发明名称 |
Localization using virtual antenna arrays in modulated backscatter RFID systems |
摘要 |
A localization method for use in a tag communication system includes associating a supertag having a plurality of tags with an item, reading backscatter signals from the tags of the plurality of tags to provide a plurality of backscatter signals, estimating a signal parameter of the backscatter signals of the plurality of backscatter signals to provide a plurality of derived signal parameters, and localizing the item in accordance with the plurality of derived signal parameters. The backscatter signals are read by a tag reader having a single antenna and the item is localized in accordance with an antenna array technique performed upon the plurality of derived signal parameters. The backscatter signals are read with an antenna array to provide a further plurality of derived signal parameters for each tag of the plurality of tags, and the item is localized in accordance with the further pluralities of derived signal parameters.
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申请公布号 |
US8446253(B2) |
申请公布日期 |
2013.05.21 |
申请号 |
US20100719126 |
申请日期 |
2010.03.08 |
申请人 |
RAMCHANDRAN KANNAN;WILD BEN J.;TKACHENCO ARTEM;MADHOW UPAMANYU;CHECKPOINT SYSTEMS, INC. |
发明人 |
RAMCHANDRAN KANNAN;WILD BEN J.;TKACHENCO ARTEM;MADHOW UPAMANYU |
分类号 |
G08B5/22 |
主分类号 |
G08B5/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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