超寬帶技術(shù)與其它短距離無線通信技術(shù)的比較-全文預(yù)覽
【正文】 dwidth and center frequency ratio is more than 25% of munications technologies. With the mon use of continuous carrier munication mode is different, use of UWB wireless signals center frequency GHz, bandwidth of GHz, spectral range is very wide, but transmission power is very low. Communications speed in 250Kbit ~ between 10Mbit/SEC. In 250Kbit/SEC transmission speeds can ensure as munication distance. In short (13m below) a has great advantage, highest transmission speed can reach 1Gb/S. While the traditional narrowband technology in long distance, low speed transmission dominant.Ultrawideband (UWB) technology is initially applied to develop the radar oriented, it is generally thought that it belongs to a kind of carrierless munications technologies. February 2002, the United States the FCC formally its suspension. Currently ultrawideband (UWB) technology is being integrated into the family cinema and portable products, mainly used for video and audio signal of wireless transmission. Ultrawideband (UWB) since when published has been regarded as bluetooth technology substitute, and other wireless technologies such as WLAN, bluetooth etc pared ultrawideband (UWB), with low power waste, high bandwidth and low plexity, the advantages of low cost, can pletely satisfy short family entertainment application requirements. ultrawideband performance characteristics.Uwb wireless munication is a very different to the traditional technology of wireless munication technology. It can realize the wireless LAN LAN and personal regional network PAN wireless Internet and access interface. UWB has the following features:1) strong antijamming performance UWB signal, the launch will be weak radio pulse signal scattered on the broad band, output power and even lower than ordinary equipment of the noise. Received will signal energy reduction out, in the solution enlarge produced during spread spectrum gain. Therefore, and IEEE a, IEEE b and bluetooth,pared to the same code speed conditions, the UWB has a strong antijamming.2) transmission rate is high UWB with very wide frequency bandwidth for highspeed data transmission, and not alone occupy now already crowded frequency resource, but sharing other wireless technology using frequency band. The data rate can reach
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