Next Article in Journal
Thermodynamic Investigation of an Integrated Solar Combined Cycle with an ORC System
Previous Article in Journal
An Entropy-Based Car Failure Detection Method Based on Data Acquisition Pipeline
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle

Secure Transmission in mmWave Wiretap Channels: On Sector Guard Zone and Blockages

College of Communications Engineering, Army Engineering University of PLA, No. 88 Houbiaoying, Qinhuai District, Nanjing 210007, China
School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huai’an 223300, China
Communications Research Center, Harbin Institute of Technology, Harbin 150001, China
Author to whom correspondence should be addressed.
Entropy 2019, 21(4), 427;
Received: 2 January 2019 / Revised: 14 April 2019 / Accepted: 17 April 2019 / Published: 22 April 2019
(This article belongs to the Section Information Theory, Probability and Statistics)
PDF [499 KB, uploaded 25 April 2019]


Millimeter-wave (mmWave) communication is one of the key enabling technologies for fifth generation (5G) mobile networks. In this paper, we study the problem of secure communication in a mmWave wiretap network, where directional beamforming and link blockages are taken into account. For the secure transmission in the presence of spatially random eavesdroppers, an adaptive transmission scheme is adopted, for which sector secrecy guard zone and artificial noise (AN) are employed to enhance secrecy performance. When there exists no eavesdroppers within the sector secrecy guard zone, the transmitter only transmits information-bearing signal, and, conversely, AN along with information-bearing signal are transmitted. The closed-form expressions for secrecy outage probability (SOP), connection outage probability (COP) and secrecy throughput are derived under stochastic geometry. Then, we evaluate the effect of the sector secrecy guard zone and AN on the secrecy performance. Our results reveal that the application of the sector secrecy guard zone and AN can significantly improve the security of the system, and blockages also can be utilized to improve secrecy performance. An easy choice of transmit power and power allocation factor is provided for achieving higher secrecy throughput. Furthermore, increasing the density of eavesdroppers not always deteriorates the secrecy performance due to the use of the sector secrecy guard zone and AN. View Full-Text
Keywords: physical layer security; millimeter wave; sector secrecy guard zone; artificial noise physical layer security; millimeter wave; sector secrecy guard zone; artificial noise

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Song, Y.; Yang, W.; Xiang, Z.; Liu, Y.; Cai, Y. Secure Transmission in mmWave Wiretap Channels: On Sector Guard Zone and Blockages. Entropy 2019, 21, 427.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top