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Concatenation of trellis coded modulation and space-time block codes for high data rate on wireless systems using multiple antenna elements

Verkettung von Trellis-codierter Modulation und Raum-Zeit-Block-Codes in Funksystemen mit Antennengruppen

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Abstract

Performance results using concatenation of high-rate pragmatic TCM (trellis coded modulation) codes with a simple high-rate space-time block code operating on a multiple input/multiple output (MIMO) channel with 4 transmit and 4 receive antennas are presented. Four TCM encoders feed 4 data streams consisting of 32-QAM symbols into a simple Alamouti — like space-time code, spreading the data over 4 transmit antennas. In this way an overall data rate of 8 information bits per channel use is obtained. Perfect channel state information (CSI) at the receiver is assumed for all investigations. Using 4 receive antennas with a low complexity zero-forcing (ZF) receiver we get diversity order of approximately 6. Compared with coded V-BLAST (Foschini, 1996) operating on the same information bit rate and decoder complexity, our system performs much better for all types of spatially correlated and uncorrelated MIMO channels under investigation.

Zusammenfassung

In diesem Beitrag wird die Bitfehlerwahrscheinlichkeit in Funksystemen untersucht, in denen hochratige pragmatische TCM-Codes (Trellis-codierte Modulation) mit einem einfachen Raum-Zeit-Code seriell verkettet werden. Dabei werden Systeme mit je vier Antennen beim Sender und beim Empfänger untersucht, die acht Informationsbits pro Taktschritt übertragen. Wir nehmen an, dass der Empfänger den Übertragungskanal perfekt schätzen kann. Mit einem einfachen Zero-Forcing-Empfänger wird eine Diversität 6. Ordnung erzielt. Zum Vergleich wird eine codierte V-BLAST-Übertragung (Foschini, 1996) mit gleicher Datenrate und gleicher Decodierkomplexität simuliert. Die vorgeschlagene codierte Datenübertragung zeigt in allen untersuchten Übertragungskanälen eine wesentlich niedrigere Fehlerrate.

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Authors and Affiliations

  1. Wissenschaftlicher Mitarbeiter in Ausbildung, Austria

    G. Gritsch Dipl.-Ing.

  2. Institut für Nachrichtentechnik und Hochfrequenztechnik, Technische Universität Wien, Gußhausstraße 25/389, A-1040, Wien

    H. Weinrichter Univ.-Prof. Dipl.-Ing. Dr. techn.

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  1. G. Gritsch Dipl.-Ing.
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  2. H. Weinrichter Univ.-Prof. Dipl.-Ing. Dr. techn.
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Correspondence to G. Gritsch Dipl.-Ing..

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Gewidmet Herrn O. Univ.-Prof. Dipl.-Ing. Dr. Richard Eier anlässlich seiner Emeritierung an der TU Wien

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Gritsch, G., Weinrichter, H. Concatenation of trellis coded modulation and space-time block codes for high data rate on wireless systems using multiple antenna elements. Elektrotech. Inftech. 121, 194–199 (2004). https://doi.org/10.1007/BF03055335

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