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Topic: Ultra Wide Band

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	I, Cringely . January 24, 2002 - The 100 Mile-Per-Gallon Carburetor \| PBS (Site not responding. Last check: 2007-10-17)
		Ultra Wide Band will either be the beginning of a new age of communication or the end of an old one, and probably both.
		UWB is true digital radio communication, a series of very short electrical pulses (billionths of a second) that exist not on any particular frequency, but on ALL frequencies simultaneously.
		UWB is pretty much immune to eavesdropping, is equally immune to interference or jamming, and because its broad frequency range includes the ultra-low frequencies used to communicate with submerged submarines, UWB can be used easily in buildings and even underground.
	www.pbs.org /cringely/pulpit/pulpit20020124.html (1448 words)

	Cyberfab :: Tips & Technology - Ultra Wide Band
		UWB radar is something like a mix of conventional radar (RAdio Detection And Ranging) technology and spread spectrum radio (SSR) technology, both directly coming from military applications.
		What renders UWB radar very much interesting is the possibility to probe the motion of the internal organs of the human body with a remote non- contact approach which is unique at present time.
		UWB radar technology, which is quite unknown at present time to the general public, and physicians as well, is about to strongly impact in everyday life and in the medical field as well, making it possible to design a novel kind of noninvasive measurement and monitoring devices.
	www.cyberfab.net /TipsTechnology/UltraWideBand.htm (280 words)

	Radio-Electronics.Com :: Ultra Wide Band (UWB) Development
		Known as Ultra Wide Band (UWB) this new technology has much to offer both in the performance and data rates as well as the wide number of application in which it can be used.
		Currently ultra wideband (UWB) technology has been proposed for or is being used in applications from radar and sensing applications right through to high band width communications.
		It is the fact that UWB uses a different approach to wireless or radio transmissions is part of the reason UWB development may appear to be slow.
	www.radio-electronics.com /info/wireless/uwb/uwb_development.php (960 words)

	An Engineering Discussion Paper on Spectrum Allocations for Short Range Devices - 9. Ultra Wide Band Devices - An ... (Site not responding. Last check: 2007-10-17)
		Ultra Wide Band transmitters are defined in a draft ITU-R document as having a bandwidth of greater than 500MHz or greater than 20% of the centre frequency.
		UWB use their wide bandwidths at very power levels to enable them to share spectrum with traditionally licensed services.
		However because of the significant implications which UWB will have on spectrum management in the future it is important that the outcomes from international investigations and standards are closely monitored.
	www.med.govt.nz /rsm/planning/srd/discussion/discussion-10.html (411 words)

	Ultrawideband wants to rule wireless networking - TechUpdate - ZDNet (Site not responding. Last check: 2007-10-17)
		UWB has been around as a theory since 1968 and as a technology for radar and voice/data radio since the early 90s.
		UWB technology is still being implemented, but there have been major strides in its development.
		That's because UWB transceivers are not only low powered and use what any ordinary radio frequency (RF) device will render as noise, but they can only communicate with each other if they're using the exact same signaling scheme.
	techupdate.zdnet.com /techupdate/stories/main/0,14179,2821243,00.html (876 words)

	IMEC seminar: Ultra Wide Band (Site not responding. Last check: 2007-10-17)
		UWB is rapidly emerging as an important technology for the future.
		The result is an ultra wide band, low average power spectral density, signal in the frequency domain.
		The bandwidth of a UWB signal is nominally 250f the carrier frequency.
	www.imec.be /seminars/2001/seminar_25053.html (391 words)

	Amazon.ca: Books: Understanding Ultra Wide Band Radio Fundamentals (Site not responding. Last check: 2007-10-17)
		The general consensus establishes that a signal is UWB if its bandwidth is large with respect to the carrier or center frequency of the spectrum, that is, if its fractional bandwidth is high.
		The most influential milestone in the history of UWB wireless communications was set in April 2002, when the Federal Communications Commission (FCC) approved the first guidelines allowing— at least in the United States —the intentional emission of UWB signals contained within specified emission masks (FCC, 2002).
		The chapter also discusses the generation of UWB signals using nonimpulsive schemes, such as OFDM, in which the ultra wide bandwidth is produced by a very high data rate.
	www.amazon.ca /exec/obidos/ASIN/0131480030 (2646 words)

