On the transmit beamforming for MIMO wiretap channels: Large-system analysis
2014 (English)In: 7th International Conference on Information Theoretic Security, ICITS 2013, Springer Berlin/Heidelberg, 2014, 90-102 p.Conference paper (Refereed)Text
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 Berlin/Heidelberg, 2014. 90-102 p.
Lecture Notes in Computer Science, ISSN 0302-9743 ; 8317 LNCS
Beamforming, Large-system approximation, MIMO wiretap channel, Random matrix theory, Information theory, Matrix algebra, Optimization, Random variables, Wireless telecommunication systems, Deterministic approximation, Fast fading environments, Large-system analysis, Mimo wiretap channels, Precoder optimizations, Wireless communications, Security of data
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-187578DOI: 10.1007/978-3-319-04268-8_6ScopusID: 2-s2.0-84958550978ISBN: 9783319042671OAI: oai:DiVA.org:kth-187578DiVA: diva2:937148
28 November 2013 through 30 November 2013, Singapore
QC 201606152016-06-152016-05-252016-06-15Bibliographically approved