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Title: Low-complexity iterative method of equalization for single carrier with cyclic prefix in doubly selective channels
Authors: Ahmed, S.
Sellathurai, Mathini
Lambotharan, Sangarapillai
Chambers, Jonathon
Keywords: Computational complexity
Doubly selective channel
Iterative equalization
Issue Date: 2006
Publisher: © IEEE
Citation: AHMED, S. ... et al., 2006. Low-complexity iterative method of equalization for single carrier with cyclic prefix in doubly selective channels. IEEE Signal Processing Letters, 13 (1), pp. 5-8.
Abstract: Orthogonal frequency division multiplexing (OFDM)requires an expensive linear amplifier at the transmitter due to its high peak-to-average power ratio (PAPR). Single carrier with cyclic prefix (SC-CP) is a closely related transmission scheme that possesses most of the benefits ofOFDMbut does not have the PAPR problem. Although in a multipath environment, SC-CP is very robust to frequency-selective fading, it is sensitive to the time-selective fading characteristics of the wireless channel that disturbs the orthogonality of the channel matrix (CM) and increases the computational complexity of the receiver. In this paper, we propose a time-domain low-complexity iterative algorithm to compensate for the effects of time selectivity of the channel that exploits the sparsity present in the channel convolution matrix. Simulation results show the superior performance of the proposed algorithm over the standard linear minimum mean-square error (L-MMSE) equalizer for SC-CP.
Description: This article was published in the journal IEEE Signal Processing Letters [© IEEE] and is also available at: http://ieeexplore.ieee.org/ 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.
Version: Published
DOI: 10.1109/LSP.2005.860552
URI: https://dspace.lboro.ac.uk/2134/5648
ISSN: 1070-9908
Appears in Collections:Published Articles (Electronic, Electrical and Systems Engineering)

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