The Experts below are selected from a list of 171 Experts worldwide ranked by ideXlab platform
Yifan Zhang - One of the best experts on this subject based on the ideXlab platform.
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PACRIM - Interference analysis and visualization for multiple Radio Equipment coexistence
2015 IEEE Pacific Rim Conference on Communications Computers and Signal Processing (PACRIM), 2015Co-Authors: Baocong Wang, Qixun Zhang, Zhiyong Feng, Yifan ZhangAbstract:Due to the diverse and complex tasks for the formation, many different Radio Communication Equipment are densely deployed on board, leading to the coexistence among different Equipment a big problem. Therefore, this paper has proposed an interference analysis algorithm for Communication and radar systems and developed a link level simulation system to solve the coexistence problem between radar and Communication systems. Both frequency and distance isolation boundaries are achieved by theoretical analysis to guarantee the coexistence constraints of different Equipment in the ship formation. Simulation results verify the effectiveness and accuracy of proposed interference coexistence methods with frequency and distance isolation boundaries. Finally, the electromagnetic situation map is also designed and developed to identify the source of potential interference among fleet and facilitate the interference analysis.
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Interference analysis and visualization for multiple Radio Equipment coexistence
2015 IEEE Pacific Rim Conference on Communications Computers and Signal Processing (PACRIM), 2015Co-Authors: Baocong Wang, Qixun Zhang, Zhiyong Feng, Yifan ZhangAbstract:Due to the diverse and complex tasks for the formation, many different Radio Communication Equipment are densely deployed on board, leading to the coexistence among different Equipment a big problem. Therefore, this paper has proposed an interference analysis algorithm for Communication and radar systems and developed a link level simulation system to solve the coexistence problem between radar and Communication systems. Both frequency and distance isolation boundaries are achieved by theoretical analysis to guarantee the coexistence constraints of different Equipment in the ship formation. Simulation results verify the effectiveness and accuracy of proposed interference coexistence methods with frequency and distance isolation boundaries. Finally, the electromagnetic situation map is also designed and developed to identify the source of potential interference among fleet and facilitate the interference analysis.
Leo P. Ligthart - One of the best experts on this subject based on the ideXlab platform.
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Cognitive Radio modulation techniques
IEEE Signal Processing Magazine, 2008Co-Authors: I. Budiarjo, Homayoun Nikookar, Leo P. LigthartAbstract:The growing demand on wireless Communication systems to provide high data rates has brought with it the need for a flexible and efficient use of the spectrum resource, which is a scarce commodity. The regional spectrum allocation policy counteracts the free mobility of Radio Communication Equipment. The vast majority of the available spectral resources have already been licensed, so it appears that there is little or no room to add any new services, unless some of the existing licenses are discontinued. Furthermore, recent studies and measurements have shown that vast portions of the licensed spectra are rarely used due to the inflexible spectrum regulations. The whole idea behind cognitive Radio (CR) use is that it should prompt effective spectrum use, since intelligence and learning processes aid the Radio system to access the spectrum effectively. The CR system has learning and understanding capabilities so that the stated goals may be achieved. In this article, we shall limit the scope of cognition to reduce mutual interference between CR-based rental (unlicensed) users (RUs) and licensed users (LUs) and in providing coexistence between them. It is expected that the rental users will be allowed to transmit and receive data over portions of spectra when primary (i.e., licensed) users are inactive. In this article, we will introduce the modulation strategies employed to realize a coexistence between the CR-based rental system and the licensed system. This is done in such a way that the RUs are invisible to the LUs. We consider the rental user accesses the unoccupied LU band in overlay fashion.
Baocong Wang - One of the best experts on this subject based on the ideXlab platform.
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PACRIM - Interference analysis and visualization for multiple Radio Equipment coexistence
2015 IEEE Pacific Rim Conference on Communications Computers and Signal Processing (PACRIM), 2015Co-Authors: Baocong Wang, Qixun Zhang, Zhiyong Feng, Yifan ZhangAbstract:Due to the diverse and complex tasks for the formation, many different Radio Communication Equipment are densely deployed on board, leading to the coexistence among different Equipment a big problem. Therefore, this paper has proposed an interference analysis algorithm for Communication and radar systems and developed a link level simulation system to solve the coexistence problem between radar and Communication systems. Both frequency and distance isolation boundaries are achieved by theoretical analysis to guarantee the coexistence constraints of different Equipment in the ship formation. Simulation results verify the effectiveness and accuracy of proposed interference coexistence methods with frequency and distance isolation boundaries. Finally, the electromagnetic situation map is also designed and developed to identify the source of potential interference among fleet and facilitate the interference analysis.
