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An improved and efficient detection scheme for V-BLAST systems with QAM modulation

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Journal of Electronics (China)

Abstract

The paper proposed an improved Ordered Successive Interference Cancellation (OSIC) detection scheme for V-BLAST systems with square/rectangular Quadrature Amplitude Modulation (QAM) modulation. It utilizes an equivalent real-valued vector expression of relationship between transmit signals and received signals, exploits the constellation’s product-form structure and can eventually make the order, in which components of the transmit signals vector are extracted, more “optimal” in some sense. Thereby, it can offer an improved error probability as compared to the conventional OSIC detection scheme. In addition, the paper also proposes an efficient projection algorithm to calculate nulling vectors in a simple recursive fashion in order to avoid the vast increase of complexity, which is due to the fact that the original complex N-dimensional data vector and M × N channel matrix are transformed into a real 2N-dimensional data vector and a real 2M × 2N channel matrix respectively. A scrutinous complexity analysis shows that the complexity increases by only 33% as compared to the conventional scheme.

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Authors and Affiliations

  1. National Anti-Jamming Communications Laboratory, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Huajiong Lin, Youxi Tang & Shihai Shao

Authors
  1. Huajiong Lin
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  2. Youxi Tang
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  3. Shihai Shao
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Corresponding author

Correspondence to Huajiong Lin.

Additional information

Supported by the National Natural Science Foundation of China (No.60272009, No.60572090, No.60472045 and No.60496313).

Communication author: Lin Huajiong, born in 1979, male, Ph.D. candidate. National Anti-Jamming Communications Laboratory, University of Electronic Science and Technology of China, Chengdu 610054, China.

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Cite this article

Lin, H., Tang, Y. & Shao, S. An improved and efficient detection scheme for V-BLAST systems with QAM modulation. J. Electron.(China) 25, 588–594 (2008). https://doi.org/10.1007/s11767-007-0026-z

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  • DOI: https://doi.org/10.1007/s11767-007-0026-z

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