	UWB Tutorials
		Thus, a UWB signal centered at 2 GHz would have a minimum bandwidth of 500 MHz and the minimum bandwidth of a UWB signal centered at 4 GHz would be 1 GHz.
		Direct-sequence UWB signal generation and measurement Ultra-wideband (UWB) radio signals have characteristics that are different from conventional radios.
		UWB signals are generated using short, video-like pulses that are transmitted over a wide range of spectrum.
	www.palowireless.com /uwb/tutorials.asp (1001 words)

	Ofcom Website \| Ultra Wide Band Activities Update
		Ofcom (in whom the duties of the Radiocommunications Agency were vested at the end of 2003) is continuing to gather evidence on the advantages and disadvantages of Ultra Wide Band (UWB), and is participating in the work of CEPT and ETSI within Europe as well as ITU-R in the International arena.
		Ultra wide band (UWB) spreads energy instantaneously across a very wide bandwidth due to the very fast pulsing of the signal.
		TG 31A, is developing a standard for generic UWB in the band 3.1 to 10.6 GHz, a separate standard for ground probing radar and a further standard for measuring levels in vessels, tanks, etc.
	wwww.radioauthority.org.uk /radiocomms/ifi/glines/uwb/uwb_activ_upd0204?a=87101 (1872 words)

	Ultra Wide-Band Radar Imaging of Stones in Dense Grass (Site not responding. Last check: 2007-10-17)
		Due to ultra-wide band (UWB) performances implemented by impulse or step-frequency technique resulted in high spatial resolution achieved those radars are applied for demining also [2, 4-6].
		Other implementation of the stand-off operation for demining is a UWB synthetic-aperture polarimetric radar system mounted to the basket of a telescoping boom lift, which has been developed for minefield detection namely but not separated mines [4].
		The primary goal was to develop UWB radar-based system to find automatically in real-time invisible hidden objects in dense grass or vegetation at the safe distance before the moving platform with radar housed on it [7].
	demining.jrc.it /aris/events/mine99/program/P111-116/pag111-116.htm (2369 words)

	Radio-Electronics.Com :: Ultra Wide Band (UWB)
		Ultra-Wide Band (UWB) is a rapidly emerging wireless technology that promises data rates well beyond those possible with currently deployed technologies such as 802.11a, b, g, WiMax and the like.
		The fact that UWB transmissions have such a wide bandwidth means that they will cross the boundaries of many of the currently licensed carrier based transmissions.
		The alternative technology uses a wide band or multiband orthogonal frequency division multiplex (MBOFDM) signal that is effectively a 500 MHz wide OFDM signal that is hopped in frequency to enable it to occupy a sufficiently high bandwidth.
	www.radio-electronics.com /info/wireless/uwb/uwb_overview.php (808 words)

	Ultra-Wideband (Site not responding. Last check: 2007-10-17)
		While early Ultra Wideband (UWB) systems were used in military surveillance applications, the technology has attracted increasing attention from the consumer communications sector over the last few years.
		UWB systems transmit signals across a much wider frequency spectrum than other types of radio, with a fraction of the power output.
		The use of UWB in the UK is currently only allowed under a strict licensing scheme, although Ofcom is in the process of deciding whether or not it will allow UWB on a license-exempt basis.
	www.global-net.co.uk /ultra_wide_band.htm (325 words)

