On the Maximum Achievable Sum-Rate of Interfering Two-Way Relay Channels
Journal article, 2012

Hierarchical networks can provide very high data rates to multiple mobile stations (MSs) through a dense network of fixed relay nodes (RNs) fed by few hub base stations (HBSs). In order to achieve high spectral efficiencies RNs can act as two-way RNs. However the dense RN deployment gives rise to high co-channel interference (CCI) that limits sum-rate performance. In this letter we consider a simple hierarchical network consisting of an HBS with two highly directional antennas communicating with two MSs via two interfering two-way RNs. To mitigate CCI and boost sum-rates we propose a two-way relaying strategy based on AF combined with Network MIMO processing which is applied over the concatenation of the backhaul and access network channels. We compare our proposed strategy with a baseline DF approach and we show that it performs significantly better when CCI is dominant.

Network MIMO


Two-way relay channels

network coding



Agisilaos Papadogiannis

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Alister Burr

University of York

Meixia Tao

Shanghai Jiao Tong University

IEEE Communications Letters

1089-7798 (ISSN) 15582558 (eISSN)

Vol. 16 1 72-75 6093917

Areas of Advance

Information and Communication Technology

Subject Categories




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