Wyniki wyszukiwania dla: INDOOR AND OUTDOOR ENVIRONMENT

• Fading Characteristics for Dynamic Body-to-Body Channels in Indoor and Outdoor Environments

  Publikacja

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

  - Rok 2018

  This paper presents an analysis of the fading characteristics in dynamic body-to-body channels, based on measurements performed at 2.45 GHz in indoor and outdoor environments. The statistical analysis of the small- and large-scale fading shows that the Nakagami Distribution is the best model for the former and the Log-Normal one for the latter. An important influence of body shadowing...

• System Loss Model for Body-to-Body Networks in Indoor and Outdoor Environments

  Publikacja

  • S. J. Ambroziak
  • K. Cwalina
  • M. M. Ferreira
  • F. D. Cardoso
  • L. M. Correia

  - Rok 2023

  A system loss model for body-to-body networks in indoor and outdoor environments is proposed in this paper, based on measurements taken at 2.45 GHz. The influence of the type of environment, antenna visibility and user mobility on model parameters has been investigated. A significant impact of mutual antennas’ placement and their visibility is shown. The proposed model fits well to empirical data, with the average root mean square...

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• Position Estimation in Mixed Indoor-Outdoor Environment Using Signals of Opportunity and Deep Learning Approach

  Publikacja

  • S. Urwan
  • D. Wysocka
  • A. Pietrzak
  • K. Cwalina

  - International Journal of Electronics and Telecommunications - Rok 2022

  To improve the user's localization estimation in indoor and outdoor environment a novel radiolocalization system using deep learning dedicated to work both in indoor and outdoor environment is proposed. It is based on the radio signatures using radio signals of opportunity from LTE an WiFi networks. The measurements of channel state estimators from LTE network and from WiFi network are taken by using the developed application....

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• INDOOR AND BUILT ENVIRONMENT

  Czasopisma

  ISSN: 1420-326X , eISSN: 1423-0070

• Analysis of Position Calculating Methods in Indoor Environment

  Publikacja

  • A. Czapiewska

  - Rok 2013

  In the paper a modified gradient method has been proposed for position calculation on basis of distance measurement in indoor environment. It is shown that the well-known Chan method of position calculation is inefficient in indoor circumstances. Author presents Chan and modified gradient methods and achieved results for each one for real measurements.

• Currently Commercially Available Chemical Sensors Employed for Detection of Volatile Organic Compounds in Outdoor and Indoor Air

  Publikacja

  • B. Szulczyński
  • J. Gębicki

  - Environments - Rok 2017

  The paper presents principle of operation and design of the most popular chemical sensors for measurement of volatile organic compounds (VOCs) in outdoor and indoor air. It describes the sensors for evaluation of explosion risk including pellistors and IR-absorption sensors as well as the sensors for detection of toxic compounds such as electrochemical (amperometric), photoionization and semiconductor with solid electrolyte ones....

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• Comparison of new position estimation algorithm for indoor environment

  Publikacja

  • A. Czapiewska
  • J. Sadowski

  - Rok 2014

  In the paper a new position estimation algorithm based on distance measurements is presented. This algorithm is dedicated for indoor environments. In the paper the new algorithm is compared with Chan algorithm. For the comparison were used real measurements conducted inside a building.

• Occurrence of organic phosphates in particulate matter of the vehicle exhausts and outdoor environment – A case study

  Publikacja

  • M. Fabiańska
  • B. Kozielska
  • J. Konieczyński
  • P. Bielaczyc

  - ENVIRONMENTAL POLLUTION - Rok 2019

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• LSTM-based method for LOS/NLOS identification in an indoor environment

  Publikacja

  • A. Olejniczak
  • O. Błaszkiewicz
  • K. Cwalina
  • P. Rajchowski
  • J. Sadowski

  - Rok 2020

  Due to the multipath propagation, harsh indoor environment significantly impacts transmitted signals which may adversely affect the quality of the radiocommunication services, with focus on the real-time ones. This negative effect may be significantly reduced (e.g. resources management and allocation) or compensated (e.g. correction of position estimation in radiolocalisation) by the LOS/NLOS identification algorithm. This paper...

• Path Loss Analysis in Off-Body Channels in Indoor Environment

  Publikacja

  • S. J. Ambroziak
  • L. M. Correia
  • R. Katulski
  • M. Maćkowiak

  - Rok 2015

  This temporary document describes an analysis of path loss in off-body channels in an indoor environment. The influence of body orientation and on-body antenna placement on path loss in off-body communications as well as of different bodies has been investigated. Five static scenarios, six distances between body and antenna and eight body orientations were analysed; moreover, two dynamic scenarios were investigated. The smallest...