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Secure Transmissions in Millimeter Wave Systems

Ju, Ying ; Wang, Hui-Ming ; Zheng, Tong-Xing ; Yin, Qinye

IEEE transactions on communications, 2017-05, Vol.65 (5), p.2114-2127 [Peer Reviewed Journal]

New York: IEEE

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Title:
Secure Transmissions in Millimeter Wave Systems
Author: Ju, Ying ; Wang, Hui-Ming ; Zheng, Tong-Xing ; Yin, Qinye
Subjects: Array signal processing ; artificial noise ; Beamforming ; Channel models ; Communication channels ; Communications systems ; Communications traffic ; millimeter wave ; Millimeter wave communication ; Millimeter wave propagation ; multipath ; Physical layer security ; secrecy outage ; secrecy throughput ; System effectiveness ; Throughput ; Traffic flow ; Traffic information ; Traffic models ; Wave propagation ; Wideband communications ; Wireless communication ; Wireless communications
Is Part Of: IEEE transactions on communications, 2017-05, Vol.65 (5), p.2114-2127
Description: Exploiting millimeter wave is an effective way to meet the data traffic demand in the 5G wireless communication system. In this paper, we study secure transmissions under slow fading channels with multipath propagation in millimeter wave systems. Concerning the new propagation characteristics of millimeter wave, we investigate three transmission schemes, namely, maximum ratio transmitting (MRT) beamforming, artificial noise (AN) beamforming, and partial MRT (PMRT) beamforming. We evaluate the secrecy performance by analyzing both the secrecy outage probability (SOP) and the secrecy throughput for each scheme. Particularly, for the AN scheme, we derive a closed-form expression for the optimal power allocation ratio of the information signal power to the total transmit power that minimizes the SOP, as well as obtain an explicit solution on the optimal transmission parameters that maximize the secrecy throughput. By comparing the secrecy performances achieved by different strategies, we demonstrate that the secrecy performance of the millimeter wave system is significantly influenced by the relationship between the legitimate user's and the eavesdropper's spatially resolvable paths, which is different from the wireless systems with statistically independent channel models. In the absence of the common path between the legitimate user and the eavesdropper, MRT beamforming is the best scheme. In the presence of common paths, AN beamforming and PMRT beamforming show their respective superiorities depending on the transmit power and the number of common paths. Numerical results are provided to verify our theoretical analysis.
Publisher: New York: IEEE
Language: English

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Secure Transmissions in Millimeter Wave Systems

Ju, Ying ; Wang, Hui-Ming ; Zheng, Tong-Xing ; Yin, Qinye

New York: IEEE

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