Results 221 to 230 of about 251,819 (258)

Path Loss Model for UAV-Assisted RFET

IEEE Communications Letters, 2018
In this letter, we develop channel models for unmanned aerial vehicle-aided air-to-ground (AtG) radio frequency energy transfer (RFET). AtG path loss plays a key role in RFET-based recharging of field nodes. Representative field environments consist of different types of built-up areas, namely, suburban, urban, dense urban, urban high-rise, and rural ...
Suraj Suman, Sidharth Kumar, Swades De
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Analysis of path loss models of 4G femtocells

2014 Eleventh International Conference on Wireless and Optical Communications Networks (WOCN), 2014
Mobile cellular communications revolutionized in communication system applications. The present mobile cellular communication networks normally often suffer from poor penetration and reception in certain areas, like indoor and apartments in turn decreasing quality of service.
C. Sree Vardhan, D. Venkat Ratnam, N. Bhagyasree, A. Hema Dattu   +3 more
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Characterization of path loss model for wireless communication channel modelling

Data Technologies and Applications, 2020
PurposeWireless communication channel provides a wide area of applications in the field of communication, distributed sensor network and so on. The prominence of the wireless communication channel is because of its robust nature and the sustainability for the precise ranging and the localization. The precision and accuracy of the wireless communication
Nandakishor Sirdeshpande, Vishwanath Udupi   +1 more
openaire   +1 more source

Millimeter waves channel measurements and path loss models

2012 IEEE International Conference on Communications (ICC), 2012
This paper describes a measurement campaign performed in a modern building at the University of L'Aquila, Italy. Measurements are taken for two large bands around 60 GHz, i.e. 54–59 and 61–66 GHz. The channel probe is an ultrawideband (UWB) PN-sequence signal having a bandwidth of 1.2 GHz, which is up-converted to the 60 GHz band and finely tuned in ...
Piersanti S, Annoni L. A, CASSIOLI, DAJANA   +2 more
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A new method for path-loss modeling

International Journal of Microwave and Wireless Technologies, 2019
AbstractIn this paper, a new path-loss model for electromagnetic wave in an indoor multipath environment is proposed based on matching coefficient, polarization matching factor, and normalized field intensity direction function. This model is called the Friis-extension (Friis-EXT) model, because it operates as the Friis model under certain conditions ...
Qiang Li, Hongxin Zhang, Yang Lu, Tianyi Zheng, Yinghua Lv   +4 more
openaire   +1 more source

Path-loss prediction model for microcells

IEEE Transactions on Vehicular Technology, 1999
Empirical path-loss formulas for microcells in low-rise and high-rise environments are established from measurements conducted in the San Francisco Bay area. Using the 1-km intercepts and slope indexes of the least square fit lines to the measurements at cellular and personal communication services (PCS) frequencies for three base station heights ...
D. Har, H.H. Xia, H.L. Bertoni
openaire   +1 more source

On Modeling Satellite-to-Ground Path-Loss in Urban Environments

IEEE Communications Letters, 2021
We are currently witnessing a leap in provisioning wireless networks using satellites, enabled by the recent reduction in the launching costs and the advent of the Internet-of-Things. Understanding the path-loss between satellites and ground users is vital for the proper planning and design of such networks.
Akram Al-Hourani, Ismail Güvenç
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Bounding the error of path loss models

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN), 2011
In this paper we analyze the efficacy of basic path loss models at predicting median path loss in urban environments. We attempt to bound the practical error of these models and look at how they may hinder practical wireless applications, and in particular dynamic spectrum access networks.
Caleb Phillips, Douglas Sicker, Dirk Grunwald   +2 more
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Path loss model for TETRA networks in metropolitan areas

Proceedings. ISCC 2004. Ninth International Symposium on Computers And Communications (IEEE Cat. No.04TH8769), 2004
This paper reports on measurements of the attenuation in the transmitted RF-power of a TETRA system, operating in the UIIF band. The measurements data are consistent with a log-distance path loss model for arbitrary T-R separation, with a path loss exponent n = 4.0 /spl plusmn/ 0.5.
N. E. Rittas, A. G. Asimakopoulos, D. G. Xenikos   +2 more
openaire   +1 more source

Indoor-to-outdoor path-loss models for femtocell predictions

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications, 2011
Two different indoor-to-outdoor path-loss models are proposed in this paper: an analytical formula derived for link-level and system-level simulations in heterogeneous radio networks, and a ray-tracing based model providing deterministic path-loss predictions, helpful for precise radio analysis or radio-planning tasks.
Yoann Corre, Julien Stephan, Yves Lostanlen   +2 more
openaire   +1 more source