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Open AccessArticle

Secrecy Enhancing Scheme for Spatial Modulation Using Antenna Selection and Artificial Noise

1
Division of Electronic Engineering, IT Convergence Research Center, Chonbuk National University, Jeonju 54896, Korea
2
Shanghai Aerospace Electronic Technology Institute, Shanghai 201109, China
3
Department of Communication Engineering, Donghua University, Shanghai 201620, China
*
Author to whom correspondence should be addressed.
Current address: 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do 54896, Korea.
Entropy 2019, 21(7), 626; https://doi.org/10.3390/e21070626
Received: 31 May 2019 / Accepted: 23 June 2019 / Published: 26 June 2019
(This article belongs to the Special Issue Information-Theoretic Security II)
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Abstract

In this paper, we present a new secrecy-enhancing scheme for the spatial modulation (SM) system, by considering imperfect channel state information (CSI). In the proposed scheme, two antennas are activated at the same time. One of the activated antennas transmits information symbols along with artificial noise (AN) optimized under the imperfect CSI condition. On the other hand, the other activated antenna transmits another AN sequence. Because the AN are generated by exploiting the imperfect CSI of the legitimate channel, they can only be canceled at the legitimate receiver, while the passive eavesdropper will suffer from interference. We derive the secrecy rate of the proposed scheme in order to estimate the performance. The numerical results demonstrated in this paper verify that the proposed scheme can achieve a better secrecy rate compared to the conventional scheme at the same effective data rate. View Full-Text
Keywords: spatial modulation (SM); antenna selection; artificial noise (AN); channel state information (CSI); physical layer security (PLS); secrecy rate spatial modulation (SM); antenna selection; artificial noise (AN); channel state information (CSI); physical layer security (PLS); secrecy rate
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MDPI and ACS Style

Shang, P.; Yu, W.; Zhang, K.; Jiang, X.-Q.; Kim, S. Secrecy Enhancing Scheme for Spatial Modulation Using Antenna Selection and Artificial Noise. Entropy 2019, 21, 626.

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