Physical Layer Security in Downlink Multi-Antenna Cellular Networks
arXiv:1307.7211 · doi:10.1109/TCOMM.2014.2314664
Abstract
In this paper, we study physical layer security for the downlink of cellular networks, where the confidential messages transmitted to each mobile user can be eavesdropped by both (i) the other users in the same cell and (ii) the users in the other cells. The locations of base stations and mobile users are modeled as two independent two-dimensional Poisson point processes. Using the proposed model, we analyze the secrecy rates achievable by regularized channel inversion (RCI) precoding by performing a large-system analysis that combines tools from stochastic geometry and random matrix theory. We obtain approximations for the probability of secrecy outage and the mean secrecy rate, and characterize regimes where RCI precoding achieves a nonzero secrecy rate. We find that unlike isolated cells, the secrecy rate in a cellular network does not grow monotonically with the transmit power, and the network tends to be in secrecy outage if the transmit power grows unbounded. Furthermore, we show that there is an optimal value for the base station deployment density that maximizes the secrecy rate, and this value is a decreasing function of the signal-to-noise ratio.
submitted to IEEE Transactions on Communications, July 2013
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- Towards a Realistic Assessment of Multiple Antenna HCNs: Residual Additive Transceiver Hardware Impairments and Channel Aging
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- Physical Layer Security Enhancement With Reconfigurable Intelligent Surface-Aided Networks
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- Artificial-Noise-Aided Transmission in Multi-Antenna Relay Wiretap Channels with Spatially Random Eavesdroppers
- Physical Layer Security in Three-Tier Wireless Sensor Networks: A Stochastic Geometry Approach
- Physical Layer Security in Heterogeneous Networks with Jammer Selection and Full-Duplex Users
- Artificial-Noise Aided Secure Transmission in Large Scale Spectrum Sharing Networks
- Physical Layer Security in Millimeter Wave Cellular Networks
- Stochastic Geometry-based Comparison of Secrecy Enhancement Techniques in D2D Networks
- Physical Layer Security in Heterogeneous Cellular Networks