In this paper, we consider problem of positioning of mobile phones, different approaches were produced for these targets using GPS, WiFi, GSM, UMTS and other sensors, which exist in today smart phone sensors. Location awareness in general is emerging a tremendous interest in different fields and scopes. Position is the key element of context awareness. However GPS produces an accurate position,...

The massive deployment of cellular mobile radio networks claims attentions to their energy efficiency to favor both the eco-sustainability and the economic aspects. In this paper we study the impact of the power consumption in the design of mobile radio networks. We perform the analysis for GSM and LTE systems. The main aim is the analytical evaluation of the optimal cell radius accounting for ...

An extensive research has been carried out to evaluate method for the tracking of mobile equipment using it’s base stations in a GSM network. Enhanced Observed Time Difference (E-OTD) method is one of the promising and fairly developed positioning technologies that has been standardized for GSM systems. This Method has been utilized in this research work to locate the mobile equipment’s positio...

In this article, we study the reliability of the GSM-R system against the electromagnetic (EM) disturbances present in its railway operating environment. We thus first present the results of electromagnetic environment characterization campaigns on board moving trains in EM conditions representative of those met during a train journey. Then, we describe a new experimental protocol that has been...

When the systems evolved from analog to digital, the performance was improved by the use of power control on the one hand and different modulations and coding schemes on the other. Condensing the available information we are able to propose a new concept of power control. The concept is applicable to real systems, since it uses the available measurements for estimating parameters necessary for ...

Facsimile continues to be communication bedrock for transmitting sensitive business critical documents with legal standing. Traditional facsimile uses PSTN network for communication. As the mobile technology advances, fixed wireless terminals are being used to connect landline devices such as telephone, fax machines etc and transmit using the mobile phone networks. Fixed wireless terminals are ...

introduction:  the  use  of  mobile  communication  systems  has  dramatically  increased  over  the  past  decade. although many studies have been performed to determine the effect of radio frequency (rf) but  less attention has been paid to the possible biological impact of exposure to extremely low frequency  (elf) components.   the objective of this study is two folds. one is to design the ...

Meshed wireless back-haul networks are seen as an affordable technology to bring Internet connectivity into rural and previously unconnected regions. To date, the main focus is to provide access to classical services such as the WWW or email. Access to such services requires the users to use a personal computer or a recent smart phone. Especially in developing regions, the prevailing end user d...