07511662 is referenced by 85 patents and cites 59 patents.

The present invention relates to a system and method for providing location determination in a configured environment in which Global Navigation Satellite System Signals may not be available. In this regard, local beacon systems generate spread spectrum CDMA signals that are received by spectral compression units that derive physically meaningful observations without a requirement for correlation of the intercepted energy by means of the known spreading codes. The invention can coexist with communication assets already in place, and the design allows for self calibration, which simplifies installation and usage. The invention has utility in applications in which GNSS signals are unavailable or limited, for example, in warehouse inventory management, in search and rescue operations and in asset tracking in indoor environments.

Title
System and method for positioning in configured environments
Application Number
11/697575
Publication Number
7511662 (B2)
Application Date
April 6, 2007
Publication Date
March 31, 2009
Inventor
Peter F MacDoran
Sanford
FL, US
Kenn L Gold
Colorado Springs
CO, US
Michael B Mathews
Kirkland
WA, US
Agent
Black Lowe & Graham PLLC
Assignee
Loctronix Corporation
WA, US
IPC
H04B 7/185
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