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A Random Subcarrier-Selection Method Based on Index Modulation for Secure Transmission.

Tao Zhan1, Jiangong Chen1, Shan Luan2

  • 1National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China (UESTC), Chengdu 611731, China.

Sensors (Basel, Switzerland)
|April 12, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a low-complexity random subcarrier-selection method based on index modulation (RSCS-IM) for secure wireless communication using frequency diverse arrays (FDA) and orthogonal frequency division multiplexing (OFDM). It enhances security by overcoming coupling effects without complex encryption.

Keywords:
FDAOFDMindex modulationrandom subcarrier-selectionsecure communication

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Area of Science:

  • Wireless Communication
  • Signal Processing
  • Information Theory

Background:

  • Frequency Diverse Array (FDA) and Orthogonal Frequency Division Multiplexing (OFDM) are used for secure wireless communication.
  • Linear frequency increment assignment in FD-OFDM systems causes insecure coupling effects.
  • Existing random subcarrier-selection methods face challenges in implementation.

Purpose of the Study:

  • To propose a low-complexity random subcarrier-selection method based on index modulation (RSCS-IM).
  • To enhance the security of FD-OFDM systems by mitigating coupling effects.
  • To analyze the spectral efficiency and computational complexity of the proposed RSCS-IM method.

Main Methods:

  • Leveraging the randomness of Index Modulation (IM) to develop RSCS-IM.
  • Analyzing the spectral efficiency (SE) of the proposed system.
  • Deriving a closed-form expression for the Bit Error Rate (BER) performance.
  • Validating theoretical results through simulations.

Main Results:

  • The proposed RSCS-IM method offers a low-complexity solution for random subcarrier selection.
  • The system achieves enhanced security in wireless communication by addressing coupling effects.
  • Theoretical analysis provides a closed-form expression for BER performance.
  • Simulations confirm the validity of the theoretical outcomes.

Conclusions:

  • RSCS-IM effectively enhances wireless communication security without mathematical encryption.
  • The method provides a practical approach to random subcarrier selection in FD-OFDM systems.
  • The analysis confirms the system's spectral efficiency and manageable computational complexity.