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Low complexity adaptation for SISO channel shortening equalizers

Avinash, Mohan and Hari, KVS (2012) Low complexity adaptation for SISO channel shortening equalizers. In: AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, 66 (8). pp. 600-604.

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Official URL: http://dx.doi.org/ 10.1016/j.aeue.2012.03.011

Abstract

Since the days of Digital Subscriber Links (DSL), time domain equalizers (TEQ's) have been used to combat time dispersive channels in Multicarrier Systems. In this paper, we propose computationally inexpensive techniques to recompute TEQ weights in the presence of changes in the channel, especially over fast fading channels. The techniques use no extra information except the perturbation to the channel itself, and provide excellent approximations to the new TEQ weights. Adaptation methods for two existing Channel shortening algorithms are proposed and their performance over randomly varying, randomly perturbed channels is studied. The proposed adaptation techniques are shown to perform admirably well for small changes in channels for OFDM systems. (C) 2012 Elsevier GmbH. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elseview
Keywords: Channel shortening; Low complexity; Multicarrier systems; OFDM; Time domain equalization; MSSNR
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 25 Jul 2012 10:16
Last Modified: 25 Jul 2012 10:16
URI: http://eprints.iisc.ernet.in/id/eprint/44870

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