Selection of the Coordination Strategy in the Network MIMO Downlink

Network MIMO or distributed MIMO is one promising strategy to increase the data rates in future cellular communication systems. However, well-known schemes like linear preequalization or Tomlinson-Harashima precoding for handling the multiuser interference assume full coordination (via some centralized processing) between the base stations. This approach causes significant traffic in the (wired) backhaul. In this paper, decentralized strategies with partial coordination are considered. A selection algorithm is presented, which, given the actual MIMO channel, automatically chooses the amount of coordination which is necessary to achieve a predefined performance. The trade-off between the achievable reduction in backhaul signaling and the required signal-to-noise ratio to not exceed a tolerated bit error rate is discussed. The proposed strategies are covered by means of numerical simulations.

[1]  Jos F. Sturm,et al.  A Matlab toolbox for optimization over symmetric cones , 1999 .

[2]  Marian Codreanu,et al.  Linear Multiuser MIMO Transceiver Design With Quality of Service and Per-Antenna Power Constraints , 2008, IEEE Transactions on Signal Processing.

[3]  Reinaldo A. Valenzuela,et al.  Network coordination for spectrally efficient communications in cellular systems , 2006, IEEE Wireless Communications.

[4]  M. Joham,et al.  MMSE Approaches to Multiuser Spatio-Temporal Tomlinson-Harashima Precoding , 2004 .

[5]  Robert F. H. Fischer,et al.  Hierarchical Precoding for the Network MIMO Downlink , 2015 .

[6]  Robert F. H. Fischer,et al.  Network MIMO Downlink Transmission , 2010 .

[7]  Robert F. H. Fischer,et al.  The Network MIMO Downlink with Per-Antenna Power Constraint: Linear Preequalization vs. Tomlinson-Harashima Precoding , 2013, WSA.

[8]  Ami Wiesel,et al.  Linear precoding via conic optimization for fixed MIMO receivers , 2006, IEEE Transactions on Signal Processing.

[9]  Wei Yu,et al.  Transmitter Optimization for the Multi-Antenna Downlink With Per-Antenna Power Constraints , 2007, IEEE Transactions on Signal Processing.

[10]  Christoph Windpassinger,et al.  Detection and Precoding for Multiple Input Multiple Output Channels , 2004 .

[11]  Robert F. H. Fischer,et al.  Precoding and Signal Shaping for Digital Transmission , 2002 .

[12]  Robert F. H. Fischer,et al.  MIMO precoding for decentralized receivers , 2002, Proceedings IEEE International Symposium on Information Theory,.