On the Diversity-Multiplexing Tradeoff of Multiuser Amplify & Forward Multihop Networks


Jörg Wagner and Armin Wittneben


Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2009.

DOI: 10.1109/ACSSC.2009.5470129

[BibTeX, LaTeX, and HTML Reference]


We consider an amplify & forward multihop network with n single-antenna nodes in the source and destination stage each, as well as n_R^(l), l in {1, . . . , L}, single-antenna relay nodes in the l-th relay stage. The relay gain allocation scheme proposed in [1] decouples this network into parallel single-input single-output (SISO) links between n source-destination pairs under certain conditions on the network topology. Hence, all degrees of freedom are achieved in a distributed fashion. We extend this as follows: for i.i.d. CN(0, 1) fading coefficients and SISO coding/decoding at source and destination nodes, we derive an upper-bound on the diversity-multiplexing tradeoff curve of the network. Moreover, we devise a scheme that we conjecture to achieve the bound, if the network can be decoupled and L \geq 2.

Download this document:


Copyright Notice: © 2009 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.