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Multi-stage beamforming for interference coordination in massive MIMO networks

: Kurras, M.; Thiele, L.; Caire, G.


Matthews, M.B. ; IEEE Signal Processing Society:
49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015 : November 8-11, 2015, Pacific Grove, California
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4673-8576-3 (electronic)
ISBN: 978-1-4673-8574-9 (CD-ROM)
ISBN: 978-1-4673-8575-6 (USB)
ISBN: 978-1-4673-8577-0 (Print on Demand)
Asilomar Conference on Signals, Systems & Computers (ACSSC) <49, 2015, Pacific Grove/Calif.>
Fraunhofer HHI ()

Recently we showed that the joint space division and multiplexing (JSDM) framework for massive MIMO can applied to hybrid beamforming for interference coordination between multiple base station sites. JSDM explicitly distinguishes between pre-beamforming based on long-term channel (covariance) statistics and precoding based on instantaneous channel state information. In this work provide we extend the JSDM framework to multiple base stations and demonstrate that already with a suboptimal solution using a limited set of predefined first-stage precoding vectors a huge portion of the gap between the uncoordinated and single-node case can be closed.