Wyniki wyszukiwania dla: UNMANNED COMMUNICATIONS

• Radio Channel Measurements in Body-to-Body Communications in Different Scenarios

  Publikacja

  • S. J. Ambroziak
  • L. M. Correia
  • K. Turbić

  - Rok 2016

  This paper presents body-to-body radio channel measurements at the 2.45 GHz band, for different body motion scenarios and on-body antenna placements, and both indoor and outdoor environments. Measurement equipment, investigated scenarios and considered environments are described, an initial analysis of results being presented. The mean path loss and the standard deviation depend on the mutual location of transmitting and receiving...

• Compact Dual-Polarized Corrugated Horn Antenna for Satellite Communications

  Publikacja

  • M. Saeed
  • S. Kozieł
  • L. Leifsson

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Rok 2020

  In this paper, a structure and design procedure of a novel compact dual-polarized corrugated horn antenna with high gain and a stable phase center for satellite communication is presented. The antenna incorporates an Ortho-Mode Transducer (OMT), a mode converter, and a corrugated structure. The compact OMT section is designed to be fed by standard WR-75 waveguides. The proposed compact design utilizes only ten corrugated slots...

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• Non-Satellite Broadband Maritime Communications for e-Navigation Services

  Publikacja

  • M. Hoeft
  • K. Gierłowski
  • J. Rak
  • J. Woźniak
  • K. Nowicki

  - IEEE Access - Rok 2021

  The development of broadband network access technologies available to users on land has triggered a rapid expansion of a diverse range of services provided by terrestrial networks. However, due to limitations of digital communication technologies in the off-shore area, the maritime ICT systems evolution so far has not followed that trend. Despite the e-navigation initiative defining the set of Maritime Services, the progress in...

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• COMPUTER COMMUNICATIONS

  Czasopisma

  ISSN: 0140-3664 , eISSN: 1873-703X

• COMMUNICATIONS IN ALGEBRA

  Czasopisma

  ISSN: 0092-7872 , eISSN: 1532-4125

• COMMUNICATIONS NEWS

  Czasopisma

  ISSN: 0010-3632

• China Communications

  Czasopisma

  ISSN: 1673-5447

• COMMUNICATIONS OF THE ACM

  Czasopisma

  ISSN: 0001-0782 , eISSN: 1557-7317

• ENRICHING COMMUNICATIONS

  Czasopisma

  ISSN: 1960-7652

• Communications Physics

  Czasopisma

  ISSN: 2399-3650

• Communications Chemistry

  Czasopisma

  ISSN: 2399-3669

• Cancer Communications

  Czasopisma

  ISSN: 2523-3548

• MRS Communications

  Czasopisma

  ISSN: 2159-6859 , eISSN: 2159-6867

• Vehicular Communications

  Czasopisma

  ISSN: 2214-2096

• Hepatology Communications

  Czasopisma

  ISSN: 2471-254X

• Organic Communications

  Czasopisma

  ISSN: 1307-6175

• IET Communications

  Czasopisma

  ISSN: 1751-8628 , eISSN: 1751-8636

• Communications in Mathematics

  Czasopisma

  ISSN: 1804-1388

• Journal of Communications

  Czasopisma

  ISSN: 1796-2021

• Communications Law

  Czasopisma

  ISSN: 1746-7616

• Palgrave Communications

  Czasopisma

  ISSN: 2055-1045

• Brain Communications

  Czasopisma

  eISSN: 2632-1297

• Communications Materials

  Czasopisma

  eISSN: 2662-4443

• Biological Communications

  Czasopisma

  ISSN: 2542-2154 , eISSN: 2587-5779

• Mathematical Communications

  Czasopisma

  ISSN: 1331-0623

• Plant Communications

  Czasopisma

  eISSN: 2590-3462

• Communications Medicine

  Czasopisma

  ISSN: 2730-664X

• OPTICS COMMUNICATIONS

  Czasopisma

  ISSN: 0030-4018 , eISSN: 1873-0310

• OXIDATION COMMUNICATIONS

  Czasopisma

  ISSN: 0209-4541

• Communications Biology

  Czasopisma

  eISSN: 2399-3642

• Corrosion Communications

  Czasopisma

  eISSN: 2667-2669

• SPACE COMMUNICATIONS

  Czasopisma

  ISSN: 0924-8625

• Low-Cost Underwater Communication System: A Pilot Study

  Publikacja

  • B. Szlachetko

  - Applied Sciences-Basel - Rok 2022

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• Adaptation of telecommunication modem techniques for underwater communication systems.

