Dynamic Rotated Angular Beamforming Using Frequency Diverse Phased-Array for Secure MmWave Wireless Communications

被引:1
|
作者
Hong, Yuanquan [1 ,2 ,3 ]
Jing, Xiaojun [1 ,2 ]
He, Yuan [1 ,2 ]
Mu, Junsheng [1 ,2 ]
机构
[1] Beijing Univ Posts & Telecommun, Key Lab Trustworthy Distributed Comp & Serv BUPT, Minist Educ, Beijing 100876, Peoples R China
[2] Beijing Univ Posts & Telecommun, Sch Informat & Commun Engn, Beijing 100876, Peoples R China
[3] Shaoguan Univ, Sch Phys & Mech & Elect Engn, Shaoguan 512005, Peoples R China
基金
中国国家自然科学基金;
关键词
frequency diverse phased-array; dynamic rotated angular beamforming; frequency offset increment; physical layer security; secrecy rate; PHYSICAL-LAYER SECURITY; PROXIMAL LEGITIMATE USER; TRANSMISSION; EAVESDROPPER;
D O I
10.3390/electronics9010010
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, we propose a new secure millimeter-wave wireless communication architecture called dynamic rotated angular beamforming (DRAB), to address the physical layer security (PLS) challenge for aligned transmitter, eavesdropper and target receiver in the mainlobe path, where the conventional angular beamforming (CAB) fails to provide satisfactory PLS performance. The proposed DRAB consists of a conventional phased-array and a set of frequency offset modulator. A frequency offset increment (FOI) set is intentionally introduced to control the dynamic rotation of DRAB's mainlobe around the target user in the angle-range space. Thus, the average sidelobe of DRAB outside the target region is suppressed dramatically while the mainlobe inside the target region is a constant. We consider two cases of interests, i.e., with/without the location information of eavesdropping. For the known eavesdropping case, DRAB steer the zero gain sidelobes towards eavesdropper. The secrecy rate maximization problem is simplified to a form only depending on the FOI. As for the unknown eavesdropping case, we mainly depends on the beam rotating dynamically and randomly to hide the mainlobe path. Moreover, we propose inverted antenna subset technique to further randomize the sidelobes against sensitive eavesdropping. Numerical simulations demonstrate that the proposed DRAB can provide superior PLS performance over the existing CAB.
引用
收藏
页数:17
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