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Alternating Direction Method of Multipliers-Based Constant Modulus Waveform Design for Dual-Function

Ahmed Saleem1, Abdul Basit1, Muhammad Fahad Munir1

  • 1Department of Electrical & Computer Engineering, Faculty of Engineering & Technology, International Islamic University, Islamabad 44100, Pakistan.

Entropy (Basel, Switzerland)
|July 29, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces constant modulus waveforms for dual-function radar-communication (DFRC) systems using MIMO. The new waveforms improve radar detection and communication bit error rates while minimizing interference.

Keywords:
ADMMMIMO communicationdual-function radar communicationwaveform design

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Wireless Communications

Background:

  • Dual-function radar-communication (DFRC) systems integrate sensing and communication functionalities.
  • Multi-input multi-output (MIMO) configurations enhance spatial resolution and link reliability.
  • Constant modulus waveforms are crucial for power efficiency and hardware simplicity in DFRC.

Purpose of the Study:

  • To design constant modulus waveforms for MIMO-based DFRC systems in far-field scenarios.
  • To minimize interference power while adhering to constant modulus constraints.
  • To achieve desired beampatterns for both radar and communication functions.

Main Methods:

  • Formulation of a non-convex optimization problem for waveform synthesis.
  • Iterative solution using the alternating direction method of multipliers (ADMM) algorithm.
  • Approximation of target beampatterns with high-gain radar and communication beams and low sidelobes.

Main Results:

  • Designed waveforms achieve a high-gain radar beam and a slightly high-gain communication beam.
  • Waveforms maintain a low sidelobe level, crucial for interference mitigation.
  • Improved detection probability for radar and reduced bit error rate (BER) for communication.

Conclusions:

  • The proposed ADMM-based method effectively designs constant modulus waveforms for DFRC-MIMO systems.
  • The designed waveforms offer a favorable trade-off between radar and communication performance.
  • Simulation results validate the effectiveness of the proposed waveform design approach.