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Satellite-Assisted Cell-Free Massive MIMO Systems with Multi-Group Multicast.

Jiamin Li1, Lingling Chen2, Pengcheng Zhu1

  • 1National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China.

Sensors (Basel, Switzerland)
|September 28, 2021
PubMed
Summary

This study enhances cell-free massive MIMO systems using satellite-assisted and multicast strategies to reduce network congestion and boost data efficiency. Simulations confirm significant improvements in average system spectrum efficiency (SE).

Keywords:
cell-free massive MIMOmulti-group multicastsatellite-assisted

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Area of Science:

  • Wireless Communication
  • Telecommunications Engineering
  • Signal Processing

Background:

  • Cell-free massive MIMO systems face challenges with ground traffic pressure and data transmission efficiency.
  • Existing systems require innovative solutions to optimize performance and capacity.

Purpose of the Study:

  • To improve data transmission efficiency in cell-free massive MIMO systems.
  • To alleviate ground traffic pressure using novel mechanisms.
  • To enhance overall system spectrum efficiency (SE).

Main Methods:

  • Utilizing satellite-assisted and multi-group multicast mechanisms.
  • Estimating channel state information (CSI) via a common pilot scheme.
  • Deriving closed-form expressions for achievable rates with Maximum Ratio Transmission (MRT) and Zero-Forcing (ZF) precoding.

Main Results:

  • Closed-form expressions for achievable rates were derived and validated through simulations.
  • The proposed satellite-assisted and multicast approach significantly improves average system spectrum efficiency (SE).

Conclusions:

  • Satellite-assisted and multi-group multicast mechanisms are effective in enhancing cell-free massive MIMO systems.
  • The integration of these technologies offers a promising solution for future wireless networks.
  • The study validates the theoretical derivations through practical simulation results.