Diversity-multiplexing tradeoff in two-user fading interference channels
AuthorsCemal Akçaba and Helmut Bölcskei
ReferenceIEEE Transactions on Information Theory, Vol. 58, No. 7, pp. 4462-4480, July 2012.
AbstractWe analyze the two-user single-antenna fading interference channel with perfect receive channel state information (CSI) and no transmit CSI. The diversity-multiplexing tradeoff (DMT) region of a fixed-power-split Han and Kobayashi (HK)-type superposition coding scheme is considered and design criteria for the corresponding superposition codes are derived. We demonstrate that this scheme is DMT-optimal under strong and very strong interference by showing that it achieves a DMT region outer bound that we derive. In addition, we show that, under very strong interference, decoding interference while treating the intended signal as noise, subtracting the result out, and then decoding the desired signal, a process known as “stripping”, achieves the optimal DMT region. Our proofs reveal code design criteria for achieving DMT optimality (in the cases where we can demonstrate it).
KeywordsDiversity-multiplexing tradeoff (DMT), Han and Kobayashi (HK) superposition coding scheme, interference channel (IC)
Download this document:
Copyright Notice: © 2012 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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.