明星八卦

Ultra Wideband (UWB) systems transmit signals across a much wider frequency than conventional systems and are usually very difficult to detect. The amount of spectrum occupied by a UWB signal, i.e. the bandwidth of the UWB signal is at least 25% of the center frequency. 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. The most common technique for generating a UWB signal is to transmit pulses with durations less than 1 nanosecond.

Ultra-Wideband (UWB) technology brings the convenience and mobility of wireless communications to high-speed interconnects in devices throughout the digital home and office. Designed for short-range, wireless personal area networks (WPANs), UWB is the leading technology for freeing people from wires, enabling wireless connection of multiple devices for transmission of video, audio and other high-bandwidth data. UWB, short-range radio technology, complements other longer range radio technologies such as (Wi-Fi) (WiMAX), and cellular wide area communications. It is used to relay data from a host device to other devices in the immediate area (up to 10 meters, or 30 feet).

UWB radio, along with the convergence layer, becomes the underlying transport mechanism for different applications. Some of the more notable applications that could potentially operate on top of the Common UWB Radio Platform would be Universal Serial Bus (USB), IEEE 1394/FireWire*, next generation of Bluetooth*, and Universal Plug and Play (UPnP*), 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.