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Impact of channel estimation errors on the performance of DFE equalizers with space time block codes in wideband fading channels

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)2241 - 2246
Number of pages6
JournalIEEE Wireless Communications and Networking Conference
StatePublished - Mar 2007
EventIEEE Wireless Communications and Networking Conference, 2007 (WCNC 2007) - Kowloon, China


Multiple-input multiple output (MIMO) techniques can be applied to radio systems to enhance performance in fading channels, to exploit spatial and temporal diversity, and to increase the potential transmission rate. Here we investigate the combination of decision feedback equalizers (DFE's) with Alamouti space-time block codes (STBQ) in time-varying wideband channels. Most prior work considers the use of STBC in flat-fading channels. However, for many mobile applications, time and frequency selectivity in the wireless channel must be included in the analysis. As a result of delay spread and terminal mobility, the transmitted data stream can suffer from severe time varying inter symbol interference (ISI) which requires a form of channel equalization. For a quasi-static environment Alamouti's linear combining scheme provides a reliable and low complexity MIMO solution when perfect channel state information (CSI) is available. In this paper we address the mitigation of wideband channels effects on Alamouti STBC codes. The study considers the minimum mean square error (MMSE) performance as a function of channel estimation error for maximum likelihood (ML) and DFE equalizers.

Additional information

Publisher: Institution of Electrical and Electronics Engineers, Inc. (IEEE) Name and Venue of Conference: 2007 IEEE Wireless Communications and Networking Conference, WCNC 2007, Kowloon China Rose publication type: Conference contribution Additional information: With accompanying conference poster Terms of use: Copyright © 2007 IEEE. Reprinted from IEEE Wireless Communications and Networking Conference, 2007 (WCNC 2007). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or 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 must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • space time block codes, intersymbol interference, delay spread, multipath fading, adaptive equalization


IEEE Wireless Communications and Networking Conference, 2007 (WCNC 2007)

Duration1 Mar 2007 → …

Event: Conference

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