Yasser albagory (40 risultati)

Condizione: New. pp. 56.

Paperback. Condizione: Brand New. 56 pages. 8.66x5.91x0.13 inches. In Stock.

Paperback. Condizione: Brand New. 68 pages. 8.66x5.91x0.16 inches. In Stock.

Condizione: New. pp. 116.

Taschenbuch. Condizione: Neu. Circularly Masked Planar Arrays | Modeling & Design | Yasser Albagory | Taschenbuch | 56 S. | Englisch | 2016 | LAP LAMBERT Academic Publishing | EAN 9783659859823 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu. …

Taschenbuch. Condizione: Neu. Mobile Communications System using Stratospheric Platforms | Circular Cell Footprint Analysis and Design | Yasser Albagory | Taschenbuch | 56 S. | Englisch | 2013 | LAP LAMBERT Academic Publishing | EAN 9783659509902 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu. …

Taschenbuch. Condizione: Neu. Direction-of-Arrival Estimation using High-Altitude Platform | Yasser Albagory | Taschenbuch | 68 S. | Englisch | 2017 | LAP LAMBERT Academic Publishing | EAN 9783659931772 | Verantwortliche Person für die EU: LAP Lambert Academic Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu.…

Condizione: New. pp. 164.

Taschenbuch. Condizione: Neu. Concentric Circular Antenna Arrays | Analysis and Design | Yasser Albagory | Taschenbuch | 116 S. | Englisch | 2014 | LAP LAMBERT Academic Publishing | EAN 9783659529542 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu. …

Paperback. Condizione: Brand New. 136 pages. 8.66x5.91x0.31 inches. In Stock.

Paperback. Condizione: Brand New. 136 pages. 8.66x5.91x0.31 inches. In Stock.

Taschenbuch. Condizione: Neu. Beamforming Techniques for High-Altitude Platforms Communications | Yasser Albagory | Taschenbuch | 164 S. | Englisch | 2013 | LAP LAMBERT Academic Publishing | EAN 9783659504136 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu.…

Paperback. Condizione: Like New. LIKE NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -High-Altitude Platform (HAP) is a promising technique for providing wireless communications services with improved performance compared to terrestrial and satellite systems. A critical issue in this emerging system is the difficulty of providing user location information through two-dimensional direction-of-arrival (2D-DOA) estimation due to the high computational complexity and the large covered area. Therefore, in this book, efficient techniques have been introduced to determine user location through 2D-DOA with a reduced processing time. Two techniques are demonstrated where the first is based on vertical uniform linear array located perpendicularly at the center of another uniform circular array. The second technique estimates the 2D-DOA in two stages; the first will utilize a low-resolution 2D-DOA estimation technique such as Bartlett algorithm performed on a low-resolution distance grid, then applying a suitable threshold on the normalized Bartlett 2D-DOA spectrum to define ground windows for the next high-resolution 2D-DOA stage. 68 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In this book, the two-dimensional planar array is designed to reduce the sidelobe levels without any extra processing for the feeding currents or changing the elements locations. The design will trim the elements at the four corners with a specific circular masking function which results in a redistribution of the sidelobes so that the two major planes of sidelobes at th=0 and 90 degrees are reduced at the cost of increasing other negligible sidelobes. The new masked two-dimensional array has the advantage of easier manufacturing over the concentric circular arrays while maintaining almost the same sidelobe levels and patterns. The analysis of the proposed array design shows that the sidelobe levels will be reduced by 4 dB at first sidelobe in the two major sidelobe planes and is more reduced by up to 10 dB at other sidelobes without any processing or change in the feeding currents. In addition, the sidelobe levels can be further reduced by applying amplitude window functions such as the Hamming window in conjunction with the masking which will reduce greatly the sidelobes level to greater than 30 dB below the main lobe level. 56 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In this book, the cell footprint of stratospheric platforms mobile communications system is analyzed and the layout extension is described. The cellular parameters are dependent on the earth surface approximations models where it can be flat or curved especially at lower elevation angle regions. When designing the system coverage, the cell becomes flattened and its eccentricity increases greatly at lower elevation angles as we use circular beams. A technique has been introduced to overcome the broadening of the cells especially at lower elevation angles. This technique is based on the Concentric Circular Arrays where it has been optimized to generate asymmetric beams that provide circular cell footprint at the desired elevation angles. 56 pp. Englisch.…

Condizione: New. Print on Demand pp. 56 2:B&W 6 x 9 in or 229 x 152 mm Perfect Bound on Creme w/Gloss Lam.

