Open Access

Maximum SINR Synchronization Strategies in Multiuser Filter Bank Schemes

EURASIP Journal on Wireless Communications and Networking20102010:745128

https://doi.org/10.1155/2010/745128

Received: 23 November 2009

Accepted: 21 July 2010

Published: 3 August 2010

Abstract

We consider synchronization in a multiuser filter bank uplink system with single-user detection. Perfect user synchronization is not the optimal choice as the intuition would suggest. To maximize performance the synchronization parameters have to be chosen to maximize the signal-to-interference-plus-noise ratio (SINR) at each equalizer subchannel output. However, the resulting filter bank receiver structure becomes complex. Therefore, we consider two simplified synchronization metrics that are based on the maximization of the average SINR of a given user or the aggregate SINR of all users. Furthermore, a relaxation of the aggregate SINR metric allows implementing an efficient multiuser analysis filter bank. This receiver deploys two fractionally spaced analysis stages. Each analysis stage is efficiently implemented via a polyphase filter bank, followed by an extended discrete Fourier transform that allows the user frequency offsets to be partly compensated. Then, sub-channel maximum SINR equalization is used. We discuss the application of the proposed solution to Orthogonal Frequency Division Multiple Access (OFDMA) and multiuser Filtered Multitone (FMT) systems.

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Authors’ Affiliations

(1)
Dipartimento di Ingegneria Elettrica Gestionale e Meccanica (DIEGM), Università di Udine

Copyright

© Francesco Pecile and Andrea M. Tonello. 2010

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.