communication technology

With the development of wireless communication technology, various kinds of wireless communication systems come forth one after another, which causes the available frequency resource becoming rare. Ultra wide band (UWB) communication is a novel short-distance wireless communication technique,in which data are transferred using impulses with very short discount wedding gowns duration .It has many advantages,such as high transmission rate,low Power consumption,good security,highly accurate Positioning capability and low cost. With the approval of FCC,there are increasing interests in studying UWB technologies in both academia and industry.According to FCC’s definition, the concept of UWB is not limited to pulse transmitting. UWB can be extended to cheap shoes blog 2010 continuous transmitting technology as long as the signal band with is larger than 500MHz. At present, there are three kinds of fulfill schemes of UWB communication system, that is carrier-free wedding dresses 2010 pulse scheme, signal carrier DS-CDMA and MB-OFDM. UWB has the traits of: high transmission rate, low Power consumption, ability of accurate orientation. Because of these traits, UWB has become a focus of the cheap wedding gown dresses research on wireless communications.WSN is a kind of Ad-hoc. Each node has a Distributed algorithm and it id essential to use multi-hop transition. WSN based on UWB, the UWB is Particularly attractive due to its highly accurate Positioning capabilities which can forecast the topology of network, low transmission power which can reduce node’s battery power cheap evening dresses consumption, rate and range changing over , etc in a word ,UWB- WSN will have better network capability and better wedding gowns dresses security capability.Most of the study on UWB-WSN is about MAC protocol and routing protocol based on TOA of UWB.
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