Large system analysis of the secrecy sum-rates with regularized channel inversion precoding

Giovanni Geraci*, Jinhong Yuan, Iain B. Collings

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

11 Citations (Scopus)

Abstract

In this paper, we study the performance of the Regularized Channel Inversion (RCI) precoder in a multi-user MIMO system with malicious users. We consider the general case when the number of users per transmit antenna β can take any value. We derive the optimal regularization parameter that maximizes the achievable secrecy sum-rate via large-system analysis, which we show to be accurate via simulations. We find that the secrecy requirements limit the number of users per transmit antenna that can be served with non-zero sum-rate. We show that for large signal-to-noise ratio, RCI can achieve secrecy without reducing the sum-rate if β < 1. If β = 1, this is still possible at a cost of less than 4dB in terms of transmitted power. If β > 1, then the secrecy requirements result in a poor sum-rate.

Original languageEnglish
Title of host publication2012 IEEE Wireless Communications and Networking Conference (WCNC)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages533-537
Number of pages5
ISBN (Electronic)9781467304375
ISBN (Print)9781467304368
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 IEEE Wireless Communications and Networking Conference, WCNC 2012 - Paris, France
Duration: 1 Apr 20124 Apr 2012

Other

Other2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
CountryFrance
CityParis
Period1/04/124/04/12

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Geraci, G., Yuan, J., & Collings, I. B. (2012). Large system analysis of the secrecy sum-rates with regularized channel inversion precoding. In 2012 IEEE Wireless Communications and Networking Conference (WCNC) (pp. 533-537). [6214425] Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/WCNC.2012.6214425