44-7
Chapter One
Introduction
Robert Caiming Qiu, Xuemin (Sherman) Shen, Mohsen Guizani
and Tho Le-Ngoc
1.1 Fundamentals
1.1.1 Overview of UWB
Ultra-wideband (UWB) transmission has recently received significant attention in both
academia and industry for applications in wireless communications. UWB has many
benefits, including high data rate, availability of low-cost transceivers, low transmit power,
and low interference. It operates with emission levels that are commensurate with common
digital devices such as laptops, palm pilots, and pocket calculators. The approval of
UWB technology made by the Federal Communications Commission (FCC) of the
United States in 2002 reserves the unlicensed frequency band between 3.1 and 10.6 GHz
(7.5 GHz) for indoor UWB wireless communication systems. Industrial standards such
as IEEE 802.15.3a (high data rate) and IEEE 802.15.4a (very low data rate with ranging)
based on UWB technology have been introduced. On the other hand, the Department
of Defense (DoD) UWB systems are different from commercial systems in that jamming
is a significan ... read full excerpt from Ultra-Wideband Wireless Communications and Networks ebook
