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Super-quasiorthogonal space-time trellis codes for four transmit antennas with rectangular signal constellations

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Abstract

In this paper, we present the first super-quasiorthogonal space-time trellis codes (SQOSTTCs) for systems with four transmit antennas using various types of rectangular signal constellations to increase the spectral efficiency up to 5 bits/s/Hz. In our wireless communications system, we define an eight-dimensional (8D) signal constellation as Cartesian product of four two-dimensional (2D) rectangular signal sets. The transmission of an 8D point from the first antenna is achieved by transmitting four concatenated 2D points in four consecutive channel uses. The 2D symbols transmitted from the other three antennas are not independent but so chosen as to form, together with the symbols transmitted from the first antenna, the entries of a 4×4 quasiorthogonal transmission matrix. The union of two sets of quasiorthogonal transmission matrices forms a so-called super-quasiorthogonal signal set. With the 4×4 quasiorthogonal transmission matrices, we then label the state transitions of a trellis diagram describing the operation of the encoder. The simulation results of the frame error rate and the bit error rate demonstrate the excellent performance of our proposed SQOSTTCs.

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Acknowledgements

The authors are grateful to the anonymous reviewers for their positive criticism and for their valuable comments, which greatly helped to improve the paper and to make it more readable.

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Authors and Affiliations

  1. Polytechnic University of Bucharest, Bucharest, Romania

    Corneliu Eugen D. Sterian

  2. University of Agder, Grimstad, Norway

    Yi Wu & Matthias Pätzold

Authors
  1. Corneliu Eugen D. Sterian
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  2. Yi Wu
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  3. Matthias Pätzold
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Correspondence to Yi Wu.

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Sterian, C.E.D., Wu, Y. & Pätzold, M. Super-quasiorthogonal space-time trellis codes for four transmit antennas with rectangular signal constellations. Ann. Telecommun. 63, 331–350 (2008). https://doi.org/10.1007/s12243-008-0031-8

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  • DOI: https://doi.org/10.1007/s12243-008-0031-8

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