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Two dimension RF location method and apparatus

  • US 7,126,471 B2
  • Filed: 09/27/2004
  • Issued: 10/24/2006
  • Est. Priority Date: 09/27/2004
  • Status: Active Grant
First Claim
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1. A system for generating information identifying a two-dimensional location of objects in within a space, comprising:

  • a plurality of wireless modules, each of the plurality of wireless modules corresponding to one of the objects;

    first and second radio transceiver systems spaced apart by a predetermined distance, the first and second radio transceiver systems disposed proximate the space, each of the first and second radio transceiver systems operable to selectively transmit a signal to select wireless module, receive a response signal from the select wireless module, and generate first information based on a detected relationship between the selective transmission and the receipt of the response signal; and

    a device operable to calculate a two-dimensional location of the select wireless module based on the first information generated by the first radio transceiver system and the first information generated by the second radio transceiver system.

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