Performance Analysis for Physical Layer Security in Multi-Antenna Downlink Networks with Limited CSI Feedback

Abstract

Channel state information (CSI) at the transmitter is of importance to the performance of physical layer security based on multi-antenna networks. Specifically, CSI is not only beneficial to improve the capacity of the legitimate channel, but also can be used to degrade the performance of the eavesdropper channel. Thus, the secrecy rate increases accordingly. This letter focuses on the quantitative analysis of the ergodic secrecy sum-rate in terms of feedback amount of the CSI from the legitimate users in multiuser multi-antenna downlink networks. Furthermore, the asymptotic characteristics of the ergodic secrecy sum-rate in two extreme cases is investigated in some detail. Finally, our theoretical claims are confirmed by the numerical results.

4 pages, 2 figures. In IEEE Wireless Communications Letters, 2013

References in corpus (1)

• Secure Transmission with Multiple Antennas II: The MIMOME Wiretap Channel

Cited by in corpus (6)

• Secrecy Wireless Information and Power Transfer: Challenges and Opportunities
• On Interference Alignment with Imperfect CSI: Characterizations of Outage Probability, Ergodic Rate and SER
• On the Secrecy Outage Capacity of Physical Layer Security in Large-Scale MIMO Relaying Systems with Imperfect CSI
• Exploiting Large-Scale MIMO Techniques for Physical Layer Security with Imperfect Channel State Information
• Large-Scale MIMO Relaying Techniques for Physical Layer Security: AF or DF?
• Optimal Power Allocation for Secure Communications in Large-Scale MIMO Relaying Systems