Quasi-orthogonal space-time-frequency trellis codes for two transmit antennas

Authors:
Jorge Flores;Jaime Sánchez;Hamid Jafarkhani
Affiliations:
Department of Electronic and Telecommunications, CICESE Research Center, Ensenada, B. C., México;Department of Electronic and Telecommunications, CICESE Research Center, Ensenada, B. C., México;Department of Electrical Engineering & Computer Science, University of California at Irvine, Irvine, CA
Venue:
IEEE Transactions on Wireless Communications
Year:
2010

Citing 8
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Abstract

In this letter, we propose two full-rate spacetime-frequency trellis code (STFTC) designs for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The first proposal based on rotating constellation is called extended super-orthogonal STFTC (Ex-SOSTFTC). The second proposal, called Quasi-Orthogonal STFTCs (QOSTFTCs), combines set partitioning and the structure of quasi-orthogonal space-frequency designs in a systematic way. In addition to spatial diversity, the proposed codes provide multipath diversity and achieve high-coding gain over a frequency selective fading channel. Simulation results show the proposed codes significantly outperform the existing STFTC designs.