Constructing Space-Time Trellis Codes Using Orthogonal Designs

Authors:
Girish Ganesan;Petre Stoica
Affiliations:
Department of Systems and Control, Uppsala University, P.O. Box 337, SE 751 05 Uppsala, Sweden E-mail: Girish.Ganesan@syscon.uu.se;Department of Systems and Control, Uppsala University, P.O. Box 337, SE 751 05 Uppsala, Sweden
Venue:
Wireless Personal Communications: An International Journal
Year:
2004

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Abstract

In this paper we consider the design of space-time trellis codes usingorthogonal designs. We derive a condition on the codewords to obtainthe maximum received signal energy and show that the codes based onorthogonal designs satisfy this condition.We consider in detail the design of a trellis code for two transmitantennas. The new code we develophas a higher diversity in fast fading and a higher coding gain in quasi-static fading when compared to otherexisting space-time codes. We also consider a turbo implementation ofthe new trellis code which results in very high diversity gains infast fading channels.