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Linear angular momentum multiplexing-conceptualization and experimental evaluation with antenna arrays
Tim W C Brown1, Ben H Allen2,3, Timothy D Drysdale4
1Institute for Communication, Systems, University of Surrey, Guildford GU2 7XH, UK.
Proceedings. Mathematical, Physical, and Engineering Sciences
|November 20, 2020
Summary
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.
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.
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