Showing 581 - 600 results of 29,875 for search '"communications"', query time: 0.09s Refine Results
  1. 581

    On the Feasibility of Unlicensed Communications in the TV White Space: Field Measurements in the UHF Band by M. Fadda, V. Popescu, M. Murroni, P. Angueira, J. Morgade

    Published 2015-01-01
    “…The aim of this work is to provide a set of practical parameters upon which harmless unlicensed communication in the UHF TV white space is feasible. …”
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    Propagation and Wireless Channel Modeling Development on Wide-Sense Vehicle-to-X Communications by Wenyi Jiang, Ke Guan, Zhangdui Zhong, Bo Ai, Ruisi He, Binghao Chen, Yuanxuan Li, Jia You

    Published 2013-01-01
    “…In this regard, the concept of vehicle-to-X (V2X) communication has been introduced with the purpose of providing wireless communication technology in vehicular networks. …”
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  5. 585

    Low-Complexity Transmit Antenna Selection and Beamforming for Large-Scale MIMO Communications by Kun Qian, Wen-Qin Wang, Huaizong Shao

    Published 2014-01-01
    “…Transmit antenna selection plays an important role in large-scale multiple-input multiple-output (MIMO) communications, but optimal large-scale MIMO antenna selection is a technical challenge. …”
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    ICA based blind detection scheme in space-time block coding communications by XU Hong-ji 1, LIU Ju 1, GU Bo1, HU Hui-bo1

    Published 2007-01-01
    “…Space-time block coding(STBC) schemes are capable of improving system performance by using transmit diversity strategy and specific coding schemes.Nevertheless,they need precise channel state information(CSI) at the receiver end in order to achieve good detection performance,which is difficult to be guaranteed in some specific scenarios because of complicated communication conditions.Independent component analysis(ICA) technique is to separate a complex data set into a couple of independent sub-sets,which belongs to the family of blind source separation(BSS) technique.ICA techniques were exploited into the STBC communication systems,and they were used to detect the transmitted signals blindly,which need not the channel estimation.After analyzing the essential structure of STBC system,the specific model suitable to ICA is established,and several typical ICA algorithms are adopted to make a comparison.The robustness against channel estimation errors can be acquired by using the ICA based schemes.Simulation results demonstrate the validity of proposed approaches,and after the comparison among different ICA based detection schemes,the optimal one is found and the discussions are also given.…”
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    Accessibility information and rhetoric: an evaluation of the website communications of three New Zealand hotels by Eshwar Atul Shetty, Alison McIntosh

    Published 2024-09-01
    “…It also establishes a communication platform for wider social advocacy. This study sought to examine the website communications of three case study hotels known as being accessibility champions in New Zealand to evaluate how well they communicated information about inclusion and the accessibility of their hotel services, including in-hotel dining experiences, to customers with disabilities. …”
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  12. 592

    Secret sharing-based authentication and key agreement protocol for machine-type communications by Ana Paula G Lopes, Lucas O Hilgert, Paulo RL Gondim, Jaime Lloret

    Published 2019-04-01
    “…The comparisons regard security properties and computational and communication costs. The safety of the protocol was formally verified through simulations conducted by automated validation of internet security protocols and applications.…”
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    An Empirical Study on Ad Hoc Performance of DSRC and Wi-Fi Vehicular Communications by Seungbae Lee, Alvin Lim

    Published 2013-11-01
    “…Also, it identifies important effects of messages size, message frequency, weather condition, and vehicle mobility on vehicular communications. For example, rainy weather significantly diminishes the communication range and vehicle mobility causes temporal variations in communication throughput. …”
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    Planar Monopoles with Different Radiator Shapes for UWB Body-Centric Wireless Communications by Y. Y. Sun, S. W. Cheung, T. I. Yuk

    Published 2013-01-01
    “…A solid-body phantom mimicking human tissue is used for studies of these three monopoles for body-centric communications. Simulated and measured results of these monopoles on the phantom show that the horizontal elliptical monopole achieves the widest impedance bandwidths, highest average peak gain and efficiency, least path loss, best fidelity, and good radiation pattern, making it a good candidate for UWB body-centric wireless communications.…”
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