Condizione: New. PRINT ON DEMAND pp. 56.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - In this book, the two-dimensional planar array is designed to reduce the sidelobe levels without any extra processing for the feeding currents or changing the elements locations. The design will trim the elements at the four corners with a specific circular masking function which results in a redistribution of the sidelobes so that the two major planes of sidelobes at th=0 and 90 degrees are reduced at the cost of increasing other negligible sidelobes. The new masked two-dimensional array has the advantage of easier manufacturing over the concentric circular arrays while maintaining almost the same sidelobe levels and patterns. The analysis of the proposed array design shows that the sidelobe levels will be reduced by 4 dB at first sidelobe in the two major sidelobe planes and is more reduced by up to 10 dB at other sidelobes without any processing or change in the feeding currents. In addition, the sidelobe levels can be further reduced by applying amplitude window functions such as the Hamming window in conjunction with the masking which will reduce greatly the sidelobes level to greater than 30 dB below the main lobe level.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - In this book, the cell footprint of stratospheric platforms mobile communications system is analyzed and the layout extension is described. The cellular parameters are dependent on the earth surface approximations models where it can be flat or curved especially at lower elevation angle regions. When designing the system coverage, the cell becomes flattened and its eccentricity increases greatly at lower elevation angles as we use circular beams. A technique has been introduced to overcome the broadening of the cells especially at lower elevation angles. This technique is based on the Concentric Circular Arrays where it has been optimized to generate asymmetric beams that provide circular cell footprint at the desired elevation angles.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - High-Altitude Platform (HAP) is a promising technique for providing wireless communications services with improved performance compared to terrestrial and satellite systems. A critical issue in this emerging system is the difficulty of providing user location information through two-dimensional direction-of-arrival (2D-DOA) estimation due to the high computational complexity and the large covered area. Therefore, in this book, efficient techniques have been introduced to determine user location through 2D-DOA with a reduced processing time. Two techniques are demonstrated where the first is based on vertical uniform linear array located perpendicularly at the center of another uniform circular array. The second technique estimates the 2D-DOA in two stages; the first will utilize a low-resolution 2D-DOA estimation technique such as Bartlett algorithm performed on a low-resolution distance grid, then applying a suitable threshold on the normalized Bartlett 2D-DOA spectrum to define ground windows for the next high-resolution 2D-DOA stage.…

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This book provides a comprehensive study on concentric circular antenna arrays and its role in wireless communications. The first chapter reviews the propagation characteristics and mobile channel impairments, then introduces the concept of smart antenna technology and its role in performance improvement for mobile systems. Chapter two describes the various two-dimensional array structures for mobile communications including planer rectangular arrays, circular arrays, and introduces the concentric circular arrays concepts. Finally in chapter three, the concentric circular antenna arrays are extensively studied where its performance in terms of sidelobe level and beamwidth is discussed through different beam design techniques employing the tapered beamforming windows. 116 pp. Englisch.…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Albagory YasserB.Sc in Electronic Engineering in 1998, M.Sc in adaptive arrays for mobile radio communications in 2002 and Ph.D degree in Communications Engineering in the field of High-Altitude Platform Wireless Communications Syste.…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Albagory YasserYasser Albagory is an assistant professor at the department of electronics and communications engineering, faculty of electronic engineering, Menoufia university, Egypt. His research interests include array signal proc.…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Albagory YasserB.Sc and MSc in 1998 and 2002 respectively form the Faculty of Electronic Engineering, Egypt. He also has been awarded the Ph.D degree in electronic engineering in high-altitude platform wireless communications system .…

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In this book, the coverage of High-Altitude Platforms cellular system is analyzed and improved using antenna arrays and beamforming techniques. Firstly, the HAP cell footprint is analyzed and footprint equations are investigated that include the effects of the earth's curvature. Secondly, regarding the cellular layout expansion of HAPs, an algorithm is introduced for cells' beams pointing generation. Thirdly, the carrier-to-interference (CIR) in the HAP tessellated cell structure has been improved using uniform circular antenna arrays (UCCAs) with low-sidelobe levels. Fourthly, the wide area coverage of the HAP is effectively designed for long desert highways coverage using innovated cell shapes. This cell is called 'Worm Cell' as it follows the terrains of the highways and has several advantages such as uniform received power along the highway, reduced radiated power in the unwanted regions, easy and flexible control of the cell pattern and length and reduced handoff and location updating rates. 164 pp. Englisch.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - This book provides a comprehensive study on concentric circular antenna arrays and its role in wireless communications. The first chapter reviews the propagation characteristics and mobile channel impairments, then introduces the concept of smart antenna technology and its role in performance improvement for mobile systems. Chapter two describes the various two-dimensional array structures for mobile communications including planer rectangular arrays, circular arrays, and introduces the concentric circular arrays concepts. Finally in chapter three, the concentric circular antenna arrays are extensively studied where its performance in terms of sidelobe level and beamwidth is discussed through different beam design techniques employing the tapered beamforming windows.…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Albagory YasserBSc, MSc, and PhD in 1998, 2002, and 2008 respectively from the Faculty of Electronic Engineering, Menoufia University, Egypt. He has many books and papers in the filed of Smart Antennas and High-Altitude Platforms Com.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In this book, the two-dimensional planar array is designed to reduce the sidelobe levels without any extra processing for the feeding currents or changing the elements locations. The design will trim the elements at the four corners with a specific circular masking function which results in a redistribution of the sidelobes so that the two major planes of sidelobes at ¿=0 and 90 degrees are reduced at the cost of increasing other negligible sidelobes. The new masked two-dimensional array has the advantage of easier manufacturing over the concentric circular arrays while maintaining almost the same sidelobe levels and patterns. The analysis of the proposed array design shows that the sidelobe levels will be reduced by 4 dB at first sidelobe in the two major sidelobe planes and is more reduced by up to 10 dB at other sidelobes without any processing or change in the feeding currents. In addition, the sidelobe levels can be further reduced by applying amplitude window functions such as the Hamming window in conjunction with the masking which will reduce greatly the sidelobes level to greater than 30 dB below the main lobe level.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 56 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In this book, the cell footprint of stratospheric platforms mobile communications system is analyzed and the layout extension is described. The cellular parameters are dependent on the earth surface approximations models where it can be flat or curved especially at lower elevation angle regions. When designing the system coverage, the cell becomes flattened and its eccentricity increases greatly at lower elevation angles as we use circular beams. A technique has been introduced to overcome the broadening of the cells especially at lower elevation angles. This technique is based on the Concentric Circular Arrays where it has been optimized to generate asymmetric beams that provide circular cell footprint at the desired elevation angles.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 56 pp. Englisch.…