Assisted Global Navigation Satellite Systems: An Enabling Technology for High Demanding Location-Based Services

[110316.EG Anno 2011, non 2010

Assisted Global Navigation Satellite Systems: An Enabling Technology for High Demanding Location-Based Services

[110316.EG Anno 2011, non 2010

On the use of Galileo SIS and Cellular signals for identification of an hybrid positioning system

Mobile emergency calls need accurate automatic location information. At the present time, several emergency calls are unserved due to the absence of sufficient location information. Regulamentory recommendations and the necessity of providing added value services are driving towards the design of mobile user terminals with improved capabilities, and able to match suitable accuracy requirements. In this paper the positioning accuracy improvement by means of a joint use of Global Navigation Satellite Systems and measurements from Base Transceiver Stations of the cellular network is discussed. A theoretical framework is derived and simulation results are shown in order to demonstrate the performance improvement with respect to pure cellular location techniques

Design of a Local Segment of Galileo Based on Stratospheric Platforms

The use of stratospheric aircraft denoted as High Altitude Platforms (HAPs) Politecnico di Torino Fabio Dovis - Paolo Mulassano SAS Group The use of stratospheric aircraft denoted as High Altitude Platforms (HAPs) represents one of the most challenging perspective for future telecommunication and remote sensing applications. Long Endurance operation (weeks to months), reduced costs, possibility of maintenance and drastic shorter distance from Earth with respect to satellites, make HAPs attractive for a large class of commercial application

Heliplat: A Hale Platform For Telecommunication And Remote Sensing Applications.

this paper we present preliminary results of a feasibility study of a HALE platform as a base station of a cellular system. In particular we will focus on the topic of the adaptive antenna array required to provide high quality of service all over the macrocell; in fact as it can be seen in Figure 3, because of the high altitude of the base station, the theoretical coverage area can be quite large. While in GSM systems the cell size is limited by maximum propagation delay xed by standard [4], in third generation system (UMTS) based on CDMA techniques the system is interference limited, due to the high number of transmitting user in the area covered by the platform base station. The use of multiuser detection and smart antennas on board is necessary to reduce the interference power on the user bandwidth

Heliplat: a HALE Platform for Telecommunication and Remote Sensing Applications

this paper we present preliminary results of a feasibility study of a HALE platform as a base station of a cellular system. In particular we will focus on the topic of the adaptive antenna array required to provide high quality of service all over the macrocell; in fact as it can be seen in Figure 3, because of the high altitude of the base station, the theoretical coverage area can be quite large. While in GSM systems the cell size is limited by maximum propagation delay xed by standard [4], in third generation system (UMTS) based on CDMA techniques the system is interference limited, due to the high number of transmitting user in the area covered by the platform base station. The use of multiuser detection and smart antennas on board is necessary to reduce the interference power on the user bandwidth

HeliNet: A Traffic Monitoring Cost-Effective Solution Integrated with the UMTS System

We present a traffic monitoring system based on the use of unmanned aerodynamic stratospheric platforms equipped with telecommunication pay-loads integrated with the UMTS system. Each platform is designed to independently detect mobiles on the ground or on the sea surface, and can perform as a collecting node for information signals transmitted by mobiles distributed on a large geographic region. In order to develop a system integrated with the future terrestrial communication infrastructure, the data are organized according to the UMTS standard; since the platform can act also as a UMTS base station to support the terrestrial infrastructure, the integration of the traffic monitoring payload with the third generation standard guarantees the cost-effectiveness of the overall syste