E. Re

The American University of Rome, Roma, Latium, Italy

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Publications (11)0.43 Total impact

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    ABSTRACT: Reliable communications are a fundamental means to manage in an effective manner public protection and disaster relief (PPDR) operations, especially in the first hours during the response phase. This paper investigates the expected performance of a physical layer for mobile satellite services based on the LTE specifications, properly adapted to suit the mobile satellite channel and thought to satisfy the current needs of PPDR users. In particular, the effect of the land mobile satellite (LMS) channel frequency selectivity is considered in terms of impacts on the LTE uplink PHY layer performance, as LMS greatly differs in this aspect with respect to the terrestrial mobile channel.
    01/2009;
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    ABSTRACT: The paper addresses the integration architecture (I-concept) between a terrestrial technology—TETRA (TErrestrial Trunked Radio)—and satellite systems. This approach, that enhances and harmonises the features of both technologies, could provide an interesting contribution to the effectiveness of the International Mobile Telecommunications-Advanced (IMT-A) and, hence, to the 4G vision. TETRA can represent an interesting building block of an integrated network devoted to both civil and military scenarios; it meets the “suitable technological capability” requirement for integration, because it represents a consolidated terrestrial technology that can be trusted, hence focusing the integration effort on the definition, design and implementation of proper interfaces. System architectures are here proposed referring to short, medium term and long term scenarios.
    Wireless Personal Communications 05/2008; 45(4):559-568. · 0.43 Impact Factor
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    ABSTRACT: The new vision for the moon exploration calls for a return to the moon in a series of missions that start with robotic. Many of the large-scale features, such as steep crater walls and large boulders, are insurmountable obstacles to the rover. Thus, the development of systems for the guidance of rovers is a crucial issue. In this paper a radio frequency (RF) multifunctional payload for the support of rover operations on the lunar surface is presented. Since the dimensions of Radio-Frequency devices is strictly correlated with the wavelength, the use of higher frequency allows to obtain payload with small dimensions. The instruments proposed in this paper operates in the W-band (75-110 GHz). After an introduction explaining the reasons that could make such a payload successful, the navigation requirements are evaluated on the basis of the expected rover characteristics. Then, the payload functional scheme is presented and its performance and physical features are shown.
    Aerospace Conference, 2008 IEEE; 04/2008
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    ABSTRACT: The future of systems and applications to be developed on either a global or a local scale is increasingly related to an advanced implementation of the so called "Integration concept" (I-concept). The latter can be defined as an approach to the conceivement of systems and applications that is not polarised in terms of technology and medium. The I-concept envisages, for instance, the effective exploitation of wireless or wired connections, the wise mix of satellite, terrestrial and stratospheric technologies to provide optimal system performance at both user and provider level. In this frame, TETRA (terrestrial trunked radio) can be an interesting building block of an I-concept-based network devoted to both civil and military scenarios. In particular, TETRA meets the "suitable technological capability" requirement for integration, because it represents a consolidated terrestrial technology that can be trusted, hence focusing the integration effort on the definition, design and implementation of proper interfaces. In this paper the present status of TETRA technology and its integration with other platforms is presented and framed in the I-concept based general vision. A system analysis is also carried out proposing system architectures referring to two different scenarios, in a medium term and long term perspective.
    Aerospace Conference, 2008 IEEE; 04/2008
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    ABSTRACT: This paper presents the payload design for an in orbit test of W band technology called IKNOW mission (In orbit Key-test and validatioN Of W band). The increasing demand for frequency bands with large bandwidth availability to satisfy satellite communications applications requirements renders mandatory the need to explore higher and higher frequency ranges. W band (75-110 GHz) could represent the answer to these needs due to the large bandwidth availability, allowing to propose many innovative services that need high-volume transfers. Therefore, the exploitation of W band is foreseen in order to meet the high-quality data transmission for a large number of end users and data-oriented services. The IKNOW mission is a demonstrative experiment foreseen within the phase A2 of the WAVE (W band analysis and verification) project, a study funded by the Italian Space Agency (ASI), which aims at designing and developing W band payloads for telecommunication applications. This paper will be focused on the characterization of the IKNOW mission within the WAVE project devoted to carry out a preliminary channel propagation assessment. Specifically, special attention will be paid to the payload design, particularly critical from the technological point of view at these high frequencies. The basic idea is to develop the receiving/transmitting chain using MMIC devices, in order to fit cost, power and weight constraints, typically limited for a spacecraft. Technological critical items will be highlighted, focusing on the present state of the art and presenting some architectural choices. Moreover, some simulations based on ADS software will be reported in order to simulate the performance of the identified payload configuration.
    Aerospace Conference, 2008 IEEE; 04/2008
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    ABSTRACT: It is recognized that W band will be one of the frontier of satellite communications. Pioneering work on the scientific testing of high frequency satellite communications have been DAVID (data and video interactive distribution) mission and WAVE (W band analysis and verification) project, both of them funded by the Italian Space Agency (ASI). The WAVE project was a feasibility study carried out in 2004 for the design and development of a W band geostationary payload. However, a key step towards the exploitation of the W band is the channel characterization. So far, there are no experimental works on W band channel characterization because of the pioneering state of W band communications. This characterization is one of the objective of the second phase of the WAVE project (funded by ASI, started in March 2007) and it will be carried out through two demonstrative missions: 1. mission #1: a payload embarked on a high altitude platform (HAP), Aero-WAVE mission; 2. mission #2: a payload embarked on a LEO nano platform, IKNOW (in-orbit key-test and validation of W band) mission. In this paper, an overview of the first demonstrator, Aero-WAVE, will be outlined on the basis of the preliminary results obtained within phase A2 of WAVE project.
    Aerospace Conference, 2008 IEEE; 04/2008
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    ABSTRACT: The increasing needs of European observation and telecommunication satellite services, with respect to operations efficiency, require the development of an advanced in-orbit infrastructure for data relay services. The function of a data relay satellite is to forward data between two elements with which it has established a direct communication link. Currently the infrastructure is based on the ESA ARTEMIS satellite that has been operative since 2003 and that will be at end-of-life by the end of 2010. In this frame Thales Alenia Space Italia (TAS-I) and University of Rome "Tor Vergata" (TOR) are conceiving the new European Second Generation Data Relay Satellite System (E2GDRSS) based on state of the art and innovative space technologies and telecommunication techniques. This paper presents the main design options according to preliminary trade-off analysis, which will represent the baseline to the design of the full system.
    Aerospace Conference, 2008 IEEE; 04/2008
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    ABSTRACT: WAVE (W band Analysis and VErification) is a project funded by the Italian Space Agency (ASI) with the aim to design and deploy different missions for scientific experimental use of the W band channel in satellite data communications. The second phase (A2) of the Project is currently in progress. This paper summarises the main scientific results early achieved in the WAVE A2 Project on the analysis assessment of W band GEO and LEO satellite missions.
    Proceedings of IEEE International Conference on Communications, ICC 2008, Beijing, China, 19-23 May 2008; 01/2008
  • The Ka and Broadband Conference, Turin, Italy; 09/2007
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    ABSTRACT: In this paper, the main trends of the latest space missions will be outlined, dealing with the advantages of using W-band in space communication systems. In the first part, an overview of the current projects involved in the study of W-band is shown, highlighting the reasons of its future widespread.
    Aerospace Conference, 2007 IEEE; 04/2007
  • 07/2006;