	MCSE Seminar Ultra Wide Band
		Als we deze berichten moeten geloven staan we aan de vooravond van een nieuwe hype en betekent UWB een oplossing voor een groot aantal van de problemen met de huidige draadloze telecommunicatie.
		Een feit is dat UWB op fundamentele aspecten afwijkt van conventionele radiotechnologieën.
		Besproken wordt binnen welke sectoren UWB een toegevoegde waarde kan hebben; m.a.w.
	www.mcse.nl /bestanden/ultrawideband.php (791 words)

	Ultra-Wideband (UWB) Technology, Technology & Research at Intel
		Specifically, UWB is defined as any radio technology having a spectrum that occupies a bandwidth greater than 20 percent of the center frequency, or a bandwidth of at least 500 MHz.
		UWB could eliminate these wires, allowing people to "unwire" their lives in new and unexpected ways.
		With the standardization of a common UWB development platform, device manufacturers in the PC, mobile, and consumer electronics markets will be able to easily use UWB as the radio or transport mechanism, taking advantage of the low power and high bandwidth this technology provides.
	www.intel.com /technology/comms/uwb (892 words)

	Ultra Wideband Frequently Asked Questions (Site not responding. Last check: 2007-10-17)
		First of all, the term "ultra wideband" is a relatively new term to describe a technology which had been known since the early 1960’s as "carrier-free", "baseband" or "impulse" technology.
		UWB is an RF wireless technology, and as such is still subject to the same laws of physics as every other RF technology.
		Ultra Wideband technology has been the technology of choice for these applications, and the Task Group met in San Francisco the week of 21 July 2003 to down select from an original set of 31 PHY proposals.
	www.multispectral.com /UWBFAQ.html (6933 words)

	Ultra-Wide Band Technology (Site not responding. Last check: 2007-10-17)
		UWB communication is accomplished by transmitting wideband, ultra-short pulses, and receiving those pulses remotely.
		We propose to develop a family of ultra-wide band communication links with instantaneous synchronization and channel equalization capabilities, two of the most difficult tasks in UWB link design.
		This type of UWB modulation is distinctly different from the pulse position and pulse width modulation techniques commonly used in other UWB or optical systems.
	www.advantaca.com /uwb.htm (176 words)

	Ultra-wide Band Communication Transceiver Design (Site not responding. Last check: 2007-10-17)
		The ultra-wide bandwidth (UWB) wireless communication, owing to its advantages over narrow-band communication schemes, has received intensive research interest from both industry and academia in recent years.
		Despite its great commercial potential, application of UWB technology in communication is faced with several technical challenges.
		Among them is the UWB signal acquisition, a critical step for the communication link to be set up, for which the techniques useful for conventional narrow/wide-band signals are either inefficient or too costly to implement.
	www.eng.iastate.edu /abstracts/viewabstract.asp?id=1536 (182 words)

	What is UWB? - A Word Definition From the Webopedia Computer Dictionary
		Short for Ultra Wide Band, a wireless communications technology that can currently transmit data at speeds between 40 to 60 megabits per second and eventually up to 1 gigabit per second.
		UWB transmits ultra-low power radio signals with very short electrical pulses, often in the picosecond (1/1000th of a nanosecond) range, across all frequencies at once.
		UWB receivers must translate these short bursts of noise into data by listening for a familiar pulse sequence sent by the transmitter.
	www.webopedia.com /TERM/U/UWB.html (183 words)

	Understanding Ultra Wide Band Radio Fundamentals - $75.65 (Site not responding. Last check: 2007-10-17)
		The UWB standard has several advantages including high transmission rates and the ability to carry signals while accounting for solid matter interference.
		UWB devices can be used for a variety of communications applications involving the transmission of very high data rates over short distances without suffering the effects of multi-path interference.
		UWB communication devices could be used to wirelessly distribute services such as phone, cable, and computer networking throughout a building or home.
	www.phptr.com /title/0131480030 (571 words)

