Optimizing Zero-Forcing Based Gain Allocation for Wireless Multiuser Networks
AuthorsCelal Esli, Stefan Berger, and Armin Wittneben
ReferenceIEEE International Conference on Communications (ICC), 2007, pp. 5825 - 5830 , June 2007.
AbstractWe consider a wireless multiuser network where a number of source/destination pairs communicate concurrently over the same physical channel. A set of amplify-and-forward relay nodes assist the communication by multiplying their received signal with a complex gain factor before retransmission. We propose and compare different strategies for finding the gain factor for every relay terminal, motivated by the chosen figures of merit: average sum rate, diversity, and fairness. A new and practical definition of diversity is provided in the context of our system model. For each strategy we investigate the provided gains in terms of the figures of merit, and the trade-off between them. An MMSE-based scheme and an asymptotic zero-forcing scheme act as references to the proposed schemes.
Keywordscooperative relaying, ad-hoc networks, multiuser zero forcing relaying, diversity, fairness.
Download this document:
Copyright Notice: © 2007 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.