Marco Lisi - Academia.edu (original) (raw)

Papers by Marco Lisi

Proceedings of the 19th …, 2001

Flexibility boons offered by digital beamforming techniques are well known and regarded by the wi... more Flexibility boons offered by digital beamforming techniques are well known and regarded by the wireless telecommunications industry as a key elements of the upcoming mobile network of third generation. Regarding mobile satellite systems, the concept of "smart antennas" implementing adaptive beamforming to real-time counteract co-channel interference seems unreachable on-board the satellite without a drastic increase of the payloads complexity. In order to simplify the satellite architecture, the possibility to entrust to the gateway the exploitation of the more sophisticated adaptive techniques was envisaged. The paper presents results of the studies on the concept of on-ground digital beamforming applied to the return-link of a non-geostationary mobile satellite system.

21st International Communications Satellite Systems Conference and Exhibit, 2003

25th AIAA International Communications Satellite Systems Conference (organized by APSCC), 2007

24th AIAA International Communications Satellite Systems Conference, 2006

... Perspective. 저자, Dr. ing. Marco Lisi (Telespazio SpA). 학술대회명, 24th AIAA International Communi... more ... Perspective. 저자, Dr. ing. Marco Lisi (Telespazio SpA). 학술대회명, 24th AIAA International Communications Satellite Systems Conference. 회의장소, San Diego, California. 회의기간, 2006/06/11-2006/06/14. 주관기관, AIAA. Today's ...

31st AIAA International Communications Satellite Systems Conference, 2013

IEEE Antennas and Propagation Magazine, 2014

ABSTRACT Increased demand for narrow multi-linguistic beams, and a reduction in the number of ant... more ABSTRACT Increased demand for narrow multi-linguistic beams, and a reduction in the number of antennas for multi-spot systems, are revitalizing the need for lossless multimode networks at various frequencies. This paper reviews basic concepts, techniques, and technologies of multimode beamforming networks for satellite multiple beams and reconfigurable antennas.

2009 IEEE International Vacuum Electronics Conference, 2009

ABSTRACT The paper provides a retrospective look at the development of Multi-Port Amplifiers (MPA... more ABSTRACT The paper provides a retrospective look at the development of Multi-Port Amplifiers (MPAs) for satellite communications payloads and discusses future directions and applications.

Basic concepts and technologies of beam forming networks (BFN) for satellite multibeam antennas a... more Basic concepts and technologies of beam forming networks (BFN) for satellite multibeam antennas are reviewed. The extensive use of CAD/CAM techniques is shown to be essential for an accurate design of large, complex BFN's. Optical distribution techniques are also discussed. Their possible application in multibeam antenna systems is likely to greatly improve performances and capabilities of BFN designs.

On behalf of ESA, Alenia Spazio performed, as prime contractor, a study contract for the developm... more On behalf of ESA, Alenia Spazio performed, as prime contractor, a study contract for the development of the third generation of mobile communications via satellite (S-UMTS). In this frame an intense trade-off was required to identify the most suitable system architecture in terms of traffic capacity and complexity. In order to evaluate satellite system capacity, a typical approach consists in performing a link budget with respect to a single user, while a rigorous approach would require the solution of the complete set of user link equations in a dynamic scenario. For the top-level dimensioning of the system, a tool able to quickly provide rough order of magnitude capacity assessment is required. The paper presents an integrated link budget method being used in the system trade-off activities. As compared to a classical approach, the proposed method offers not only an assessment of different system architectures in terms of available traffic capacity but, also allows an assessment of the relative system complexity. To this purpose, a multibeam antenna model was developed to evaluate the antenna subsystem physical and electrical characteristics versus coverage requirements. The tool proved itself very useful in the trade-off phase of the study both to rapidly assess the overall achievable traffic capacity and to perform a sensitivity analysis on different system parameters.

Increased demand for narrow multi-linguistic beams and reduction of number of antennas for multi-... more Increased demand for narrow multi-linguistic beams and reduction of number of antennas for multi-spot systems is revitalizing the need for lossless multi-mode networks at various frequencies. The paper reviews basic concepts, techniques and technologies of multimode beamforming networks for satellite multiple beams and reconfigurable antennas.

