Artificial-Noise-Aided Secure Transmission With Directional Modulation Based on Random Frequency Diverse Arrays

In this paper, a random frequency diverse array-based directional modulation with artificial noise (RFDA-DM-AN) scheme is proposed to enhance physical layer security of wireless communications. Specifically, we first design the RFDA-DM-AN scheme by randomly allocating frequencies to transmit antenna...

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Main Authors: Jinsong Hu, Shihao Yan, Feng Shu, Jiangzhou Wang, Jun Li, Yijin Zhang
Format: Article
Language:English
Published: IEEE 2017-01-01
Series:IEEE Access
Subjects:
Online Access:https://ieeexplore.ieee.org/document/7817778/
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spelling doaj-900860906f444dff956f4fec50d8ba762021-03-29T20:00:07ZengIEEEIEEE Access2169-35362017-01-0151658166710.1109/ACCESS.2017.26531827817778Artificial-Noise-Aided Secure Transmission With Directional Modulation Based on Random Frequency Diverse ArraysJinsong Hu0Shihao Yan1Feng Shu2https://orcid.org/0000-0003-0073-1965Jiangzhou Wang3Jun Li4https://orcid.org/0000-0002-6767-3328Yijin Zhang5School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaResearch School of Engineering, Australian National University, Canberra, ACT, AustraliaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaSchool of Engineering and Digital Arts, University of Kent, Canterbury, U.K.School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaIn this paper, a random frequency diverse array-based directional modulation with artificial noise (RFDA-DM-AN) scheme is proposed to enhance physical layer security of wireless communications. Specifically, we first design the RFDA-DM-AN scheme by randomly allocating frequencies to transmit antennas, thereby achieving 2-D (i.e., angle and range) secure transmissions, and outperforming the state-of-the-art 1-D (i.e., angle) phase array (PA)-based DM scheme. Then we derive the closed-form expression of a lower bound on the ergodic secrecy capacity (ESC) of our RFDA-DM-AN scheme. Based on the theoretical lower bound derived, we further optimize the transmission power allocation between the useful signal and artificial noise (AN) in order to improve the ESC. Simulation results show that: (1) our RFDA-DM-AN scheme achieves a higher secrecy capacity than that of the PA-based DM scheme; (2) the lower bound derived is shown to approach the ESC as the number of transmit antennas N increases and precisely matches the ESC when N is sufficiently large; and (3) the proposed optimum power allocation achieves the highest ESC of all power allocations schemes in the RFDA-DM-AN.https://ieeexplore.ieee.org/document/7817778/Physical layer securitydirectional modulationfrequency diverse arraypower allocation
collection DOAJ
language English
format Article
sources DOAJ
author Jinsong Hu
Shihao Yan
Feng Shu
Jiangzhou Wang
Jun Li
Yijin Zhang
spellingShingle Jinsong Hu
Shihao Yan
Feng Shu
Jiangzhou Wang
Jun Li
Yijin Zhang
Artificial-Noise-Aided Secure Transmission With Directional Modulation Based on Random Frequency Diverse Arrays
IEEE Access
Physical layer security
directional modulation
frequency diverse array
power allocation
author_facet Jinsong Hu
Shihao Yan
Feng Shu
Jiangzhou Wang
Jun Li
Yijin Zhang
author_sort Jinsong Hu
title Artificial-Noise-Aided Secure Transmission With Directional Modulation Based on Random Frequency Diverse Arrays
title_short Artificial-Noise-Aided Secure Transmission With Directional Modulation Based on Random Frequency Diverse Arrays
title_full Artificial-Noise-Aided Secure Transmission With Directional Modulation Based on Random Frequency Diverse Arrays
title_fullStr Artificial-Noise-Aided Secure Transmission With Directional Modulation Based on Random Frequency Diverse Arrays
title_full_unstemmed Artificial-Noise-Aided Secure Transmission With Directional Modulation Based on Random Frequency Diverse Arrays
title_sort artificial-noise-aided secure transmission with directional modulation based on random frequency diverse arrays
publisher IEEE
series IEEE Access
issn 2169-3536
publishDate 2017-01-01
description In this paper, a random frequency diverse array-based directional modulation with artificial noise (RFDA-DM-AN) scheme is proposed to enhance physical layer security of wireless communications. Specifically, we first design the RFDA-DM-AN scheme by randomly allocating frequencies to transmit antennas, thereby achieving 2-D (i.e., angle and range) secure transmissions, and outperforming the state-of-the-art 1-D (i.e., angle) phase array (PA)-based DM scheme. Then we derive the closed-form expression of a lower bound on the ergodic secrecy capacity (ESC) of our RFDA-DM-AN scheme. Based on the theoretical lower bound derived, we further optimize the transmission power allocation between the useful signal and artificial noise (AN) in order to improve the ESC. Simulation results show that: (1) our RFDA-DM-AN scheme achieves a higher secrecy capacity than that of the PA-based DM scheme; (2) the lower bound derived is shown to approach the ESC as the number of transmit antennas N increases and precisely matches the ESC when N is sufficiently large; and (3) the proposed optimum power allocation achieves the highest ESC of all power allocations schemes in the RFDA-DM-AN.
topic Physical layer security
directional modulation
frequency diverse array
power allocation
url https://ieeexplore.ieee.org/document/7817778/
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