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    LOCALIZING TAGGED ASSETS USING MODULATED BACKSCATTER
    2.
    发明公开
    LOCALIZING TAGGED ASSETS USING MODULATED BACKSCATTER 有权
    标记值对象使用调制BACK吊具的国产化

    公开(公告)号：EP2252982A1

    公开(公告)日：2010-11-24

    申请号：EP08726860.3

    申请日：2008-03-14

    申请人： Checkpoint Systems, Inc.

    发明人： WILD, Ben ,  TKACHENKO, Artem ,  RAMCHANDRAN, Kannan ,  MADHOW, Upamanyu

    IPC分类号： G08B13/14

    CPC分类号： G08C21/00 ,  G01S5/02 ,  G01S5/0252 ,  G01S11/02 ,  G01S13/756 ,  G01S13/876

    摘要： Methods and systems for localizing an asset using the modulated backscatter from an asset tag and one or more marker tags are described. The system includes the reader, a location module and one or more marker tags. The location estimates for the asset tag are based partially on a prior knowledge of the location of each of the one or more marker tags. The location for each marker tag may be stored in a database. The location module determines a location estimate for the asset tag using the estimated parameters of the modulated backscatter signals received from one or more marker tags and from the asset tag. Using the known locations of the marker tags, a location estimate of the asset tag can be determined. The location estimate may be a relative location, an absolute location, and/or may be a zone including the marker tags. A mobile reader using the marker tags can localize asset tags throughout a large area and may, for example, take an inventory of assets throughout the large area.