<HTML>Eine neue Verbindung von Mikrowellenkommunikations- und Mikrowellenradartechnik auf Ultraweitbandbasis läßt sich selbst von militärischen Spezialgeräten kaum mehr erfassen. Die Strahlung geht (bei geringer Intensität) im allgemeinen elektromagnetischen Rauschen unter. Ultraweitband bedeutet hier, dass Mikrowellenstrahlung in verschiedenenen Frequenzen gleichzeitig abgestrahlt wird.
“UWB transmits a flood of ultra-short microwave pulses of energy… that extend over an extremely wide band of energy covering several gigahertz of frequency. With the spreading of impulse energy over such a wide frequency spectrum, the signal power falls near or within the noise floor making these signals extremely difficult to detect, intercept or jam…”
(Siehe auch: Frequenzneuverteilung dank "Ultraweitband"? Eine neue Art der Funkübertragung wirft bisherige Prinzipien komplett über den Haufen telepolis: 26.04.2004 [
www.heise.de]
US military takes aim at secure wireless
Infrastructure to monitor bases and operate weapons
Robert Jaques, vnunet.com 22 Jun 2005
US researchers have developed a secure wireless Ultra Wideband (UW
data communication network that can be used to help monitor US Air Force bases and Department of Energy nuclear facilities, in addition to wirelessly controlling remotely operated weapons systems.
According to its creators, the technology can enable the deployment of advanced sensors created by fusing UWB communication with UWB radar that can be used to detect intrusion for the protection of tactical forces and forward bases.
"In an age of electromagnetic warfare and increasing threats from malevolent radio frequency (RF) attacks from high-tech adversaries, UWB is of strategic value providing stealth for covert operation by hiding within the noise floor to prevent detection and where other forms of RF communication find it virtually impossible to operate," said Sandia.
The researchers explained that UWB, also known as impulse radio, is different because it does not use a carrier as do other forms of RF for wireless networking or communication technologies.
Instead UWB transmits a flood of ultra-short microwave pulses of energy on the order of 100 pico-seconds in duration that extend over an extremely wide band of energy covering several gigahertz of frequency.
"With the spreading of impulse energy over such a wide frequency spectrum, the signal power falls near or within the noise floor making these signals extremely difficult to detect, intercept or jam and, when combined with AES, virtually impossible to crack," said H Timothy Cooley, senior scientific engineer at Sandia.</HTML>