  Publikacja

  • I. Budzińska
  • H. Lasota
  • R. Mazurek

  - HYDROACOUSTICS - Rok 2003

  ...

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• The method of measuring the energy pass-band of a communication receiver

  Publikacja

  • K. Korczak
  • B. Pałczyńska
  • L. Spiralski

  - Rok 2005

  Przedstawiono metodę wyznaczania energetycznego pasma odbiornika radiokomunikacyjnego na podstawie charakterystyki gęstości widmowej mocy szumów własnych na wyjściu odbiornika. Podano numeryczny estymator tego pasma. Wyprowadzono zależności na złożoną niepewność standardową wyznaczania szerokości pasma energetycznego odbiornika.

• Intelligent platform for communication, control and management of modern enterprises

  Publikacja

  • Z. Kowalczuk
  • J. Wszołek

  - FOUNDATIONS OF CONTROL AND MANAGEMENT SCIENCES - Rok 2008

  W artykule przedstawiono praktyczną metodę tworzenia interaktywnej i inteligentnej platformy do kontroli i zarządzania nowoczesną firmą z zastosowaniem sieci telekomunikacyjnej. Omówiono sposób realizacji poszczególnych etapów projektowych, dokonując przy tym wyboru konkretnych technologii informatycznych, takich jak relacyjne bazy danych, technologie bezprzewodowe oraz czynników bezpieczeństwa.

• Estimation of Coherence Bandwidth for Underwater Acoustic Communication Channel

  Publikacja

  • I. Kochańska
  • J. Schmidt

  - Rok 2018

  A shallow underwater acoustic communication channel is characterized by strong multipath propagation. The signal reaching the receiver consists of a direct waveform and a number of its delayed and suppressed replica. A significant time dispersion of the transmitted signal and selective fading of its spectrum are observed. Coherence bandwidth defines maximal bandwidth, wherein the channel amplitude characteristic remains constant...

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• Decoherence-free communication over multiaccess quantum channels

  Publikacja

  • M. Demianowicz

  - OPEN SYSTEMS & INFORMATION DYNAMICS - Rok 2013

  In this paper we consider decoherence-free communication over multiple access and k-user quantum channels. First, we concentrate on a hermitian unitary noise model U for a two-access bi-unitary channel and show that in this case a decoherence-free code exists if the space of Schmidt matrices of an eigensubspace of U exhibits certain properties of decomposability. Then, we show that our technique is also applicable for generic random unitary...

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• The effect of social media communication on consumer perceptions of brands

  Publikacja

  • B. Schivinski
  • D. Dąbrowski

  - Journal of Marketing Communications - Rok 2016

  Researchers and brand managers have limited understanding of the effects social media communication has on how consumers perceive brands. We investigated 504 Facebook users in order to observe the impact of firm-created and user-generated (UG) social media communication on brand equity (BE), brand attitude (BA) and purchase intention (PI) by using a standardized online survey throughout Poland. To test the conceptual model, we...

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• Energy Versus Throughput Optimisation for Machine-to-Machine Communication

  Publikacja

  • E. Fitzgerald
  • M. Pióro
  • A. Tomaszewski

  - SENSORS - Rok 2020

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• Toward Fast Calculation of Communication Paths for Resilient Routing

  Publikacja

  • K. Myslitski
  • J. Rak
  • Ł. Kuszner

  - NETWORKS - Rok 2017

  Utilization of alternate communication paths is a common technique to provide protection of transmission against failures of network nodes/links. However, a noticeable delay is encountered when calculating the relevant sets of disjoint paths using the available algorithms (e.g., using Bhandari’s approach). This, in turn, may have a serious impact on the ability of a network to serve dynamic demands...

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• Application of wireless communication to small WECS with induction generator

  Publikacja

  • M. Adamowicz
  • R. Strzelecki
  • Z. Krzemiński
  • J. Szewczyk
  • Ł. Lademan

  - Rok 2010

  Wind energy conversion systems (WECS) seem to be self-evident elements of the future smart grids. Among many generator types the squirrel cage induction generator (SCIG) characterizes robustness and low cost. A full-scale power converter can perform smooth grid connection over wide speed range of multiple-stage geared SCIG. Increasing number of sensors can improve the WECS control and diagnostics but increasing number of thin wires...

