适合传输三路数据流的最小距离MIMO 预编码

doi:10.3969/j.issn.0255-8297.2013.02.005

Abstract

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

CLC Number:

TN911.22

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.

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Minimum Distance-Based MIMO Precoding for Triple-Stream Transmission

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