【摘 要】
:
This paper considers a secure multigroup multicast multiple-input single-output (MISO) com-munication system aided by an intelligent reflecting surface (IRS). S
【机 构】
:
School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing
论文部分内容阅读
This paper considers a secure multigroup multicast multiple-input single-output (MISO) com-munication system aided by an intelligent reflecting surface (IRS). Specifically, we aim to minimize the transmit power at Alice via jointly optimizing the transmit beamformer, artificial noise (AN) vector and phase shifts at the IRS subject to the secrecy rate constraints as well as the unit modulus constraints of IRS phase shifts. To tackle the optimization prob-lem, we first transform it into a semidefinite relax-ation (SDR) problem, and then alternately update the transmit beamformer and AN matrix as well as the phase shifts at the IRS. In order to reduce the high computational complexity, we further propose a low-complexity algorithm based on second-order cone programming (SOCP). We decouple the optimization problem into two sub-problems and optimize the trans-mit beamformer, AN vector and the phase shifts al-ternately by solving two corresponding SOCP sub-problem. Simulation results show that the proposed SDR and SOCP schemes require half or less transmit power than the scheme without IRS, which demon-strates the advantages of introducing IRS and the ef-fectiveness of the proposed methods.
其他文献
Unauthorized access to location informa-tion in location-based service is one of the most crit-ical security threats to mobile Internet. In order to solve the p
7年前,在央视春节晚会上,李琼作为唯一的独唱演员,倾情演唱湖北民歌《山路十八弯》。娇小的李琼轻松自如地“爬”上那令很多歌手都发憷的高音,如同一个天真烂漫的少女赤足漫步云间,高亢中不乏飘逸,优美中不乏力量,她因演唱此歌一夜成名而红遍大江南北……李琼走进山寨的最深处,用山歌讲述她年轻的音乐历程…… 不经风霜苦, 哪得梅花香 今年26岁的李琼出生在武汉的一个普通家庭。父亲李祖勋是湖北楚剧院
In this paper, a new communication model is built named grouping D2D (GD2D). Different from the traditional D2D coordination, we proposed GD2D communication in
This paper proposes a deep learning (DL) resource allocation framework to achieve the harmo-nious coexistence between the transceiver pairs (TPs) and the Wi-Fi
Intelligent reflecting surfaces (IRSs) con-stitute passive devices, which are capable of adjust-ing the phase shifts of their reflected signals, and hence they
In this study, we developed a system based on deep space–time neural networks for gesture recog-nition. When users change or the number of gesture categories i
In this paper, a fast orthogonal matching pursuit (OMP) algorithm based on optimized iterative process is proposed for sparse time-varying underwa-ter acoustic