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Interference analysis and visualization for multiple Radio Equipment coexistence
2015 IEEE Pacific Rim Conference on Communications Computers and Signal Processing (PACRIM), 2015Co-Authors: Baocong Wang, Qixun Zhang, Zhiyong Feng, Yifan ZhangAbstract:Due to the diverse and complex tasks for the formation, many different Radio Communication Equipment are densely deployed on board, leading to the coexistence among different Equipment a big problem. Therefore, this paper has proposed an interference analysis algorithm for Communication and radar systems and developed a link level simulation system to solve the coexistence problem between radar and Communication systems. Both frequency and distance isolation boundaries are achieved by theoretical analysis to guarantee the coexistence constraints of different Equipment in the ship formation. Simulation results verify the effectiveness and accuracy of proposed interference coexistence methods with frequency and distance isolation boundaries. Finally, the electromagnetic situation map is also designed and developed to identify the source of potential interference among fleet and facilitate the interference analysis.
I. Budiarjo - One of the best experts on this subject based on the ideXlab platform.
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Cognitive Radio modulation techniques
IEEE Signal Processing Magazine, 2008Co-Authors: I. Budiarjo, Homayoun Nikookar, Leo P. LigthartAbstract:The growing demand on wireless Communication systems to provide high data rates has brought with it the need for a flexible and efficient use of the spectrum resource, which is a scarce commodity. The regional spectrum allocation policy counteracts the free mobility of Radio Communication Equipment. The vast majority of the available spectral resources have already been licensed, so it appears that there is little or no room to add any new services, unless some of the existing licenses are discontinued. Furthermore, recent studies and measurements have shown that vast portions of the licensed spectra are rarely used due to the inflexible spectrum regulations. The whole idea behind cognitive Radio (CR) use is that it should prompt effective spectrum use, since intelligence and learning processes aid the Radio system to access the spectrum effectively. The CR system has learning and understanding capabilities so that the stated goals may be achieved. In this article, we shall limit the scope of cognition to reduce mutual interference between CR-based rental (unlicensed) users (RUs) and licensed users (LUs) and in providing coexistence between them. It is expected that the rental users will be allowed to transmit and receive data over portions of spectra when primary (i.e., licensed) users are inactive. In this article, we will introduce the modulation strategies employed to realize a coexistence between the CR-based rental system and the licensed system. This is done in such a way that the RUs are invisible to the LUs. We consider the rental user accesses the unoccupied LU band in overlay fashion.
G. Fittipaldi - One of the best experts on this subject based on the ideXlab platform.
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MILCOM - On-Board TTC Transponder for Secure Communications
2011 - MILCOM 2011 Military Communications Conference, 2011Co-Authors: L. Simone, D. Gelfusa, S. Ciarcia, G. FittipaldiAbstract:Thales Alenia Space - Italy (TAS-I) Radio Communication Equipment Group has developed in the last few years a very competitive Digital Platform for Satellite Secure Communications which has been largely used in Telemetry, Tracking and Command (TTC) link for military-oriented programs. The standard Direct Sequence Spread Spectrum Anti-Jamming performances are further enhanced by an Adaptive Digital Filtering to remove part of the interference energy before codes correlation, allowing to cope with a Jammer over Signal Power ration (J/S) up to 50dB. Moreover, PN codes with several years period increases furthermore Data Confidentiality and Transmission Secrecy. This paper offers a complete overview of the advanced Spread Spectrum Equipment for Satellite Secure Communications.
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On-Board TTC Transponder for Secure Communications
2011 - MILCOM 2011 Military Communications Conference, 2011Co-Authors: L. Simone, D. Gelfusa, S. Ciarcia, G. FittipaldiAbstract:Thales Alenia Space - Italy (TAS-I) Radio Communication Equipment Group has developed in the last few years a very competitive Digital Platform for Satellite Secure Communications which has been largely used in Telemetry, Tracking and Command (TTC) link for military-oriented programs. The standard Direct Sequence Spread Spectrum Anti-Jamming performances are further enhanced by an Adaptive Digital Filtering to remove part of the interference energy before codes correlation, allowing to cope with a Jammer over Signal Power ration (J/S) up to 50dB. Moreover, PN codes with several years period increases furthermore Data Confidentiality and Transmission Secrecy. This paper offers a complete overview of the advanced Spread Spectrum Equipment for Satellite Secure Communications.
