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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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/ |
work_keys_str_mv |
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