Showing 821 - 840 results of 29,875 for search '"communications"', query time: 0.08s Refine Results
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    Design, Simulation, and Optimization of an Irregularly Shaped Microstrip Patch Antenna for Air-to-Ground Communications by L. A. R. Ramirez, J. C. A. Santos

    Published 2017-01-01
    “…In this study an irregularly shaped microstrip patch antenna was designed, simulated, and optimized for air-to-ground communication (ATG) applications. The process started with the design of a rectangular patch antenna with the traditional transmission line and cavity methods, followed by a simulation with the finite-difference time-domain method (FDTD) in conjunction with a genetic algorithm (GA). …”
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    Endogenous security in the physical layer of wireless communications: key technologies, advantages and future challenges by LU Xinjin, SHI Yuxin, LEI Jing, YANG Zhifei, YANG Xiaojun

    Published 2024-10-01
    “…The rapid development of wireless communications has put forward higher requirements for the design of security architectures for future communications. …”
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  8. 828

    Étirer les frontières des études sur les communications et les médias by Nico Carpentier, David Grondin

    Published 2018-09-01
    “…Chercheur prolifique dans le champ des études en communication et des études médiatiques, Nico Carpentier a écrit de nombreux travaux portant sur la participation, les médias, les technologies médiatiques, la société civile, l’analyse de discours, le pouvoir et les droits de la communication, en prenant toujours bien soin d’ancrer théoriquement ses réflexions. …”
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  9. 829

    Angular Circle Array Multiple Input Multiple Output Underwater Optical Wireless Communications by Zhuoqi Chen, Yuhe Liu, Xiang Yi, Ruiqin Zhao

    Published 2024-12-01
    Subjects: “…underwater wireless optical communication…”
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    Channel estimation for hybrid intelligent reflecting surface structure assisted mmWave communications by Youhua FU, Dong CHEN

    Published 2021-10-01
    “…When adding intelligent reflecting surface (IRS) for assist communication in millimeter wave communication, the system becomes complicated and difficult to obtain channel state information (CSI).To solve these challenges, a hybrid intelligent reflecting surface structure was adopted, that is, the IRS was composed of a large number of passive elements and the limited radio frequency (RF) chains, where the limited RF chains were used to estimate the channel between the base station/terminal and the IRS.Based on the structure, a channel estimation scheme was proposed, which was based on the limited RF chains.First, an improved multiple signal classification algorithm was used to estimate the departure angle and arrival angle of the channel at the same time, and then a complex parallel deep neural network was proposed to estimate the path gain.Through simulation and comparison between the proposed scheme and other methods, the superiority of the proposed scheme is proved.…”
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  11. 831

    A Review of Synthesis Techniques for Phased Antenna Arrays in Wireless Communications and Remote Sensing by Stanislav Ogurtsov, Diego Caratelli, Zhe Song

    Published 2021-01-01
    “…Electronically controlled antenna arrays, such as reconfigurable and phased antenna arrays, are essential elements of high-frequency 5G communication hardware. These antenna arrays are aimed at delivering specified communication scenarios and channel characteristics in the mm-wave parts of the 5G spectrum. …”
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    A Survey of Secure Communications for Satellite Internet Based on Cryptography and Physical Layer Security by Yu Zhang, Shuangrui Zhao, Ji He, Yuanyu Zhang, Yulong Shen, Xiaohong Jiang

    Published 2023-01-01
    “…This paper provides an in-depth survey of secure communications for various satellite internet scenarios. …”
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    OCC-ID: New Broadcasting Service-Based Cloud Model and Image Sensor Communications by Thithanhnhan Le, Nam-Tuan Le, Yeong Min Jang

    Published 2016-06-01
    “…In recent decades, the main data traffic of mobile communication is based on the RF technology. Even though the efficiency from optimization for utilization or reuse is applied, there is a limitation of increased traffic demand of RF communication. …”
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    SER analysis of cooperative M2M communications assisted by multiple AF relays by Nan ZHANG, Feng-kui GONG, Jian-hua GE

    Published 2012-05-01
    Subjects: “…mobile-to-mobile communications…”
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    Chaotic Stream Cipher-Based Secure Data Communications over Intelligent Transportation Network by Wei Zhang, Shanyu Tang, Liping Zhang, Zhao Ma, Jun Song

    Published 2015-01-01
    “…To address the above security problems, we proposed a chaotic stream cipher-based cryptographic scheme to realise secure data communications over wireless sensor network (WSN), which is a part of ITS. …”
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