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Enhancing Physical-Layer Secrecy in Multiantenna Wireless Systems: An Overview of Signal Processing Approaches

机译:增强多天线无线系统中的物理层保密性:信号处理方法概述

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摘要

This article provides an overview of the signal processing techniques used to enhance secrecy in the physical layer of multiantenna wireless communication systems. Motivated by results in information theory, signal processing techniques in both the data transmission and the channel estimation phases have been explored in the literature to enlarge the signal quality difference at the destination and the eavesdropper. In the data transmission phase, secrecy beamforming and precoding schemes are used to enhance signal quality at the destination while limiting the signal strength at the eavesdropper. Artificial noise (AN) is also used on top of beamformed or precoded signals to further reduce the reception quality at the eavesdropper. In the channel estimation phase, training procedures are developed to enable better channel estimation performance at the destination than at the eavesdropper. As a result, the effective signal-to-noise ratios (SNRs) at the two terminals will be different and a more favorable secrecy channel will be made available for use in the data transmission phase. Finally, future research directions are discussed.
机译:本文提供了用于增强多天线无线通信系统物理层中的保密性的信号处理技术的概述。受信息论结果的激励,文献中已经研究了数据传输和信道估计阶段的信号处理技术,以扩大目的地和窃听者的信号质量差异。在数据传输阶段,使用保密波束成形和预编码方案来增强目的地的信号质量,同时限制窃听者的信号强度。人造噪声(AN)也用于波束成形或预编码信号的顶部,以进一步降低窃听者的接收质量。在信道估计阶段,开发了训练程序以使目的地处的信道估计性能比窃听者更好。结果,两个终端处的有效信噪比(SNR)将不同,并且将使更有利的保密通道可用于数据传输阶段。最后,讨论了未来的研究方向。

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  • 来源
    《IEEE Signal Processing Magazine》 |2013年第5期|29-40|共12页
  • 作者

    Hong; Y.; Lan; P.; Kuo; C.;

  • 作者单位

    Institute of Communications Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan|c|;

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  • 原文格式 PDF
  • 正文语种 eng
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