On the transmit beamforming for MIMO wiretap channels: Large-system analysis
2013 (English)In: Information Theoretic Security: 7th International Conference, ICITS 2013, Singapore, November 28-30, 2013, Proceedings, Springer Publishing Company, 2013, 90-102 p.Conference paper (Refereed)
With the growth of wireless networks, security has become a fundamental issue in wireless communications due to the broadcast nature of these networks. In this work, we consider MIMO wiretap channels in a fast fading environment, for which the overall performance is characterized by the ergodic MIMO secrecy rate. Unfortunately, the direct solution to finding ergodic secrecy rates is prohibitive due to the expectations in the rates expressions in this setting. To overcome this difficulty, we invoke the large-system assumption, which allows a deterministic approximation to the ergodic mutual information. Leveraging results from random matrix theory, we are able to characterize the achievable ergodic secrecy rates. Based on this characterization, we address the problem of covariance optimization at the transmitter. Our numerical results demonstrate a good match between the large-system approximation and the actual simulated secrecy rates, as well as some interesting features of the precoder optimization.
Place, publisher, year, edition, pages
Springer Publishing Company, 2013. 90-102 p.
, Lecture Notes in Computer Science, ISSN 0302-9743 ; 8317
MIMO wiretap channel, Large-system approximation, Random matrix theory, Beamforming
IdentifiersURN: urn:nbn:se:kth:diva-145707DOI: 10.1007/978-3-319-04268-8-6ISI: 000341118800006ScopusID: 2-s2.0-84894144287ISBN: 978-3-319-04268-8OAI: oai:DiVA.org:kth-145707DiVA: diva2:719870
7th International Conference on Information Theoretic Security, ICITS 2013; Singapore; Singapore; 28 November 2013 through 30 November 2013
FunderSwedish Research Council
QC 201406132014-05-272014-05-272014-10-07Bibliographically approved