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Journal of Applied Sciences >

2013 , Vol. 31 >Issue 2: 135 - 141

DOI: https://doi.org/10.3969/j.issn.0255-8297.2013.02.005

Communication Engineering

Minimum Distance-Based MIMO Precoding for Triple-Stream Transmission

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  • 1. Department of Electronic Engineering and Information Science, University of Science and
    Technology of China, Hefei 230027, China
    2. Qualcomm Incorporated, San Diego, CA 92121, USA

Received date: 2012-01-09

  Revised date: 2012-12-19

  Online published: 2012-12-19

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Abstract

A new MIMO precoding method is proposed based on maximizing the minimum Euclidean distance between points in the received signal space for triple-stream transmission. Under a real-valued rotation matrix constraint, the proposed algorithm solves the non-convex optimization problem with two steps from
the geometric viewpoint, named offline step and online step, respectively. In the offline step, all feasible surfaces are collected by expanding quadric surfaces within 3-dimensional space. In the online step, the precoder matrix is constructed with respect to the unique feasible surface chosen by particular channel implementation. Meanwhile, a closed-form expression of the minimum distance is also provided in this paper. Simulation results validate that the proposed method not only outperforms existing schemes with low computational complexity, but also has superior performance of more than 3 dB in terms of bit-error-rate (BER) with increase of the quadrature amplitude modulation (QAM) constellations.

Key words： MIMO; precoder; minimum Euclidean distance; surface expanding

Cite this article

GU Qiang1, XU Xiao-dong1, JIANG Yi2, DAI Xu-chu1 . Minimum Distance-Based MIMO Precoding for Triple-Stream Transmission[J]. Journal of Applied Sciences, 2013 , 31(2) : 135 -141 . DOI: 10.3969/j.issn.0255-8297.2013.02.005

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