Shifting the MIMO Paradigm

@article{Gesbert2007ShiftingTM,
  title={Shifting the MIMO Paradigm},
  author={David Gesbert and Marios Kountouris and Robert W. Heath and Chan-Byoung Chae and Thomas E. S{\"a}lzer},
  journal={IEEE Signal Processing Magazine},
  year={2007},
  volume={24},
  pages={36-46}
}
Multi-user MIMO (MU-MIMO) networks reveal the unique opportunities arising from a joint optimization of antenna combining techniques with resource allocation protocols. Furthermore, it brings robustness with respect to multipath richness, allowing for compact antenna spacing at the BS and, crucially, yielding the diversity and multiplexing gains without the need for multiple antenna user terminals. To realize these gains, however, the BS should be informed with the user's channel coefficients… 
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