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Linear angular momentum multiplexing offers spectrally efficient communication for moving systems. This method, derived from orbital angular momentum multiplexing, is validated by 2.4 GHz measurements for transport applications.

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Area of Science:

  • Physics
  • Electrical Engineering
  • Wireless Communications

Background:

  • Orbital angular momentum (OAM) multiplexing enables novel communication methods.
  • Short-range communication for high-speed transport systems presents unique challenges.

Purpose of the Study:

  • To introduce and describe linear angular momentum (LAM) multiplexing as an evolution of OAM multiplexing.
  • To identify key parameters for implementing LAM multiplexing in mobile communication scenarios.
  • To assess the performance and resilience of LAM multiplexing in realistic channel conditions.

Main Methods:

  • Theoretical derivation of LAM multiplexing from OAM principles.
  • Identification of critical implementation parameters: array length, antenna characteristics, and element spacing.
  • Short-range experimental validation at 2.4 GHz.
  • Modeling of the Rice fading channel to assess multipath resilience.

Main Results:

  • LAM multiplexing provides a framework for spectrally efficient communication in transverse motion scenarios.
  • Key parameters influencing LAM multiplexing performance were identified and analyzed.
  • Experimental data at 2.4 GHz supported the theoretical model.
  • Resilience to multipath fading was evaluated through channel modeling.

Conclusions:

  • LAM multiplexing is a viable technique for short-range, high-spectral-efficiency communication in dynamic environments.
  • The study provides essential parameters and experimental validation for LAM multiplexing implementation.
  • This technology has direct applications in rail, vehicle, and hyperloop transport systems.