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In this chapter, we develop modeling and analysis to compare performance of co-located and cell-free massive MIMO (mMIMO) based underlay spectrum sharing networks in terms of interference outage probability (IOP) and spectral efficiency (SE). We consider that the secondary co-located and cell-free mMIMO systems operate based on estimates acquired via shared pilots and under an IOP constraint. This constraint controls the fraction of time interference threshold is exceeded at any of the primary users (PUs). Based on this study, we conclude that cell-free mMIMO based underlay network gives lower IOP at PUs and improves SE of PUs and weaker secondary users when compared to users in co-located mMIMO networks.

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Co-located and Cell-Free Massive MIMO Based Underlay Spectrum Sharing Networks

  • 章节

  • 发表日期：

    2025年

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  • Enukonda Venkata Pothan,
  • Salil Kashyap

摘要

In this chapter, we develop modeling and analysis to compare performance of co-located and cell-free massive MIMO (mMIMO) based underlay spectrum sharing networks in terms of interference outage probability (IOP) and spectral efficiency (SE). We consider that the secondary co-located and cell-free mMIMO systems operate based on estimates acquired via shared pilots and under an IOP constraint. This constraint controls the fraction of time interference threshold is exceeded at any of the primary users (PUs). Based on this study, we conclude that cell-free mMIMO based underlay network gives lower IOP at PUs and improves SE of PUs and weaker secondary users when compared to users in co-located mMIMO networks.