|Pages||2241 - 2246|
|Number of pages||6|
|Journal||IEEE Wireless Communications and Networking Conference|
|Journal publication date||Mar 2007|
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.
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
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- space time block codes, intersymbol interference, delay spread, multipath fading, adaptive equalization
IEEE Wireless Communications and Networking Conference, 2007 (WCNC 2007)
|Duration||1 Mar 2007 → …|