Print Email Facebook Twitter Iterative equalization for OFDM systems over wideband Multi-Scale Multi-Lag channels Title Iterative equalization for OFDM systems over wideband Multi-Scale Multi-Lag channels Author Xu, T. Tang, Z. Remis, R. Leus, G. Faculty Electrical Engineering, Mathematics and Computer Science Department Microelectronics Date 2012-08-01 Abstract OFDM suffers from inter-carrier interference (ICI) when the channel is time varying. This article seeks to quantify the amount of interference resulting from wideband OFDM channels, which are assumed to follow the multi-scale multi-lag (MSML) model. The MSML channel model results in full channel matrices both in the frequency and time domains. However, banded approximations are possible, leading to a significant reduction in the equalization complexity. Measures for determining whether a time-domain or frequency-domain approach should be undertaken are provided based on the interference analysis, and we propose to use the conjugate gradient (CG) algorithm to equalize the channel iteratively. The suitability of a preconditioning technique, that often accompanies the CG method to accelerate the convergence, is also discussed. We show that in order for the diagonal preconditioner to function properly, optimal resampling is indispensable To reference this document use: http://resolver.tudelft.nl/uuid:42cbbd38-b513-4cdb-88cf-2927ff1b83d5 DOI https://doi.org/10.1186/1687-1499-2012-280 Publisher Springer-Verlag ISSN 1687-1499 Source http://link.springer.com/article/10.1186/1687-1499-2012-280 Source EURASIP Journal on Wireless Communications and Networking, 280, 2012 Part of collection Institutional Repository Document type journal article Rights © 2012 The Author(s)This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Files PDF Xu.pdf 1.56 MB Close viewer /islandora/object/uuid:42cbbd38-b513-4cdb-88cf-2927ff1b83d5/datastream/OBJ/view