This paper discusses the application of GRASS iil the area of mobile and portable radio communications. The growing interest in wireless personal communications has fueled efforts to produce systems with better performance and increased capacity. A brief view of mobile communications is presented along with the motivation for this research. The role of GRASS in radio propagation prediction is d...

Providing high data rates and wide bandwidth applications are the most important challenges that mobile systems and radio networks are trying to accomplish. Radio over Fiber (RoF) system is a promoting research field since it benefits of Passive Optical Network (PON) advantages and unlicensed large bands in 60 GHz millimeter band (57-64GHz). In this study, we consider a complete downlink RoF sy...

This paper presents a microscopic analysis of MANET routing protocols’ behavior in realistic environments. The motivation of this study was due to our previous testbed experimentations where we found that AODV and DSDV’s performance did not match simulation results, primarily due to the use of a simple radio propagation model that did not take into account transient links caused by small-scale ...

Due to the metallic structure of decks, bulkheads and watertight (WT) doors, wireless communications are a serious challenge in the particular environment of ships. In order to deploy reliable shipboard wireless networks, wireless devices (access points, routers, sensor nodes, etc) must be located at strategic locations ensuring full radio coverage and network connectivity. Strategic locations ...

nowdays, it is not possible administration a city without enjoyment of knowledge urban strategic development of cities planner, designer, and expert affair as in study more the dimension divers regional urban and analysis fund divers urban planning. urban aim to showing is to set up modern solutions. lareg city has faced toward other small and middle cities also with difficulties and problems. ...

This book [1] was written at an important point in the development of applications of electromagnetic (radio) waves to communications, navigation, and remote sensing. Such applications require accurate propagation predictions for a variety of path conditions, and this book provides the theoretical basis for such predictions. The book is based on fundamental research in electromagnetic wave prop...

Low Earth Orbit (LEO) satellites are an essential complement of the cellular radio infrastructure, especially the Universal Mobile Telecommunications System (UMTS), for mobile (pedestrian and, more important, vehicular) access to the Internet in sparsely populated areas, where high bandwidth UMTS cells cannot be economically deployed. LEO users would eventually switch between the satellite segm...

In this paper, we experimentally study the effects of using low cost optical amplifiers and lasers in multi-format multi-wavelength radio over fiber signals. We analyze the propagation of UMTS, WLAN and WiMAX radio signals in a single channel scenario and study the impact of amplifying the referred radio signals together with amplitude modulated ones, which can be ethernet, in WDM scenario.