Results 21 to 30 of about 404,248 (295)
Interference and Deployment Issues for Cognitive Radio Systems in Shadowing Environments [PDF]
, 2009 In this paper we describe a model for calculating the aggregate interference encountered by primary receivers in the presence of randomly placed cognitive radios (CRs). We show that incorporating the impact of distance attenuation and lognormal fading on
Dmochowski, Pawel A. +3 more
core +4 more sources
IEEE Access, 2018 If the construction and maintenance of Wi-Fi radio maps (WRMs) were fully automated, the implementation of a global-scale Wi-Fi indoor positioning system would be possible.
Suk-Hoon Jung, Dongsoo Han
doaj +1 more source
WSN and RFID integration to support intelligent monitoring in smart buildings using hybrid intelligent decision support systems [PDF]
, 2015 The real time monitoring of environment context aware activities is becoming a standard in the service delivery in a wide range of domains (child and elderly care and supervision, logistics, circulation, and other).
Abbod, M, Alshahrany, F, Moualek, I
core +1 more source
Mapping and recognition of radio frequency clutter in various environments in Australia [PDF]
, 2010 Radio frequency spectrum mapping allows determining the radio frequency signatures prevalent within an environment. We address the primary frequency bands used for cellular, wireless Local Area Network (LAN), Universal Mobile Telecommunications System ...
Aboura, K +3 more
core +1 more source
Sensors, 2020 Indoor WLAN fingerprint localization systems have been widely applied due to the simplicity of implementation on various mobile devices, including smartphones.
Yepeng Ni +3 more
doaj +1 more source
Control of Electromagnetic Radiation on Coexisting Smart Radio Environment
IEEE Open Journal of the Communications Society, 2022 Efficient spectrum utilization is always the fundamental challenge of mobile communication technology toward 6G. Instead of conventional spectral efficiency in bps/Hz, geographical region shall be brought into consideration in bps/Hz/unit-area, which ...
Mehmet Mert Sahin +2 more
doaj +1 more source
A radiosity-based method to avoid calibration for Indoor Positioning Systems [PDF]
, 2018 Due to the widespread use of mobile devices, services based on the users current indoor location are growing in significance. Such services are developed in the Machine Learning and Experst Systems realm, and ranges from guidance for blind people to ...
Belmonte-Fernández, Óscar +4 more
core +2 more sources
Towards low-delay and high-throughput cognitive radio vehicular networks
ICT Express, 2017 Cognitive Radio Vehicular Ad-hoc Networks (CR-VANETs) exploit cognitive radios to allow vehicles to access the unused channels in their radio environment.
Nada Elgaml +2 more
doaj +1 more source
Selective AP-sequence Based Indoor Localization without Site Survey [PDF]
, 2016 In this paper, we propose an indoor localization system employing ordered sequence of access points (APs) based on received signal strength (RSS). Unlike existing indoor localization systems, our approach does not require any time-consuming and laborious
Guo, Jindong +6 more
core +1 more source
Performance of Cognitive Radio Systems with Imperfect Radio Environment Map Information [PDF]
2009 Australian Communications Theory Workshop, 2009 In this paper we describe the effect of imperfections in the radio environment map (REM) information on the performance of cognitive radio (CR) systems. Via simulations we explore the relationship between the required precision of the REM and various channel/system properties. For example, the degree of spatial correlation in the shadow fading is a key
Hanif, Muhammad Fainan +2 more
openaire +2 more sources