Research on critical SNR and power allocation of artificial noise assisted secure transmission

Hao DENG; Huiming WANG

doi:10.11959/j.issn.1000-436x.2019114

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Research on critical SNR and power allocation of artificial noise assisted secure transmission

Papers | 更新时间：2024-06-05

- Research on critical SNR and power allocation of artificial noise assisted secure transmission
- Journal on Communications Vol. 40, Issue 6, Pages: 66-73(2019)
- 作者机构：
  
  1. 河南大学物理与电子学院，河南开封 450004
  2. 西安交通大学电子与信息工程学院，陕西西安 710049
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61640005);The National Natural Science Foundation of China(61671364);The Young Talent Support Fund of Science and Technology of Shaanxi Province(2015KJXX-01)
- DOI：10.11959/j.issn.1000-436x.2019114
  CLC： TN919.3
- Online First：2019-06，
  
  Published：25 June 2019
- 稿件说明：
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Hao DENG, Huiming WANG. Research on critical SNR and power allocation of artificial noise assisted secure transmission[J]. Journal on Communications, 2019, 40(6): 66-73.
DOI：

Hao DENG, Huiming WANG. Research on critical SNR and power allocation of artificial noise assisted secure transmission[J]. Journal on Communications, 2019, 40(6): 66-73. DOI： 10.11959/j.issn.1000-436x.2019114.

摘要

给出了多输入单输出窃听链路中人工噪声策略安全性能的统一分析。通过对私密信号和人工噪声之间最优功率分配的研究，发现人工噪声策略不是在所有情况下都能有效提升系统的安全性，同时给出了人工噪声工作的临界信噪比。此外，基于保密速率的下界得出了适应任意信噪比的功率分配表达式，据此推导出了未知窃听用户统计信道信息情况下的功率分配结果。仿真结果显示，相对于平均功率分配策略，所提功率分配方案可以有效增大系统的保密速率。

Abstract

A comprehensive performance analysis of artificial noise (AN) assisted secure transmission in multiple-input single-output (MISO) wiretap channels was presented.It was shown that the AN scheme did not always improve the security

and provided an exact signal-to-noise ratio (SNR) threshold below which AN did not work.An explicit result of the optimal power allocation (OPA) using the lower bound to the ergodic secrecy rate (ESR) was presented and the OPA for the worst case without the knowledge of the eavesdropper’s relative distance was also provided.Simulations demonstrate that the proposed power allocation result achieves a higher ESR than the equal one.

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references

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