人工噪聲輔助的物理層安全信號峰均功率比減低算法

洪濤; 張更新

doi:10.11999/JEIT170739

人工噪聲輔助的物理層安全信號峰均功率比減低算法

doi: 10.11999/JEIT170739

洪濤¹,
張更新¹

基金項目:

國家自然科學基金(91738201, 61302102)，江蘇省屬高校自然科學研究面上項目(13KJB510023)

計量
- 文章訪問數: 1476
- HTML全文瀏覽量: 140
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- 被引次數: 0
出版歷程
- 收稿日期: 2017-07-20
- 修回日期: 2018-03-19
- 刊出日期: 2018-06-19

Peak-to-average Power Ratio Reduction Algorithm of Artificial-noise-aided Secure Signal

HONG Tao¹,
ZHANG Gengxin¹

Funds:

The National Natural Science Foundation of China (91738201, 61302102), The Natural Science Foundation of the university of Jiangsu Province (13KJB510023)

摘要

摘要: 人工噪聲輔助的物理層安全通信系統(tǒng)采用人工噪聲破壞竊聽信道的方式提升系統(tǒng)安全信道容量是近年來物理層安全通信領域研究的經典系統(tǒng)模型之一。該文針對這一模型中發(fā)射信號存在高峰均功率比問題，利用噪聲子空間提供的冗余度提出一種基于噪聲子空間功率分配的峰均功率比降低算法。該算法通過分式規(guī)劃、DC規(guī)劃以及二次非凸等式約束松弛將非凸的峰均功率比優(yōu)化問題轉化為一系列的凸問題迭代求解。仿真結果表明在系統(tǒng)放大器存在一定線性范圍的約束下，該文提出的算法能夠有效降低人工噪聲輔助的物理層安全通信系統(tǒng)發(fā)射信號的峰均功率比問題，達到提高系統(tǒng)中合法用戶的通信性能的目的。
- 無線通信 /
- 物理層安全 /
- 人工噪聲輔助 /
- 功率分配 /
- 凸優(yōu)化
Abstract: The research of improving the Secrecy Capacity (SC) of wireless communication system using Artificial Noise (AN) is one of the classics models in the field of physical layer security communication. Considering the Peak-to-Average Power Ratio (PAPR) problem of transmit signal, a power allocation of AN subspaces algorithm is proposed to reduce the PAPR of transmit signal based on convex optimization. This algorithm utilizes a series of convex optimization problems to approach the nonconvex PAPR optimization problem based on fractional programming, Difference of Convex (DC) functions programming and nonconvex quadratic equality constraint transformation. Simulation results show that the proposed algorithm reduce the PAPR value of transmit signal to improve the communication performance of legitimate user compared with benchmark problems.
- Wireless communication /
- Physical layer security /
- Artificial Noise (AN) aided /
- Power allocation /
- Convex optimization

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參考文獻(19)

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