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

Pingping Shang1, Weicheng Yu2, Kai Zhang3

  • 1Division of Electronic Engineering, IT Convergence Research Center, Chonbuk National University, Jeonju 54896, Korea.

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Summary
This summary is machine-generated.

This study introduces a new spatial modulation (SM) system that enhances security using artificial noise (AN) with imperfect channel state information (CSI). The novel scheme improves secrecy rate performance compared to existing methods at the same data rate.

Keywords:
antenna selectionartificial noise (AN)channel state information (CSI)physical layer security (PLS)secrecy ratespatial modulation (SM)

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Area of Science:

  • Wireless communication security
  • Information theory
  • Signal processing

Background:

  • Spatial Modulation (SM) systems offer efficient data transmission but face security vulnerabilities.
  • Imperfect Channel State Information (CSI) poses challenges for designing robust security schemes.
  • Artificial Noise (AN) is a technique used to degrade eavesdropper's channel estimation.

Purpose of the Study:

  • To propose a novel secrecy-enhancing scheme for spatial modulation (SM) systems.
  • To address the challenge of imperfect channel state information (CSI) in secure wireless communications.
  • To improve the physical layer security of SM systems against passive eavesdropping.

Main Methods:

  • A new scheme activates two antennas simultaneously in an SM system.
  • One antenna transmits information symbols and optimized Artificial Noise (AN) under imperfect CSI.
  • The second antenna transmits a separate AN sequence designed to interfere with eavesdroppers.
  • Secrecy rate is derived to evaluate the proposed scheme's performance.

Main Results:

  • The proposed scheme effectively utilizes imperfect CSI to generate AN.
  • The generated AN can be canceled by the legitimate receiver but not by eavesdroppers.
  • Numerical results demonstrate a superior secrecy rate compared to conventional schemes.
  • The enhanced security is achieved without compromising the effective data rate.

Conclusions:

  • The proposed secrecy-enhancing scheme offers improved security for spatial modulation systems.
  • The scheme is robust to imperfect channel state information.
  • It provides a practical solution for enhancing physical layer security in wireless networks.
  • The method achieves higher secrecy rates at equivalent data rates.