Assignee
SIRF TECHNOLOGY HOLDINGS INC
US·24 granted patents·1 pending application·421 citations·filing 2001–2009
Top patents by PatentIndex Score
25 records- 0193US7577448B2Multi-mode global positioning system for use with wireless networksSIRF TECHNOLOGY HOLDINGS INC·Filed 2002·Granted Aug 18, 2009·101 cites·5 claims
- 0291US7428259B2Efficient and flexible GPS receiver baseband architectureSIRF TECHNOLOGY HOLDINGS INC·Filed 2005·Granted Sep 23, 2008·42 cites·13 claims
- 0390US7522100B2Method and device for acquiring weak global navigation satellite system (GNSS) signalsSIRF TECHNOLOGY HOLDINGS INC·Filed 2005·Granted Apr 21, 2009·47 cites·20 claims
- 0490US7459984B2Method and apparatus for self-calibration and adaptive temperature compensation in GPS receiversSIRF TECHNOLOGY HOLDINGS INC·Filed 2005·Granted Dec 2, 2008·26 cites·22 claims
- 0587US7639181B2Method and device for tracking weak global navigation satellite system (GNSS) signalsSIRF TECHNOLOGY HOLDINGS INC·Filed 2006·Granted Dec 29, 2009·33 cites·30 claims
- 0682US7924220B1Method and apparatus for weak data frame sync in a positioning systemSIRF TECHNOLOGY HOLDINGS INC·Filed 2008·Granted Apr 12, 2011·15 cites·25 claims
- 0782US7477189B2Methods and systems for acquisition, reacquisiton and tracking of weak navigational signalsSIRF TECHNOLOGY HOLDINGS INC·Filed 2007·Granted Jan 13, 2009·11 cites·33 claims
- 0881US7847726B2Navigational signal tracking in low power modeSIRF TECHNOLOGY HOLDINGS INC·Filed 2006·Granted Dec 7, 2010·20 cites·36 claims
- 0979US7830951B2Efficient and flexible numerical controlled oscillators for navigational receiversSIRF TECHNOLOGY HOLDINGS INC·Filed 2007·Granted Nov 9, 2010·8 cites·23 claims
- 1077US7568670B2Flexible mounting device for video/map displaySIRF TECHNOLOGY HOLDINGS INC·Filed 2006·Granted Aug 4, 2009·10 cites·10 claims
- 1176US8000378B2Narrow correlator technique for multipath mitigationSIRF TECHNOLOGY HOLDINGS INC·Filed 2006·Granted Aug 16, 2011·6 cites·19 claims
- 1270US7479924B2False reacquisition mitigation in high sensitivity navigational satellite signal receiversSIRF TECHNOLOGY HOLDINGS INC·Filed 2005·Granted Jan 20, 2009·10 cites·34 claims
- 1369US7567208B2Position and time determination under weak signal conditionsSIRF TECHNOLOGY HOLDINGS INC·Filed 2007·Granted Jul 28, 2009·8 cites·28 claims
- 1468US7535414B2Navigational positioning without timing informationSIRF TECHNOLOGY HOLDINGS INC·Filed 2007·Granted May 19, 2009·7 cites·28 claims
- 1567US7778311B2Bit synchronization for weak navigational satellite signalsSIRF TECHNOLOGY HOLDINGS INC·Filed 2005·Granted Aug 17, 2010·7 cites·21 claims
- 1667US7573422B2Advanced power management for satellite positioning systemSIRF TECHNOLOGY HOLDINGS INC·Filed 2002·Granted Aug 11, 2009·27 cites·28 claims
- 1764US7903028B2Ephemeris download from weak signalsSIRF TECHNOLOGY HOLDINGS INC·Filed 2006·Granted Mar 8, 2011·3 cites·35 claims
- 1863US7623067B2Fast search GPS receiverSIRF TECHNOLOGY HOLDINGS INC·Filed 2003·Granted Nov 24, 2009·20 cites·36 claims
- 1961US7743177B2High sensitivity global navigation satellite system (GNSS) receiver platform having DMA controller for transferring between internal and external memorySIRF TECHNOLOGY HOLDINGS INC·Filed 2007·Granted Jun 22, 2010·5 cites·17 claims
- 2061US7719466B2Communications systems that reduces auto-correlation or cross-correlation in weak signalsSIRF TECHNOLOGY HOLDINGS INC·Filed 2007·Granted May 18, 2010·2 cites·19 claims
- 2160US7864898B2Systems and methods for signal acquistion in navigational satellite signal receiversSIRF TECHNOLOGY HOLDINGS INC·Filed 2006·Granted Jan 4, 2011·4 cites·29 claims
- 2257US7859456B2Method of mixed data assisted and non data assisted navigation signal acquisition, tracking and reacquisitionSIRF TECHNOLOGY HOLDINGS INC·Filed 2006·Granted Dec 28, 2010·3 cites·50 claims
- 2352US7693211B2Fast fourier transform based phase locked loop for navigational receiversSIRF TECHNOLOGY HOLDINGS INC·Filed 2006·Granted Apr 6, 2010·2 cites·24 claims
- 2445US7616705B1Monolithic GPS RF front end integrated circuitSIRF TECHNOLOGY HOLDINGS INC·Filed 2001·Granted Nov 10, 2009·4 cites·12 claims
- 2543US2011077891A1Accelerometer-only calibration methodSIRF TECHNOLOGY HOLDINGS INC·Filed 2009·Application pending·0 cites
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