NDLI: Widely linear equalization for space-time block-coded transmission over fading ISI channels

Content Provider	IEEE Xplore Digital Library
Author	Gerstacker, W.H. Obernosterer, F. Schober, R. Lehmann, A. Lampe, A. Gunreben, P.
Copyright Year	2002
Description	Author affiliation: Laboratorium fur Nachrichtentechnik, Erlangen-Nurnberg Univ., Erlangen, Germany (Gerstacker, W.H.)
Abstract	We develop receivers for transmission with space-time block codes (STBCs) over fading intersymbol interference (ISI) channels. The focus lies on Alamouti's STBC, but the results may be generalized to related codes. It turns out that a straightforward combination of conventional equalizers and a space-time block decoder is only possible if at least as many receive antennas as transmit antennas are employed, but not for the practically interesting case of pure transmit diversity. This restriction is circumvented by our approach. Equalizers with widely linear (WL) processing are designed, exploiting the structure of Alamouti's STBC, which is shown to produce an improper (rotationally variant) transmit signal. The presented receivers are especially well suited for high-level modulated signals, which are used in third-generation time-division multiple access (TDMA) mobile communications standards such as EDGE (enhanced data rates for GSM evolution). In contrast to block-based STBCs which have recently been proposed for ISI channels, our approach of combining a symbol-based STBC and equalization can be easily accommodated to channels with time-variant behaviour inside a transmission burst. Furthermore, for our scheme, the present burst structure of the EDGE system can be retained.
Starting Page	238
Ending Page	242
File Size	297139
Page Count	5
File Format	PDF
ISBN	0780374673
ISSN	10903038
DOI	10.1109/VETECF.2002.1040340
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-09-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Intersymbol interference Equalizers Receiving antennas Block codes Decoding Transmitting antennas Diversity reception Process design Signal design
Content Type	Text
Resource Type	Article

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