With the rapid growth of indoor wireless communication systems, the need to accurately model radio wave propagation inside the building environments has increased. Many site-specific methods have been proposed for modeling indoor radio channels. Among these methods, the ray tracing algorithm and the finite-difference time domain (FDTD) method are the most popular ones. The ray tracing approach ...

Radio propagation measurement is carried out in Jakarta, Indonesia, in anticipation of digital TV implementation in the country. Measurements are made using a fixed, portable receiver outdoors and indoors. Spatial variations of the received power, both large-scale and small-scale, are measured in these locations. Results show that the largescale path loss variation characteristics, as described...

This paper provides an extension of pathloss analysis in Urban, Rural and Semi-Urban environments in Oman. A new software package has been developed that incorporates modified propagation models and the proposition of radio frequency (RF) network design output for proper and efficient planning to be used by RF engineers for pathloss studies. The root-mean square error (RMSE) was calculated betw...

Urban canyon environments represent a significant challenge to wireless communications, a satisfactory solution for which remains to be proven. We present RF Propagation Environment Awareness (RPEA), utilising ‘smart’ ad hoc, or self-forming and self-healing networks that are capable of storing and exploiting local propagation geometry information. An empirical radio propagation environment mod...

In the field of Intelligent Transport Systems (ITS), inter-vehicle communication systems are actively researched for the purpose of decreasing the number of traffic accidents. In particular, reduced visibility due to buildings and vehicles is a significant cause of right-turn accidents and head-on accidents. The Inter-Vehicle Communication system enables the position of a vehicle to be transmit...

This paper presents a study about the Longley-Rice model and its applicability in urban settings located in tropical areas. For this, the model has been modeled computationally for MatLab platform. The LRM (Longley-Rice Modified) algorithm has been calibrated and validated with reference values for analysis of the radio signal attenuation measured in Belo Horizonte. These data are evaluated for...

This paper deals with simulations of a radio interface of third generation (3G) mobile systems operating in the WCDMA FDD mode including propagation predictions in macro and microcells. In the radio network planning of 3G mobile systems, the quality of coverage and the system capacity present a common problem. Both macro and microcellular concepts are very important for implementing wireless co...

The accurate planning of microcellular mobile radio networks requires a thorough understanding of the mechanisms that govern radio wave propagation in urban environments. Combined measurements of time delays and angles-of-arrival (AoA’s), both in azimuth and elevation, of individual multipath contributions are expected to be very helpful in the validation and improvement of existing ray-tracing...

In cellular mobile radio systems, the directional inhomogeneity of the mobile radio channel can be exploited by smart antennas to increase the spectral efficiency. In this paper, a novel smart antenna concept applying receiver antenna diversity at the uplink receiver is investigated for a time-slotted code-division multiple-access (CDMA) mobile radio air interface termed time-division CDMA (TD-...

Faria Junior , Jason Paulo Tavares; Lima Siqueira , Gláucio (Advisor).Radio signal predictions for indoor Locations With Transmitter in microcellular environment . Rio de Janeiro, 2003. 100p. Doctor T. Departamento de Engenharia Elétrica, Pontifícia Universidade Católica do Rio de Janeiro. In this work, a software tool has been developed that provides accurate, sitespecific radio signal predict...