Multi-Cell Cooperation Using Subcarrier-Cooperative Two-Way Amplify-and-Forward Relaying
AuthorsRaphael Rolny, Marc Kuhn, Aditya Umbu Tana Amah, and Armin Wittneben
ReferenceISWCS 2013, Ilmenau, Germany, pp. 5, Aug. 2013, (invited paper).
AbstractWe consider two-way communication between multiple MIMO transceiver pairs that is assisted by non-regenerative half-duplex two-way relays. A generalized system model is formulated in which an arbitrary number of multi-antenna relays can make use of symbol extensions in frequency, e.g. OFDM subcarriers. In contrast to conventional approaches, the relays can forward arbitrary linear combinations of their receive symbols in the spatial as well as frequency domain. We apply a closed form zero-forcing approach to orthogonalize the different transceiver pairs and compare simple heuristic power allocation with numerically optimized relay gain allocation schemes. Based on simulation results, we study the advantages of cooperation between subcarriers to improve the sum rate of two-way relaying. Furthermore, we show how such a two-way relaying scheme can beneficially be implemented in a cellular network.
Download this document:
Copyright Notice: © 2013 R. Rolny, M. Kuhn, A. U. T. Amah, and A. Wittneben.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.