Reference : Directional Modulation via Symbol-Level Precoding: A Way to Enhance Security
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
Security, Reliability and Trust
http://hdl.handle.net/10993/28291
Directional Modulation via Symbol-Level Precoding: A Way to Enhance Security
English
Kalantari, Ashkan mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Soltanalian, Mojtaba mailto [University of Illinois at Chicago, Chicago > Department of Electrical and Computer Engineering]
Maleki, Sina mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Chatzinotas, Symeon mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Aug-2016
IEEE Journal of Selected Topics in Signal Processing
Institute of Electrical and Electronics Engineers (IEEE)
Yes (verified by ORBilu)
1932-4553
1941-0484
New York
NY
[en] Array processing ; directional modulation ; M-PSK modulation ; physical layer security ; symbol-level precoding
[en] Wireless communication provides a wide coverage at the cost of exposing information to unintended users. As an information-theoretic paradigm, secrecy rate derives bounds for secure transmission when the channel to the eavesdropper is known. However, such bounds are shown to be restrictive in practice and may require exploitation of specialized coding schemes. In this paper, we employ the concept of directional modulation and follow a signal processing approach to enhance the security of multi-user MIMO communication systems when a multi-antenna eavesdropper is present. Enhancing the security is accomplished by increasing the symbol error rate at the eavesdropper. Unlike the information-theoretic secrecy rate paradigm, we assume that the legitimate transmitter is not aware of its channel to the eavesdropper, which is a more realistic assumption. We examine the applicability of MIMO receiving algorithms at the eavesdropper. Using the channel knowledge and the intended symbols for the users, we design security enhancing symbol-level precoders for different transmitter and eavesdropper antenna configurations. We transform each design problem to a linearly constrained quadratic program and propose two solutions, namely the iterative algorithm and one based on non-negative least squares, at each scenario for a computationally-efficient modulation. Simulation results verify the analysis and show that the designed precoders outperform the benchmark scheme in terms of both power efficiency and security enhancement.
Interdisciplinary Centre for Security, Reliability and Trust
Fonds National de la Recherche - FnR
Researchers ; Professionals
http://hdl.handle.net/10993/28291

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