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Differential Space-Time Coding Scheme Using Star Quadrature Amplitude Modulation Method

EURASIP Journal on Advances in Signal Processing volume 2006, Article number: 089849 (2006) Cite this article

Abstract

Differential space-time coding (DSTC) has received much interest as it obviates the requirement of the channel state information at the receiver while maintaining the desired properties of space-time coding techniques. In this paper, by introducing star quadrature amplitude modulation (star QAM) method, two kinds of multiple amplitudes DSTC schemes are proposed. One is based on differential unitary space-time coding (DUSTC) scheme, and the other is based on differential orthogonal space-time coding (DOSTC) scheme. Corresponding bit-error-rate (BER) performance and coding-gain analysis are given, respectively. The proposed schemes can avoid the performance loss of conventional DSTC schemes based on phase-shift keying (PSK) modulation in high spectrum efficiency via multiple amplitudes modulation. Compared with conventional PSK-based DSTC schemes, the developed schemes have higher spectrum efficiency via carrying information not only on phases but also on amplitudes, and have higher coding gain. Moreover, the first scheme can implement low-complexity differential modulation and different code rates and be applied to any number of transmit antennas; while the second scheme has simple decoder and high code rate in the case of 3 and 4 antennas. The simulation results show that our schemes have lower BER when compared with conventional DUSTC and DOSTC schemes.

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Authors and Affiliations

  1. Information and Communication Engineering Postdoctoral Research Station, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    Xiangbin Yu & DaZhuan Xu

  2. National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China

    DaZhuan Xu & Guangguo Bi

Authors
  1. Xiangbin Yu
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  2. DaZhuan Xu
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  3. Guangguo Bi
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Correspondence to Xiangbin Yu.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Yu, X., Xu, D. & Bi, G. Differential Space-Time Coding Scheme Using Star Quadrature Amplitude Modulation Method. EURASIP J. Adv. Signal Process. 2006, 089849 (2006). https://doi.org/10.1155/ASP/2006/89849

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  • DOI: https://doi.org/10.1155/ASP/2006/89849

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