发明名称 |
RADIO LOCATION SYSTEM INCLUDING TRANSCEIVER TAGS |
摘要 |
An asset management radio location system uses time-of-arrival differentiation for random and repetitive spread spectrum, short d uration pulse "blinks" from object-attached tags, to provide a practical, continuous identification of the location of each and every object within an environment of interest, irrespective whether the object is stationary or moving. Correlation-based RF processors (24) determine which signals received by tag transmission readers (10) are first-to-arrive signals as transmitted from any blinking tag, and an object location processor carries out time-of-arrival differentiation of these first-to-arrive transmissions from any blinking tag to determine where the respective object is located within the environment. A low power interrogation wand may be employed to refine the location of an object by a user programmed transmission - response exchange between the wand and the tag associated with the object of interest.
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申请公布号 |
CA2318904(A1) |
申请公布日期 |
1999.08.05 |
申请号 |
CA19992318904 |
申请日期 |
1999.01.28 |
申请人 |
WIDATA CORPORATION |
发明人 |
BOYD, ROBERT W.;BELCHER, DONALD K.;WOHL, MICHAEL A. |
分类号 |
G01S1/04;G01S5/02;G01S5/04;G01S5/06;G01S13/76;G01S13/82;G01S13/87;G01S19/11;G06K7/00;G06K17/00;(IPC1-7):G01S3/02 |
主分类号 |
G01S1/04 |
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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