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Method for Delivering Secondary (Non-Location) Data to a GPS Receiver

Abstract: 

A method of using a GPS receiver to receive secondary data. A conventional GPS receiver is modified to receive such data, without modifying its hardware. The secondary data is carried in a signal that has the same characteristics as a conventional GPS navigation signal, but is delivered at a specified frequency and time and with a specified and "unused" spreading code. The secondary data is contained in a data subframe that is sufficiently similar to subframes that carry GPS navigation data, such that it can be demodulated and accessed by the GPS receiver.

Patent Number: 
7,126,528
Date Of Issue: 
10/24/2006
Inventors: 

Jennifer L. Alvarez;Roger R. Chiodo;Thomas H. Jaeckle