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Integrated Sensing and Secure Communication with XL-MIMO.

Ping Sun1, Haibo Dai2, Baoyun Wang1

  • 1School of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.

Sensors (Basel, Switzerland)
|January 11, 2024
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Summary
This summary is machine-generated.

Extremely large-scale MIMO systems enhance integrated sensing and secure communication. Beam focusing maximizes secrecy rates for users, even with interfering radar targets in the near-field region.

Keywords:
beam focusingintegrated sensing and communicationnear fieldvehicular ad hoc networks (VANETs)

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Area of Science:

  • Electrical Engineering
  • Wireless Communications
  • Signal Processing

Background:

  • Integrated sensing and communication (ISAC) systems face challenges in near-field environments.
  • Extremely large-scale multiple-input multiple-output (XL-MIMO) offers potential for enhanced performance.
  • Ensuring communication security in the presence of sensing entities is critical.

Purpose of the Study:

  • To investigate near-field beam-focusing design in XL-MIMO empowered ISAC systems.
  • To maximize the achievable secrecy rate for the communication user.
  • To meet transmit beampattern gain requirements for radar targets.

Main Methods:

  • Semidefinite relaxation (SDR)-based two-stage procedure for global optimization.
  • Development of a sub-optimal solution for reduced computational complexity.
  • Analysis of system performance in the near-field region.

Main Results:

  • Beam focusing design enables positive secrecy rates.
  • Effective management of interference from radar targets.
  • Feasible secure communication even with co-located targets and users.

Conclusions:

  • Near-field beam focusing is a viable strategy for secure ISAC in XL-MIMO systems.
  • The proposed optimization approach achieves optimal and sub-optimal solutions.
  • The study demonstrates the potential of XL-MIMO for enhanced security and sensing capabilities.