Wimax Explained: System Fundamentals - Tapa blanda

This book explains the functional parts of a WiMax system and its basic operation. You will learn how WiMax can use base stations to provide high speed data connections that can be used for voice, data and video services to distances of over 30 km. The original WiMax system was designed to operate at 10-66 GHz and it had to change to offer broadband wireless access (BWA) in the 2-11 GHz frequency range. To do this, the WiMax standard includes variants (profiles) that use different combinations of radio channel types (single carrier -vs- multicarrier), modulation types, channel coding types to provide fixed, nomadic or portable services. WiMax can provide multiple types of services to the same user with different QoS levels. For example, it is possible to install a single WiMax transceiver in an office building and provide real time telephone services and best effort Internet browsing services on the same WiMax connection. To do this, WiMax was designed to mix contention based (competitive access) and contention free (polled access) to provide services which have different quality of service (QoS) levels. You will learn about WiMax protocols and how they are designed to allow for point to point (PTP), point to multipoint (PMP) and mesh networks. Operators can use the mesh configuration to allow it to link base stations without the need to install or lease interconnecting communication lines. Some of the services WiMax operators can provide include leased line, residential broadband, commercial broadband and digital television (IPTV) services. WiMax can use radio channel bandwidths that can vary from 1.25 MHz to 28 MHz and data transmission rates can exceed 155 Mbps. The types of data connections on WiMax radio channels include basic (physical connection), primary (device control), secondary (configuration) and transport (user data). You will learn about the typical range for WIMAX systems and how to extend the range of WIMAX systems through the use of directional antennas. Some of the most important topics featured include: . The Functional Parts of WiMax Systems . Basic WiMax Operation . The Types of WIMAX Services . Data Transmission Rates . WIMAX Industry Standards . WIMAX Technology Evolution . Protocols Used in WiMax . Physical and Logical Channel Types . The Different Types of WIMAX Devices . Basic Security Operation

LAWRENCE HARTE is the president of APDG, a provider of expert information to the telecommunications market.

Mr. Harte has over 23 years of experience in the electronics industry, including company leadership, product management, development, marketing, design, and testing of telecommunications (cellular), radar, and microwave systems. He has been issued patents relating to cellular technology. He has authored over 75 articles on related subjects and has been a speaker and panel moderator at industry trade events.

Mr. Harte earned an executive MBA at Wake Forest University and received his B.A. from the University of the State of New York. During the TDMA digital cellular standard development process, Mr. Harte served as an editor and voting company representative for the Telecommunications Industries Association (TIA) TR45.3., digital cellular standards committee.

As of 2001, Mr. Harte has authored and co-authored over 20 books relating to telecommunications technology. He has served as a consultant and expert witness for leading companies including Ericsson, Siemens, VLSI, AMD, Casio, Samsung, Sony, ATT, Nokia, Hughes, and many others.

RICHARD LEVINE is the founder and principal engineer of Beta Scientific Laboratory and is also Adjunct Professor of Electrical Engineering at Southern Methodist University. He is active as a technology consultant to many firms developing new cellular and PCS systems and products used in Brazil, Canada, England, France, Germany, Israel, Korea, Mexico, and the United States.

Mr. Levine is a well-known teacher of cellular and PCS technology to people in the industry. He was formerly the chairman of several working groups in the North American digital cellular standards development.

Mr. Levine earned the Bachelor, Master, and Doctor of Science degrees from M.I.T., is licensed as a Professional Engineer, and has earned both amateur and professional radio operator licenses. He has been issued several patents on telecommunications, computer systems, and related technologies.

ROMAN KITKA is the Director, Strategy and Business Crteation, Nokia Ventures Organization. He is a seasoned wireless communications industry veteran, innovator, and visionary.

During his 17 + years in wireless communications, he has held product planning and development, marketing, and market/business development positions with leading wireless manufacturers including Nokia Mobile Phones, Panasonic, GoldStar, and OKI Telecom. Mr. Kitka has influenced several cellular mobile, transportable, and portable phone model designs, features, and functionality. His efforts have resulted in the first cellular payphone, first cellular PBX adjunct "Business Link," voice recognition dialers, as well as the first PCS product launch in the U.S.

Mr. Kitka posssess exceptional foresight and understanding of global market needs, both from anthropological and psychological aspects, as well as the opportunities provided by existing and future wireless communications, Internet and related technologies, and business.

Mr. Kitka, a graduate of Rutgers University in New Jersey, is a co-author of the books CDMA IS-95 FOR CELLULAR AND PCS: Technology, Economics & Services; DELIVERING xDSL; 3G CELLULAR AND PCS DEMYSTIFIED; and WAP DEMYSTIFIED. Mr. Kitka has been a speaker at several wireless communications and Internet conferences and events, both in the U.S. and internationally.