To: Bernard Levy who wrote (10596 ) 2/28/2001 3:35:12 PM From: MikeM54321 Respond to Bernard and Thread- It appears to this lay person that UWB is not related to "broadband" from the following Newton's definition. Does the following translate to "bandwidth" in a way I don't understand? Ultra Wideband UWB. Ultra wideband is new radar-like technology that is used for penetrating thick bodies, such as the ground or the walls of a building. UWB technology allow a radar system to detect buried objects such as plastic gas pipes or reveal hidden flaws in roads, bridges, or airport runways. UWB will provide law enforcement officers with a means of covert communication and to provide radar systems that will enable fire and rescue personnel to determine the location of persons inside damaged, burning, or smoke fill buildings. UWB transmission systems are typically centered with the 200 MHz to 4 GHz band and emit an average radiated power of approximately 125 microwatts. According to my techie friends, an ultra-wideband system is a radiator whose intentional emissions have a fractional bandwidth great than or equal to 25% in which the fractional bandwidth is the 20 dB bandwidth divided by the center frequency. Ultrawide Band Radio Also know as Digital Pulse Wireless. The new technology of ultrawide band radio uses a digital transmission consisting of small on-off bursts of energy at extremely low power but over the entire radio spectrum. According to the New York Times, "by precisely timing the pulses within accuracy’s of up to a trillionth of a second, the designers of ultrawide band radio systems are able to create low-power communications systems that are almost impossible to jam, tend to penetrate physical obstacles easily and are almost invulnerable to eavesdropping. Police officers would use such a system "to see through" walls and doors to detect the location of people. According to the New York Times, the most promising application for ultrawide band radio might eventually be an alternative to today's wireless office network technologies that are limited in speed, "because of its design, ultrawide band advocates," according to the Times say the technology has the potential to deliver vastly higher amounts of data because a large number o transmitters could broadcast simultaneously in close proximity without interfering with one another. See also Bluetooth .
