wireless USB using UWB technology

          Today, most computer and consumer electronic devices-everything from a digital camcorder and DVD player to a mobile PC and a high-definition TV (HDTV)-require wires (USB- universal serial bus) to record, play or exchange data.Intel leads the way in providing a version of USB, called Wireless USB that strives to eliminate wire clutter and provide the convenience of high speed wireless technology .
         Wireless USB is a short-range, high-bandwidth wireless radio communication protocol ("WUSB" ) .Wireless USB is based on the WiMedia Alliance's Ultra-WideBand (UWB) common radio platform, which is capable of sending 480 Mbit/s at distances up to 3 meters and 110 Mbit/s at up to 10 meters.
                                              
              How UWB Works

UWB differs substantially from conventional narrowband radio frequency (RF) and spread spectrum technologies (SS), such as Bluetooth Technology and 802.11a/b/g.A UWB transmitter works by sending billions of pulses across a very wide spectrum of frequency several GHz in bandwidth. The corresponding receiver then translates the pulses into data by listening for a familiar pulse sequence sent by the transmitter.UWB’s combination of larger spectrum,lower power and pulsed data improves speed and reduces interference with other wireless spectra. 

       In the United States, the Federal Communications Commission (FCC) has mandated that UWB radio transmissions can legally operate in the range from 3.1 GHz up to 10.6 GHz, at a 

limited transmit power of –41dBm/MHz. The result is dramatic short-range channel capacity and limited interference UWB has traditional applications in non-cooperative radar imaging. Most recent applications target sensor data collection, precision locating and tracking


REFERENCES : WWW.USB. ORG