Secure Communications in Millimeter Wave Ad Hoc Networks

Journal article


Zhu, Yongxu, Wang, Lifeng, Wong, Kai-Kit and Heath, Robert W (2017). Secure Communications in Millimeter Wave Ad Hoc Networks. IEEE Transactions on Wireless Communications. 16 (5), pp. 3205-3217. https://doi.org/10.1109/twc.2017.2676087
AuthorsZhu, Yongxu, Wang, Lifeng, Wong, Kai-Kit and Heath, Robert W
Abstract

Wireless networks with directional antennas, like
millimeter wave (mmWave) networks, have enhanced security.
For a large-scale mmWave ad hoc network in which eavesdroppers are randomly located, however, eavesdroppers can still intercept the confidential messages, since they may reside in the signal beam. This paper explores the potential of physical layer security in mmWave ad hoc networks. Specifically, we characterize the impact of mmWave channel characteristics, random blockages, and antenna gains on the secrecy performance. For the special case of uniform linear array (ULA), a tractable approach is proposed to evaluate the average achievable secrecy rate. We also characterize the impact of artificial noise in such networks. Our results reveal that in the low transmit power regime, the use of low mmWave frequency achieves better secrecy performance, and when increasing transmit power, a transition from low mmWave frequency to high mmWave frequency is demanded for obtaining a higher secrecy rate. More antennas at the transmitting nodes are needed to decrease the antenna gain obtained by the eavesdroppers when using ULA. Eavesdroppers can intercept more information by using a wide beam pattern. Furthermore, the use of artificial noise may be ineffective forenhancing the secrecy rate.

KeywordsAd hoc; millimeter wave; beamforming; uniform linear array; average achievable secrecy rate
Year2017
JournalIEEE Transactions on Wireless Communications
Journal citation16 (5), pp. 3205-3217
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISSN1536-1276
Digital Object Identifier (DOI)https://doi.org/10.1109/twc.2017.2676087
Publication dates
PrintMay 2017
Publication process dates
AcceptedApr 2017
Deposited19 Feb 2020
Accepted author manuscript
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Open
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