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Related Experiment Videos

Multi-Layer Encryption for Secure 6G MIMO-AFDM-IM ISAC Systems.

Ruiqi Cao1,2, Yanqun Tang1,2, Caiqin Li1,2

  • 1School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen 518107, China.

Sensors (Basel, Switzerland)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a secure 6G integrated sensing and communication system using multi-layer encrypted MIMO-AFDM with index modulation. The novel scheme enhances sensing accuracy, communication reliability, and energy efficiency while improving physical-layer security.

Keywords:
affine frequency division multiplexingindex modulationintegrated sensing and communicationmultiple-input multiple-outputphysical-layer security

Related Experiment Videos

Area of Science:

  • Wireless Communications
  • Signal Processing
  • Information Security

Background:

  • Mobile 6G (sixth-generation) integrated sensing and communication (ISAC) presents challenges for traditional multicarrier waveforms regarding communication reliability and physical-layer security.
  • Existing systems struggle to balance sensing capabilities with secure communication in dynamic mobile environments.

Purpose of the Study:

  • To propose a novel multi-layer encryption scheme for 6G ISAC systems that enhances both communication performance and physical-layer security.
  • To leverage multiple-input multiple-output (MIMO) affine frequency division multiplexing (AFDM) with index modulation (IM) for a unified sensing and communication framework.

Main Methods:

  • A multi-layer encryption MIMO-AFDM-IM scheme is proposed, utilizing AFDM parameter c2 and subcarrier IM for multi-dimensional security.
  • A unified downlink MIMO configuration is adopted for simultaneous sensing and communication, sharing waveforms, antennas, and the propagation environment.
  • A unified detection framework is developed, balancing complexity and accuracy with synchronized secret keys between base station and user equipment.

Main Results:

  • The proposed scheme achieves enhanced multi-dimensional sensing accuracy, estimating parameters like delay, Doppler, and angle.
  • Demonstrated superior resistance to eavesdropping through the multi-dimensional encryption mechanism.
  • Simulation results show improved communication reliability and energy efficiency (EE) in mobile ISAC scenarios.

Conclusions:

  • The developed MIMO-AFDM-IM scheme effectively addresses the security and performance challenges in mobile 6G ISAC.
  • The unified sensing and communication framework optimizes resource utilization and enhances system capabilities.
  • The proposed approach offers a promising solution for future secure and efficient 6G mobile networks.