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Secure beamforming and power‐efficient artificial‐noise optimization for multibeam directional modulation
Author(s) -
Zhou Xuetao,
Wang Hao,
Cheng Qian,
Wang Shilian,
Zheng Linhua
Publication year - 2021
Publication title -
transactions on emerging telecommunications technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 47
ISSN - 2161-3915
DOI - 10.1002/ett.4156
Subject(s) - beamforming , artificial noise , beamwidth , computer science , eavesdropping , modulation (music) , power (physics) , orthogonality , noise (video) , electronic engineering , bit error rate , distortion (music) , control theory (sociology) , engineering , telecommunications , amplifier , antenna (radio) , acoustics , mathematics , physical layer , computer network , wireless , artificial intelligence , physics , decoding methods , image (mathematics) , quantum mechanics , geometry , bandwidth (computing) , control (management)
In this article, an anti‐eavesdropping zero‐forcing plus power‐efficient artificial‐noise optimization method for multibeam directional modulation (DM) synthesis is proposed. It aims to prevent known and unknown eavesdroppers intercepting useful signals as far as possible and achieve a narrower bit error rate (BER) main beamwidth under the premise of limited artificial‐noise (AN) power consumption. Beam pattern nulls are generated in known eavesdroppers directions by utilizing the orthogonality of zero‐forcing beamforming. Low‐sidelobe beamforming is also introduced to DM for the first time to suppress unknown eavesdroppers outside main lobes. The distribution of AN power in all directions is optimized by minimizing the AN transmit power subject to a series of secrecy rate (SR) constraints. Simulation results show that the proposed method outperforms the state‐of‐the‐art DM synthesis methods with regard to power efficiency, SR and BER performance.