In this paper, a dual band planar inverted F antenna (PIFA) has been investigated for cooperative onand off-body communications. Free space and on-body performance parameters like return loss, bandwidth, radiation pattern and efficiency of this antenna are shown and investigated. The onand off-body radio propagation channel performance at 2.45 GHz and 1.9 GHz have been investigated, respectivel...

Indoor positioning remains an open problem, because it is difficult to achieve satisfactory accuracy within an indoor environment using current radio-based localization technology. In this study, we investigate the use of Indoor Messaging System (IMES) radio for high-accuracy indoor positioning. A hybrid positioning method combining IMES radio strength information and pedestrian dead reckoning ...

Multipath propagation in the lower troposphere plays a very important role in forming the structure of radio signals used for radio occultations. Processing radio occultation data in multipath regions requires the solution of the problem of the reconstruction of the ray structure of a wave eld. Two methods were formerly suggested for processing multipath data: back-propagation and radio-optic (...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Vasilii Semkin Name of the doctoral dissertation Reconfigurable antennas and radio wave propagation at millimeter-wave frequencies Publisher School of Electrical Engineering Unit Department of Radio Science and Engineering Series Aalto University publication series DOCTORAL DISSERTATIONS 151/2016 Field of research Radio Engine...

Theodore S. Rappaport Mobile and Portable Radio Research Group Bradley Department of Electrical Engineering Virginia Polytechnic Institute and State University Blacksburg, VA 24061-0111 The Mobile and Portable Radio Research Group (MPRG) is a relatively new research group at Virginia Tech. Founded in the Spring of 1990, it is conducting basic and applied research in the areas of radio propagati...

At present, 5G base stations are densely distributed in major cities based on improving user concentrations and the large demand for services urban hotspot areas. Moreover, communication requires more accurate propagation loss (PL) monitoring. Low-build areas, such as suburbs rural prone to forming relatively stable tropospheric ducts, which can bend signal surface duct-trapping layer multiple ...

Wireless communication networks offer subscribers the possibilities of free mobility and access to information anywhere at any time. Therefore, electromagnetic coverage calculations are important for wireless mobile communication systems, especially in Wireless Local Area Networks (WLANs). Before any propagation computation is performed, modeling of indoor radio wave propagation needs accurate ...

Papers on the Next Step of UNIVERGE : Toward the Future RADIOSCAPE — A Radio Propagation Analyzing Service for Effective Coverage Area Design — By Takashi ONO,* Yoshinori WATANABE,* Hiroto SUGAHARA,* Kazuhiro OKANOUE* and Shuntaro YAMAZAKI* *Internet Systems Research Laboratories The basic concept of the radio propagation simulator “RADIOSCAPE” is reported. The simulator is helpful for wireless...

The radio holography methodology may be applied in the scientific programs for future small satellite that will use radio signals emitted by radio navigation, radio communication satellites for precise measuring effects of radio waves propagation at low elevation angles and for global monitoring of radio communication channels passed through the atmosphere and ionosphere. Another task consists ...

Currently, use of geo-location databases is the preferred method for detecting TV white spaces by white space devices in the US. The approach protects TV transmitters and receivers from interference sufficiently by keeping a record of the TV transmitters’ information, and relying on propagation models to determine the protection area of the TV transmitters. Thus accurate radio propagation by th...