Secure beamforming and power‐efficient artificial‐noise optimization for multibeam directional modulation. Issue 1 (21st October 2020)

• Record Type: Journal Article
• Authors: Zhou, Xuetao; Wang, Hao; Cheng, Qian; Wang, Shilian; Zheng, Linhua
• Is Part Of: Transactions on emerging telecommunications technologies. Volume 32:Issue 1(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-10-21
• Subjects: Telecommunication -- Periodicals; 384.05
• DOI: 10.1002/ett.4156
• Languages: English
• ISSNs: 2161-5748

Abstract

Abstract: 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. Abstract : An anti‐eavesdropping zero‐forcing plus power‐efficient artificial‐noise optimization method for multibeam directional modulation synthesis is proposed. It aims to prevent known and unknown eavesdroppers intercepting useful signals and achieve a narrower BER main beamwidth under a limited artificial‐noise power consumption. Simulation results show that the proposed method outperforms traditional methods in power efficiency, secrecy rate and BER performance.