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A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals.

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This study introduces a wireless spectrum hypervisor to boost spectral efficiency in mobile networks. The architecture enables sharing radio frequency front-ends among multiple wireless technologies, reducing costs and improving spectrum utilization.

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MTCNB-IoTcognitive radiosinfrastructure sharingmulti-tenancynetwork densificationradio virtualization

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Area of Science:

  • Wireless Communications and Networking
  • Signal Processing
  • Network Architecture

Background:

  • Increasing traffic load in next-generation wireless networks necessitates enhanced spectral efficiency.
  • Limited spectrum programmability in current networks hinders flexible spectrum access.
  • The need for novel architectures to multiplex diverse radio access technologies (RATs) sharing infrastructure.

Purpose of the Study:

  • To propose a wireless spectrum hypervisor architecture for abstracting radio frequency (RF) front-ends.
  • To enable flexible spectrum access and improve spectral efficiency in existing wireless and mobile networks.
  • To facilitate infrastructure sharing and dynamic access to vacant spectrum chunks.

Main Methods:

  • Development of a non-intrusive, optimized wireless hypervisor architecture.
  • Abstraction of a single RF front-end into multiple virtual RF front-ends.
  • Multiplexing concurrent multi-carrier-based RATs with correlated numerologies (e.g., Wi-Fi, LTE, 5G-NR, NB-IoT).

Main Results:

  • Mathematical demonstration of the proposed approach's functionality.
  • Simulation results validating the architecture's efficiency in improving spectral efficiency.
  • An open-source prototype successfully handled up to 12 concurrent physical layers.

Conclusions:

  • The proposed wireless spectrum hypervisor architecture effectively enhances spectral efficiency.
  • Infrastructure sharing and dynamic spectrum access are key benefits.
  • The open-source prototype provides a viable platform for research and development in advanced wireless systems.