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Wireless communication systems. --- Multiplexing. --- Orthogonalization methods. --- Functions, Orthogonal family of --- Functions, Orthogonal set of --- Orthogonal family of functions --- Orthogonal set of functions --- Orthogonal sets --- Orthogonal systems --- Orthogonalization (Numerical analysis) --- Sets, Orthogonal --- Systems, Orthogonal --- Algebras, Linear --- Numerical analysis --- Telecommunication --- Communication systems, Wireless --- Wireless data communication systems --- Wireless information networks --- Wireless telecommunication systems --- Telecommunication systems

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Multi-carrier modulation, in particular orthogonal frequency division multiplexing (OFDM), has been successfully applied to a wide variety of digital communications applications for several years. Although OFDM has been chosen as the physical layer standard for a diversity of important systems, the theory, algorithms, and implementation techniques remain subjects of current interest. This book is intended to be a concise summary of the present state of the art of the theory and practice of OFDM technology. This book offers a unified presentation of OFDM theory and high speed and wireless applications. In particular, ADSL, wireless LAN, and digital broadcasting technologies are explained. It is hoped that this book will prove valuable both to developers of such systems, and to researchers and graduate students involved in analysis of digital communications, and will remain a valuable summary of the technology, providing an understanding of new advances as well as the present core technology.

Digital communications. --- Multiplexing. --- Orthogonalization methods. --- Spread spectrum communications. --- Digital communications --- Orthogonal frequency division multiplexing --- Spread spectrum communications --- Orthogonalization methods --- Telecommunications --- Electrical & Computer Engineering --- Engineering & Applied Sciences --- Multiplexing --- Functions, Orthogonal family of --- Functions, Orthogonal set of --- Orthogonal family of functions --- Orthogonal set of functions --- Orthogonal sets --- Orthogonal systems --- Orthogonalization (Numerical analysis) --- Sets, Orthogonal --- Systems, Orthogonal --- Algebras, Linear --- Numerical analysis --- Communications, Spread spectrum --- Telecommunication --- Communications, Digital --- Digital transmission --- Pulse communication --- Digital electronics --- Pulse techniques (Electronics) --- Digital media --- Signal processing --- Digital techniques --- Engineering. --- Electrical engineering. --- Social sciences. --- Electrical Engineering. --- Social Sciences, general. --- OFDM (Telecommunication) --- Broadband communication systems --- Computer engineering. --- Behavioral sciences --- Human sciences --- Sciences, Social --- Social science --- Social studies --- Civilization --- Electric engineering --- Engineering

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Wireless Local Area Networks (WLANs) experience a growing popularity recently. Where WLANs were primarily used for niche applications in the past, they are now deployed as wireless extensions to computer networks. The increase of the datarates from 2 Mbps up to 11 Mbps for roughly a constant price has played a major role in this breakthrough. As a consequence, an even greater success can be envisioned for the more recent OFDM-based WLAN standards in the 5 GHz band, which offer up to 54 Mbps. At IMEC we have realised this potential already several years ago and have established a successful research programme on OF- based WLAN. In 1995, we started our research on wireless OFDM in the frame of a - operation project with SAIT, a Belgian telecom company. The goal of the project was to establish a robust network for industrial environments. This resulted in a first OFDM chip, supporting QPSK, for wireless networking at the end of the project (1999). 1999 was also the start of an intense co-operation with National Semiconductor Inc., which resulted in a second generation ASIC in 2000. This OFDM processor supports up to QAM-64 and has a more optimal channel estimation algorithm.

Orthogonalization methods. --- Wavelength division multiplexing. --- Wireless communication systems. --- Wireless LANs. --- Wireless LANs --- Wireless communication systems --- Orthogonal frequency division multiplexing --- Orthogonalization methods --- Electrical & Computer Engineering --- Engineering & Applied Sciences --- Telecommunications --- Engineering. --- Electrical engineering. --- Electronics. --- Microelectronics. --- Electronic circuits. --- Communications Engineering, Networks. --- Circuits and Systems. --- Signal, Image and Speech Processing. --- Electronics and Microelectronics, Instrumentation. --- Electrical Engineering. --- Wi-Fi LANs --- WiFi LANs --- Wireless local area networks --- WLANs (Wireless LANs) --- Local area networks (Computer networks) --- Communication systems, Wireless --- Wireless data communication systems --- Wireless information networks --- Wireless telecommunication systems --- Telecommunication systems --- Functions, Orthogonal family of --- Functions, Orthogonal set of --- Orthogonal family of functions --- Orthogonal set of functions --- Orthogonal sets --- Orthogonal systems --- Orthogonalization (Numerical analysis) --- Sets, Orthogonal --- Systems, Orthogonal --- Algebras, Linear --- Numerical analysis --- OFDM (Telecommunication) --- Broadband communication systems --- Multiplexing --- Spread spectrum communications --- Telecommunication. --- Systems engineering. --- Computer engineering. --- Signal processing. --- Image processing. --- Speech processing systems. --- Microminiature electronic equipment --- Microminiaturization (Electronics) --- Electronics --- Microtechnology --- Semiconductors --- Miniature electronic equipment --- Electrical engineering --- Physical sciences --- Computational linguistics --- Electronic systems --- Information theory --- Modulation theory --- Oral communication --- Speech --- Telecommunication --- Singing voice synthesizers --- Pictorial data processing --- Picture processing --- Processing, Image --- Imaging systems --- Optical data processing --- Processing, Signal --- Information measurement --- Signal theory (Telecommunication) --- Electron-tube circuits --- Electric circuits --- Electron tubes --- Electric engineering --- Engineering --- WDM (Telecommunication) --- Optical communications