Infrastructure-aiding for satellite navigation receiver and method
Patent 6473030 Issued on October 29, 2002. Estimated Expiration Date: 
February 28, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 28, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesClient-server based remote locator device Calibration for wireless location system Modified transmission method for improving accuracy for e-911 calls Patent #: 6334059 InventorsAssigneeApplicationNo. 797521 filed on 02/28/2001US Classes:342/357.03, Using differential correction342/357.09, With transmission of location-indicative information to or from a remote station342/357.1, Combined with telecommunication701/214, Means to improve accuracy of position or location701/215Having multiple GPS antennas or receivers (e.g., differential GPS)ExaminersPrimary: Blum, Theodore M.International ClassesG01S 005/02H04B 007/185 AbstractA navigation system comprises a cell-phone, a base cellular telephone site, and a webserver. Each is paired with a GPS receiver. The GPS receiver associated with the cell-phone is aided with information received from the cell-site and webserver that help reduce satellite search uncertainty. Time difference and/or frequency difference measurements are taken with data collected from what the cell-phone and its GPS receiver assume to be accurate time and frequency. Correction information is used in post-processing of the velocity solutions computed by the cell-phone to arrive at more precise determinations for the system. | |