	Following the IDF: Ultra Wide Band Wireless Data Transfer Technology
		So, for the UWB to succeed we must create not only keys (pulse oscillators) of a strictly defined form and a switch time of around 3 GHz, but also develop high-quality detectors of such pulses which is a loads more complicated problem.
		The most important advantage is that a UWB transmitter needs no its analog part - a signal can be sent to the air right from the chip, and in case of reception this analog part is much simpler and can be realized within the frames of not only hybrid technologies but also base ones, i.e.
		One more interesting aspect of the UWB comes from radio location (where wideband technologies were most often used before): a potential possibility to create networks able to define geometrical positions of objects.
	www.digit-life.com /articles2/uwb (2320 words)

	Military's 'sneaky wave' out of hiding \| CNET News.com
		Supporters of UWB technology say it's a cheaper, less power-hungry way to wirelessly connect at short range than Bluetooth, the most popular WPAN technology now in use, which has been embraced by cell phone makers and creators of personal digital assistants, as well as by Microsoft and Apple Computer.
		UWB is a truly "wide" band, but just how wide it should be is one of the major questions Intel and the other IEEE members will answer this week.
		Once known as the "sneaky wave," UWB was developed by the U.S. military to communicate without being caught by then modern-day eavesdropping techniques.
	news.com.com /2100-1039-992071.html (964 words)

	Ultra Wide Band
		UWB devices operate by employing very narrow or short duration pulses that result in very large or wideband transmission bandwidths.
		UWB devices are designed to operate in spectrum occupied by existing radio services thereby creating the potential for more efficient use of the radio spectrum.
		The range of UWB devices cited by the presenters at this colloquium was short (around 10m), with 30m being ideal.
	www.ofcom.org.uk /static/archive/ra/topics/uwb/uwb-index.htm (623 words)

	A Brief History of Ultra Wideband (Site not responding. Last check: 2007-10-17)
		The origin of ultra wideband (UWB) technology stems from work in time-domain electromagnetics begun in 1962 to fully describe the transient behavior of a certain class of microwave networks through their characteristic impulse response (Ross 1963, 1966).
		The term: Ultra Wideband or UWB signals has come to signify a number of synonymous terms such as: impulse, carrier-free, baseband, time domain, nonsinusoidal, orthogonal function and large-relative-bandwidth radio/radar signals.
		Contributions to the development of a field addressing UWB RF signals commenced in the late 1960's with the pioneering contributions of Harmuth at Catholic University of America, Ross and Robbins at Sperry Rand Corporation and Paul van Etten at the USAF's Rome Air Development Center.
	www.multispectral.com /history.html (3668 words)

	New-Ultra-Wide-Band-technology-(Milnes)(Curry)- (Site not responding. Last check: 2007-10-17)
		Also, the Fourier transform of a sharp pulse is a very wide stepctrum, so I would expect that if the spectrum were measured and inverse transformed (by a Fast Fourier Transform algorithm) one might be able to recover the original pulse shapes.
		Thus, having a wide spectrum does not prevent the biological effects from occurring.
		UWB systems fall into two > categories: systems that use radar techniques for precise > measurements of distance and detection or imaging of objects; and > communicating systems that can be used for voice, data and control > signals.
	www.wave-guide.org /archives/emf-l/Aug2000/New-Ultra-Wide-Band-technology-(Milnes)(Curry)-.html (637 words)

	The Ultra Wideband Weblog - uwb.weblogsinc.com (Site not responding. Last check: 2007-10-17)
		Two laptops enabled with a UWB module and Bluetooth dongle were made available for viewers to see what the company claims is a “pure Bluetooth-to-Bluetooth demo” featuring a file transfer between the two devices at a maximum rate of 1Mbits/sec.
		You can rest assured the UWB Forum will be hastily arranging a demonstration by one of their members companies based on it’s specification to counter this one.
		A draft of UWB regulations published last week seems to favor Freescale Semiconductor and its view of the standard, but there is concern expressed by European regulators that existing standards agreed to in the U.S. could cause interference with wireless networks operating at different frequencies on the continent.
	uwb.weblogsinc.com (1323 words)

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