"Well informed people know it is impossible to transmit the voice over wires, and that were it possible to do so, the thing would be ofno practical value. " from an editorial in the Boston Post -1865 Fortunately for the telecommunications industry, the unknown author of the above statement turned out to be very mistaken indeed. Even as he spoke, Alexander Graham Bell was achieving the impossible, with a host of competing inventors close behind. The communications revolution which ensued has changed the way in which we live and work, and the way in which we view the world around us. Wired telephone lines now encircle the globe, allowing instantaneous transmission of voice and data. Events from Times Square to Red Square are now as accessible as events on the local courthouse lawn. The advent of wireless communications has extended Bell's revolution to another domain. Personal communications promises voice, data and images which are accessible everywhere. Although predictions are dangerous, a look back over the last decade reveals spectacular growth. In the United States alone, there are now over 50 million cordless phones in use throughout the country -at least one cordless phone for every 3 households - and nearly 20 million pocket pagers. U. S. Cellular telephone service, launched commercially in 1984, has experienced 30-40% annual growth rates despite a sluggish economy.
Wireless Personal Communications: Trends and Challenges presents a wide range of current research activities in wireless communications, reflecting the rapid growth and maturity of the wireless industry. Although overcoming the propagation characteristics of the wireless channel will remain the unique problem confronted by wireless system designers, a plethora of innovative techniques for equalization and interference rejection have emerged. New applications of wireless systems have also been proposed and implemented, ranging from high data rate paging to video transmission. Research in code division multiple access (CDMA) has begun to move from performance evaluation to system design. Research also continues on a broad range of simulation, coding and multiple access techniques. As the wireless community has expanded, there has been a need to draw upon expertise in seemingly disjoint disciplines such as semiconductor design and fabrication, and human factors. In this book, the large number of chapters with multiple authors and from multiple institutions is indicative of the collaborative nature of wireless research, necessitated by the increasing complexity and breadth of wireless systems. Wireless Personal Communications: Trends and Challenges is organized into five sections, each focusing on a distinct set of issues in wireless communications. It is an excellent reference and may be used as a text for advanced courses on wireless communications.
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Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - 'Well informed people know it is impossible to transmit the voice over wires, and that were it possible to do so, the thing would be ofno practical value. ' from an editorial in the Boston Post -1865 Fortunately for the telecommunications industry, the unknown author of the above statement turned out to be very mistaken indeed. Even as he spoke, Alexander Graham Bell was achieving the impossible, with a host of competing inventors close behind. The communications revolution which ensued has changed the way in which we live and work, and the way in which we view the world around us. Wired telephone lines now encircle the globe, allowing instantaneous transmission of voice and data. Events from Times Square to Red Square are now as accessible as events on the local courthouse lawn. The advent of wireless communications has extended Bell's revolution to another domain. Personal communications promises voice, data and images which are accessible everywhere. Although predictions are dangerous, a look back over the last decade reveals spectacular growth. In the United States alone, there are now over 50 million cordless phones in use throughout the country -at least one cordless phone for every 3 households - and nearly 20 million pocket pagers. U. S. Cellular telephone service, launched commercially in 1984, has experienced 30-40% annual growth rates despite a sluggish economy. Artikel-Nr. 9781461361909
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