECOM) FR France (FR) University of New South Wales (UNSW) AU Australia (AU) Missouri University of Science and Technology US United States (USA) (US)

How to cite

APA:

Wu, Y., Schober, R., Wing Kwan Ng, D., Xiao, C., & Caire, G. (2015). Secure Massive MIMO transmission in the presence of an active eavesdropper. In IEEE (Eds.), Proceedings of the 2015 IEEE International Conference on Communications (ICC). London, GB.

MLA:

Wu, Yongpeng, et al. "Secure Massive MIMO transmission in the presence of an active eavesdropper." Proceedings of the 2015 IEEE International Conference on Communications (ICC), London Ed. IEEE, 2015.

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