Antenna, Spectrum and Capacity trade-off for Cloud-RAN Massive   Distributed MIMO over Next Generation PONs
  We propose a cost-optimal antenna vs. spectrum resource allocation strategy for mobile 5G MD-MIMO over Next-Generation PONs. Comparing wavelength overlay and shared wavelength approaches, split-PHY leads to solutions with higher mobile capacity than fronthaul. 
Irene Macaluso, Bruno Cornaglia, Marco Ruffini
cs.NI