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• Disaster-resilient communication networks: Principles and best practices

  Publikacja

  • A. Mauthe
  • D. Hutchison
  • E. Cetinkaya
  • I. Ganchev
  • J. Rak
  • J. P. Sterbenz
  • M. Gunkelk
  • P. Smith
  • T. Gomes

  - Rok 2016

  Communication network failures that are caused by disasters, such as hurricanes, arthquakes and cyber-attacks, can have significant economic and societal impact. To address this problem, the research community has been investigating approaches to network resilience for several years. However, aside from well-established techniques, many of these solutions have not found their way into operational...

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• Future research directions in design of reliable communication systems

  Publikacja

  • J. Rak
  • M. Pickavet
  • K. S. Trivedi
  • J. A. Lopez
  • A. M. C. A. Koster
  • J. P. Sterbenz
  • E. Çetinkaya
  • T. Gomes
  • M. Gunkel
  • K. Walkowiak
  • D. Staessens

  - TELECOMMUNICATION SYSTEMS - Rok 2015

  In this position paper on reliable networks, we discuss new trends in the design of reliable communication systems. We focus on a wide range of research directions including protection against software failures as well as failures of communication systems equipment. In particular, we outline future research trends in software failure mitigation, reliability of wireless communications, robust optimization and network design, multilevel...

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• Analytical method of modelling the geometric system of communication route

  Publikacja

  • W. Koc

  - MATHEMATICAL PROBLEMS IN ENGINEERING - Rok 2014

  The paper presents a new analytical approach to modelling the curvature of a communication route by making use of differential equations. The method makes it possible to identify both linear and nonlinear curvature. It enables us to join curves of the same or opposite signs of curvature. Solutions of problems for linear change of curvature and selected variants of nonlinear curvature in polynomial and trigonometric form were analyzed....

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• Reliable underwater communication system for shallow coastal waters

  Publikacja

  • J. Schmidt

  - HYDROACOUSTICS - Rok 2014

  This paper presents a reliable and robust low data rate spread spectrum approach which is implemented in the acoustic underwater communication system for shallow coastal waters. It shows operation assumptions of spread spectrum techniques based on the wellknown Shannon equation. It describes two methods of spread spectrum: frequency hopping spread spectrum and direct sequence spread spectrum; their block diagram and their characteristics...

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• The impact of brand communication on brand equity through Facebook

  Publikacja

  • B. Schivinski
  • D. Dąbrowski

  - Journal of Research in Interactive Marketing - Rok 2015

  Purpose The purpose of this study is to fill the gap in the discussion of the ways in which firm-created and user-generated social media brand communication impacts consumer-based brand equity metrics through Facebook. Design/methodology/approach We evaluated 302 data sets that were generated through a standardized online-survey to investigate the impact of firm-created and user-generated social media brand communication on brand...

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• Quality of Satellite Communication in Selected Mobile Android Smartphones

  Publikacja

  • P. Falkowski-Gilski

  - Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska - Rok 2021

  Today, thanks to mobile devices, satellite communication is available to anyone and everywhere. Gaining information on one’s position using GNSS (Global Navigation Satellite Systems), particularly in unknown urban environments, had become an everyday activity. With the widespread of mobile devices, particularly smartphones, each person can obtain information considering his or her location anytime and everywhere. This paper is...

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• Fundamentals of Communication Networks Resilience to Disasters and Massive Disruptions

  Publikacja

  • J. Rak
  • D. Hutchison
  • J. Tapolcai
  • R. Bruzgiene
  • M. Tornatore
  • C. Mas-Machuca
  • M. Furdek
  • P. Smith

  - Rok 2020

  Communication networks are exposed to a variety of massive failure events following from activities of nature, weather-induced disruptions, technology-implied problems, and malicious human activities. In this chapter, we first highlight the characteristics of these scenarios and discuss example failure events reported during the last three decades. Next, we explain the concept of network resilience and present an overview of major...

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• Decision making techniques for electronic communication: an example for Turkey

  Publikacja

  • S. Erpolat Tasabat
  • O. Aydin

  - Rok 2017

  Communication is the way for people exchanging information with each other by using various tools. Electronic communication or Ecommunication is the process of sending, receiving and processing information or messages electronically. Electronic communication that is closely related to the development levels of countries, has made considerable progress especially in terms technology, innovation and entrepreneur. In this study, it...

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