ABSTRACT A synthetic overview of the fascinating topic of phased array antennas for satellite com... more ABSTRACT A synthetic overview of the fascinating topic of phased array antennas for satellite communications is presented. A system engineering approach to the design and development of phased arrays is shown to be essential in order to achieve an effective and synergic design and to implement large-scale production techniques. It is the author's firm opinion that a broadband technical background and an open, “lateral thinking” mentality are key factors for the successful design, development and production of active phased arrays

SpaceOps 2012 Conference, 2012

25th AIAA International Communications Satellite Systems Conference (organized by APSCC), 2007

Proceedings of the 19th …, 2001

Flexibility boons offered by digital beamforming techniques are well known and regarded by the wi... more Flexibility boons offered by digital beamforming techniques are well known and regarded by the wireless telecommunications industry as a key elements of the upcoming mobile network of third generation. Regarding mobile satellite systems, the concept of "smart antennas" implementing adaptive beamforming to real-time counteract co-channel interference seems unreachable on-board the satellite without a drastic increase of the payloads complexity. In order to simplify the satellite architecture, the possibility to entrust to the gateway the exploitation of the more sophisticated adaptive techniques was envisaged. The paper presents results of the studies on the concept of on-ground digital beamforming applied to the return-link of a non-geostationary mobile satellite system.

21st International Communications Satellite Systems Conference and Exhibit, 2003

25th AIAA International Communications Satellite Systems Conference (organized by APSCC), 2007

24th AIAA International Communications Satellite Systems Conference, 2006

... Perspective. 저자, Dr. ing. Marco Lisi (Telespazio SpA). 학술대회명, 24th AIAA International Communi... more ... Perspective. 저자, Dr. ing. Marco Lisi (Telespazio SpA). 학술대회명, 24th AIAA International Communications Satellite Systems Conference. 회의장소, San Diego, California. 회의기간, 2006/06/11-2006/06/14. 주관기관, AIAA. Today's ...

31st AIAA International Communications Satellite Systems Conference, 2013

IEEE Antennas and Propagation Magazine, 2014

ABSTRACT Increased demand for narrow multi-linguistic beams, and a reduction in the number of ant... more ABSTRACT Increased demand for narrow multi-linguistic beams, and a reduction in the number of antennas for multi-spot systems, are revitalizing the need for lossless multimode networks at various frequencies. This paper reviews basic concepts, techniques, and technologies of multimode beamforming networks for satellite multiple beams and reconfigurable antennas.

2009 IEEE International Vacuum Electronics Conference, 2009

ABSTRACT The paper provides a retrospective look at the development of Multi-Port Amplifiers (MPA... more ABSTRACT The paper provides a retrospective look at the development of Multi-Port Amplifiers (MPAs) for satellite communications payloads and discusses future directions and applications.

Basic concepts and technologies of beam forming networks (BFN) for satellite multibeam antennas a... more Basic concepts and technologies of beam forming networks (BFN) for satellite multibeam antennas are reviewed. The extensive use of CAD/CAM techniques is shown to be essential for an accurate design of large, complex BFN's. Optical distribution techniques are also discussed. Their possible application in multibeam antenna systems is likely to greatly improve performances and capabilities of BFN designs.

On behalf of ESA, Alenia Spazio performed, as prime contractor, a study contract for the developm... more On behalf of ESA, Alenia Spazio performed, as prime contractor, a study contract for the development of the third generation of mobile communications via satellite (S-UMTS). In this frame an intense trade-off was required to identify the most suitable system architecture in terms of traffic capacity and complexity. In order to evaluate satellite system capacity, a typical approach consists in performing a link budget with respect to a single user, while a rigorous approach would require the solution of the complete set of user link equations in a dynamic scenario. For the top-level dimensioning of the system, a tool able to quickly provide rough order of magnitude capacity assessment is required. The paper presents an integrated link budget method being used in the system trade-off activities. As compared to a classical approach, the proposed method offers not only an assessment of different system architectures in terms of available traffic capacity but, also allows an assessment of the relative system complexity. To this purpose, a multibeam antenna model was developed to evaluate the antenna subsystem physical and electrical characteristics versus coverage requirements. The tool proved itself very useful in the trade-off phase of the study both to rapidly assess the overall achievable traffic capacity and to perform a sensitivity analysis on different system parameters.

Increased demand for narrow multi-linguistic beams and reduction of number of antennas for multi-... more Increased demand for narrow multi-linguistic beams and reduction of number of antennas for multi-spot systems is revitalizing the need for lossless multi-mode networks at various frequencies. The paper reviews basic concepts, techniques and technologies of multimode beamforming networks for satellite multiple beams and reconfigurable antennas.

ABSTRACT A synthetic overview of the fascinating topic of phased array antennas for satellite com... more ABSTRACT A synthetic overview of the fascinating topic of phased array antennas for satellite communications is presented. A system engineering approach to the design and development of phased arrays is shown to be essential in order to achieve an effective and synergic design and to implement large-scale production techniques. It is the author's firm opinion that a broadband technical background and an open, “lateral thinking” mentality are key factors for the successful design, development and production of active phased arrays

SpaceOps 2012 Conference, 2012

25th AIAA International Communications Satellite Systems Conference (organized by APSCC), 2007