Directional Modulation Via Symbol-Level Precoding: A Way to Enhance Security
作者： Ashkan Kalantari , Mojtaba Soltanalian , Sina Maleki , Symeon Chatzinotas , Bjorn Ottersten
DOI: 10.1109/JSTSP.2016.2600521
关键词:
摘要: 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 channel eavesdropper is known. However, such are shown be restrictive in practice and may require exploitation specialized coding schemes. In this paper, we employ concept directional modulation follow signal processing approach enhance security multiuser multi-input multioutput (MIMO) systems multiantenna present. Security enhancement accomplished by increasing symbol error eavesdropper. Unlike assume that legitimate transmitter not aware its eavesdropper, which more realistic assumption. We examine applicability MIMO receiving algorithms Using knowledge intended symbols users, design enhancing symbol-level precoders different antenna configurations. transform each problem linearly constrained quadratic program propose two solutions, namely iterative algorithm one based on nonnegative least squares, scenario computationally efficient modulation. Simulation results verify analysis show designed outperform benchmark scheme terms both power efficiency enhancement.
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