Method for aiding a global positioning system

• US 6,684,158 B1
• Filed: 05/22/2002
• Issued: 01/27/2004
• Est. Priority Date: 02/28/2001
• Status: Expired due to Term

• Current Assignee: CSR Technology Incorporated (Qualcomm, Inc.)
• Original Assignee: SIRF Technology Incorporated (Qualcomm, Inc.)
• Inventors: Zhang, Gengsheng, Vantalon, Nicolas Patrick, Garin, Lionel Jacques, Peng, Leon Kuo-Liang
• Primary Examiner(s): Beaulieu, Yonel
• Assistant Examiner(s): Hernandez, Olga
• Application Number:
  US10/155,614
• Time in Patent Office: 615 Days
• Field of Search: 701/213, 701/200, 731/78.R, 342/350, 342/352, 342/357.06, 342/357.12
• US Class Current: 701/213
• CPC Class Codes: G01S 19/05 providing aiding data
• CPC Class Codes: G01S 19/09 providing processing capability normally carried out by the receiver
• CPC Class Codes: G01S 19/235 Calibration of receiver components
• CPC Class Codes: G01S 19/254 relating to Doppler shift of satellite signals
• CPC Class Codes: G01S 5/0009 Transmission of position information to remote stations involving assistance data G01S5/0236
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A Search Domain Reducing Frequency Transfer in A Multi-Mode Global Positioning System Used With Wireless Networks is disclosed.

Claims

1. A method for improving signal acquisition in a global positioning system (GPS) device, comprising:

obtaining a base station clock frequency from a base station;

determining a first frequency difference between the base station clock frequency and a call processing (CP) clock frequency of the GPS device;

messaging the first difference to a GPS section of the GPS device, the GPS section having a GPS clock;

calculating a second frequency clock difference between the CP clock and the GPS clock; and

generating a error frequency by adding the first difference to the second difference.