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Author: Harald Witschnig Publisher: ISBN: 9783836492850 Category : Technology & Engineering Languages : en Pages : 184
Book Description
The concepts of frequency domain equalization represent the most powerful strategies to combat time dispersion caused by multipath propagation in broadband wireless communication systems. Performing equalization in the frequency domain allows for a computational efficient implementation because the effort grows significantly lower with the bandwidth compared to equalization in the time domain. Two well known frequency domain concepts exist: OFDM (Orthogonal Frequency Division Multiplexing) and SC/ FDE (Single Carrier Transmission with Frequency Domain Equalization). While the interest on OFDM was almost overwhelming, the interest on SC/FDE has been growing rapidly only recently. A primary topic of this work is the extension and alternative formulation of the SC/FDE system as it is usually understood. Further more the basic concept is characterised in terms of equalization strategies, higher order modulation schemes, synchronization, channel estimation, channel coding or front-end implementation effort. Finally an overall comparison of OFDM and SC/FDE is carried out, characterising advantages and disadvantages.
Author: Harald Witschnig Publisher: ISBN: 9783836492850 Category : Technology & Engineering Languages : en Pages : 184
Book Description
The concepts of frequency domain equalization represent the most powerful strategies to combat time dispersion caused by multipath propagation in broadband wireless communication systems. Performing equalization in the frequency domain allows for a computational efficient implementation because the effort grows significantly lower with the bandwidth compared to equalization in the time domain. Two well known frequency domain concepts exist: OFDM (Orthogonal Frequency Division Multiplexing) and SC/ FDE (Single Carrier Transmission with Frequency Domain Equalization). While the interest on OFDM was almost overwhelming, the interest on SC/FDE has been growing rapidly only recently. A primary topic of this work is the extension and alternative formulation of the SC/FDE system as it is usually understood. Further more the basic concept is characterised in terms of equalization strategies, higher order modulation schemes, synchronization, channel estimation, channel coding or front-end implementation effort. Finally an overall comparison of OFDM and SC/FDE is carried out, characterising advantages and disadvantages.
Author: Roberto Moreno Díaz Publisher: Springer ISBN: 3540758674 Category : Computers Languages : en Pages : 1252
Book Description
This book constitutes the thoroughly refereed post-proceedings of the 11th International Conference on Computer Aided Systems Theory, EUROCAST 2007. Coverage in the 144 revised full papers presented includes formal approaches, computation and simulation in modeling biological systems, intelligent information processing, heuristic problem solving, signal processing architectures, robotics and robotic soccer, cybercars and intelligent vehicles and artificial intelligence components.
Author: Harry R. Anderson Publisher: John Wiley & Sons ISBN: 9780470844380 Category : Technology & Engineering Languages : en Pages : 532
Book Description
Drahtlose Systeme mit fester Bandbreite sind eine mögliche Technologie, mit der Endnutzer im privaten oder geschäftlichen Bereich an breitbandige Internet- und andere Dienste angebunden werden können. In diesem Werk finden Sie alle wesentlichen Informationen über solche Systeme. - drahtlose Systeme mit fester Bandbreite sind billiger und schneller anwendbar als traditionelle Glasfaser- oder telefongebundene Lösungen - Netzwerk mit fester Bandbreite kann viel größere Datenraten zur Verfügung stellen als die derzeit im Kommen befindlichen zellularen Systeme der dritten und vierten Generation - hier werden zugrunde liegende Prinzipien kurz und knapp eingeführt sowie fortgeschrittene Netzwerke, Vielfachzugang und Techniken für die Funkschnittstelle besprochen - drahtlose Systeme mit fester Bandbreite werden im Kontext der zuvor erläuterten Grundgedanken erklärt - besprochen wird der Entwurf und die Inbetriebnahme der Systeme
Author: Khaled Fazel Publisher: Springer Science & Business Media ISBN: 9781402044359 Category : Computers Languages : en Pages : 528
Book Description
The benefits and success of multi-carrier (MC) modulation on one side and the flexibility offered by the spread spectrum (SS) technique on the other side have motivated many researchers to investigate the combination of both techniques since 1993. This combination known as multi-carrier spread spectrum (MC-SS) benefits from the advantages of both systems and offers high flexibility, high spectral efficiency, simple detection strategies, narrow-band interference rejection capability, etc. The basic principle of this combination is straightforward: The spreading is performed as direct sequence spread spectrum (DS-SS) but instead of transmitting the chips over a single carrier, several sub-carriers are employed. The MC modulation and demodulation can easily be realized in the digital domain by performing IFFT and FFT operations. The separation of the users’ signals can be performed in the code domain. MC-SS systems can perform the spreading in frequency direction, which allows for simple signal detection strategies. Since 1993, MC-SS has been deeply studied and new alternative solutions have been proposed. Meanwhile, deep system analysis and comparison with DS-CDMA have been performed that show the superiority of MC-CDMA. The aim of Multi-Carrier Spread-Spectrum is to edit the ensemble of the newest contributions and research results in this new field that have been presented during the 5th International Workshop on Multi-Carrier Spread-Spectrum (MC-SS 2005), held in Oberpfaffenhofen, Germany.
Author: Harald Witschnig
Author: Harald Witschnig
Author: 
Author: Michael Fine
Author: Tufik Buzid
Author: Roberto Moreno Díaz
Author: Alois Koppler
Author: 邱俊達
Author: Harry R. Anderson
Author: Khaled Fazel
Author: