| Introduction to Ultra Wideband for Wireless Communications 2009 Edition Contributor(s): Nikookar, Homayoun (Author), Prasad, Ramjee (Author) |
|
 |
ISBN: 1402066325 ISBN-13: 9781402066320 Publisher: Springer OUR PRICE: $161.49 Product Type: Hardcover - Other Formats Published: October 2008 Annotation: The Ultra Wide Band (UWB) technology has a history dating back to one hundred years ago when G. Marconi sent the first ever wireless transmission from the Isle of Wight to Cornwall on the British mainland using spark-gap transmitters. In the past three decades military developed the UWB technology for ground penetrating radar. In 1998, the Federal Communication Commissions (FCC) recognized the significance of UWB technology and initiated the regulatory review process of the technology. Consequently, in February 2002 the FCC report appeared, in which UWB technology was authorized for the commercial uses with different applications, operating frequency bands as well as the transmitted power spectral densities. Ultra wide band communication is based on the transmission of very short pulses with relatively low energy. In the near future this technology may see increased use for high-speed short range wireless communications and ranging. The UWB technique has a fine time resolution which makes it a proper technology for the accurate ranging. Because of the extremely large bandwidth, the UWB waves have a good material penetration capability. However, as UWB systems operate in a very large bandwidth, they need to share the spectrum with other users as well as with the existing communication systems and consequently, interferences may occur. Besides from the interference from other users, the UWB propagation channel will cause disturbances. |
| Additional Information |
| BISAC Categories: - Technology & Engineering | Mobile & Wireless Communications - Technology & Engineering | Telecommunications |
| Dewey: 621.384 |
| LCCN: 2008932941 |
| Series: Signals and Communication Technology (Hardcover) |
| Physical Information: 0.5" H x 6.14" W x 9.21" (1.03 lbs) 188 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: asakta-buddhih sarvatra . jitatma vigata-sprhah . . . . naiskarmya-siddhim paramam . sannyasenadhigacchati Detached by spiritual intelligence from everything controlling the mind, without material desires, one attains the paramount perfection in cessation of re- tions by renunciation. The Bhagvad Gita (18.49) Compared to traditional carrier-based, Ultra-Wide Band (UWB), or carrier-less, systems implement new paradigms in terms of signal generation and reception. Thus, designing an UWB communication system requires the understanding of how excess bandwidth and very low transmitted powers can be used jointly to provide a reliable radio link. UWB offers systems transceiver potential for very simple implementations. Comparison between UWB and traditional narrow-band systems highlights the following features: Large bandwidth enables very fine time-space resolution for accurate lo- tion of the UWB nodes and for distributing network time stamps. Very short pulses are effectively counter-fighting the channel effect in very dense multipath environments. Data rate (number of pulses transmitted per bit) can be traded with power emission control and distance coverage. Very low power density leads to low probability of signal detection and adds security for all the layers of the communication stack. Very low power density is obtained through radio regulation emission masks; UWB systems are suitable for coexistence with already deployed narrow-band systems. |