Assignee
SIRF TECH INC
US·231 granted patents·6 pending applications·9,661 citations·filing 1996–2012
Top patents by PatentIndex Score
237 records- 0199US6680695B2Communications system that reduces auto-correlation or cross-correlation in weak signalsSIRF TECH INC·Filed 2001·Granted Jan 20, 2004·168 cites·20 claims
- 0299US6574558B2GPS receiver with cross-track holdSIRF TECH INC·Filed 2002·Granted Jun 3, 2003·191 cites·21 claims
- 0398US6915208B2Information transfer in a multi-mode global positioning system used with wireless networkSIRF TECH INC·Filed 2003·Granted Jul 5, 2005·215 cites·54 claims
- 0498US6529829B2Dead reckoning system for reducing auto-correlation or cross-correlation in weak signalsSIRF TECH INC·Filed 2001·Granted Mar 4, 2003·208 cites·20 claims
- 0598US6519466B2Multi-mode global positioning system for use with wireless networksSIRF TECH INC·Filed 2002·Granted Feb 11, 2003·252 cites·20 claims
- 0697US6961019B1Method and apparatus for reducing GPS receiver jamming during transmission in a wireless receiverSIRF TECH INC·Filed 2001·Granted Nov 1, 2005·134 cites·20 claims
- 0797US6850557B1Signal detector and method employing a coherent accumulation system to correlate non-uniform and disjoint sample segmentsSIRF TECH INC·Filed 2000·Granted Feb 1, 2005·322 cites·55 claims
- 0897US6778136B2Fast acquisition of GPS signalSIRF TECH INC·Filed 2001·Granted Aug 17, 2004·188 cites·17 claims
- 0997US6611757B2Global positioning system tag systemSIRF TECH INC·Filed 2002·Granted Aug 26, 2003·193 cites·10 claims
- 1097US6427120B1Information transfer in a multi-mode global positioning system used with wireless networksSIRF TECH INC·Filed 2001·Granted Jul 30, 2002·205 cites·15 claims
- 1196US6930634B2Shared memory architecture in GPS signal processingSIRF TECH INC·Filed 2002·Granted Aug 16, 2005·158 cites·13 claims
- 1296US6738013B2Generic satellite positioning system receivers with selective inputs and outputsSIRF TECH INC·Filed 2002·Granted May 18, 2004·149 cites·19 claims
- 1396US6724342B2Compensation for frequency adjustment in mobile communication-positioning device with shared oscillatorSIRF TECH INC·Filed 2002·Granted Apr 20, 2004·157 cites·25 claims
- 1496US6671620B1Method and apparatus for determining global position using almanac informationSIRF TECH INC·Filed 2000·Granted Dec 30, 2003·224 cites·17 claims
- 1596US6539304B1GPS navigation system using neural networksSIRF TECH INC·Filed 2001·Granted Mar 25, 2003·170 cites·9 claims
- 1696US6531982B1Field unit for use in a GPS systemSIRF TECH INC·Filed 1997·Granted Mar 11, 2003·334 cites·77 claims
- 1796US6522682B1Triple multiplexing spread spectrum receiverSIRF TECH INC·Filed 1999·Granted Feb 18, 2003·196 cites·17 claims
- 1896US6400753B1Pseudo-noise correlator for a GPS spread spectrum receiverSIRF TECH INC·Filed 2000·Granted Jun 4, 2002·86 cites·23 claims
- 1996US6041280AGPS car navigation systemSIRF TECH INC·Filed 1996·Granted Mar 21, 2000·224 cites·5 claims
- 2095US7236883B2Aiding in a satellite positioning systemSIRF TECH INC·Filed 2003·Granted Jun 26, 2007·171 cites·30 claims
- 2195US6952440B1Signal detector employing a Doppler phase correction systemSIRF TECH INC·Filed 2000·Granted Oct 4, 2005·93 cites·62 claims
- 2295US6900758B1System, method, apparatus and means for constructing building tomography and timing informationSIRF TECH INC·Filed 2002·Granted May 31, 2005·183 cites·15 claims
- 2395US6885940B2Navigation processing for a satellite positioning system receiverSIRF TECH INC·Filed 2003·Granted Apr 26, 2005·144 cites·20 claims
- 2495US6747596B2Generic satellite positioning system receivers with programmable inputsSIRF TECH INC·Filed 2002·Granted Jun 8, 2004·151 cites·19 claims
- 2595US6618670B1Resolving time ambiguity in GPS using over-determined navigation solutionSIRF TECH INC·Filed 2001·Granted Sep 9, 2003·165 cites·4 claims
- 2694US7760040B2Method of eliminating temperature induced band switching in ultra wideband voltage controlled oscillatorSIRF TECH INC·Filed 2007·Granted Jul 20, 2010·28 cites·24 claims
- 2794US6675003B1L1/L2 GPS receiverSIRF TECH INC·Filed 2000·Granted Jan 6, 2004·58 cites·30 claims
- 2894US6633814B2GPS system for navigating a vehicleSIRF TECH INC·Filed 2000·Granted Oct 14, 2003·57 cites·22 claims
- 2993US7756639B2System and method for augmenting a satellite-based navigation solutionSIRF TECH INC·Filed 2004·Granted Jul 13, 2010·113 cites·20 claims
- 3093US6931055B1Signal detector employing a doppler phase correction systemSIRF TECH INC·Filed 2000·Granted Aug 16, 2005·67 cites·58 claims
- 3193US6714158B1Method and system for data detection in a global positioning system satellite receiverSIRF TECH INC·Filed 2000·Granted Mar 30, 2004·54 cites·22 claims
- 3293US5901171ATriple multiplexing spread spectrum receiverSIRF TECH INC·Filed 1996·Granted May 4, 1999·163 cites·16 claims
- 3392US7642957B2GPS system utilizing multiple antennasSIRF TECH INC·Filed 2007·Granted Jan 5, 2010·29 cites·23 claims
- 3492US6917644B2Spread spectrum receiver with multi-path correctionSIRF TECH INC·Filed 2000·Granted Jul 12, 2005·58 cites·10 claims
- 3592US6684158B1Method for aiding a global positioning systemSIRF TECH INC·Filed 2002·Granted Jan 27, 2004·113 cites·1 claims
- 3692US6542823B2Information transfer in a multi-mode global positioning system used with wireless networksSIRF TECH INC·Filed 2002·Granted Apr 1, 2003·79 cites·19 claims
- 3792US6393046B1Spread spectrum receiver with multi-bit correlatorSIRF TECH INC·Filed 1997·Granted May 21, 2002·95 cites·68 claims
- 3891US7630737B2Method and system for sending location coded imagesSIRF TECH INC·Filed 2005·Granted Dec 8, 2009·34 cites·18 claims
- 3991US6917331B2Signal detector employing coherent integrationSIRF TECH INC·Filed 2003·Granted Jul 12, 2005·157 cites·34 claims
- 4091US6856794B1Monolithic GPS RF front end integrated circuitSIRF TECH INC·Filed 2001·Granted Feb 15, 2005·45 cites·21 claims
- 4191US6691066B1Measurement fault detectionSIRF TECH INC·Filed 2001·Granted Feb 10, 2004·78 cites·4 claims
- 4291US6662107B2Calibrated real time clock for acquisition of GPS signals during low power operationSIRF TECH INC·Filed 2001·Granted Dec 9, 2003·100 cites·17 claims
- 4391US6643587B2Navigation system and method for tracking the position of an objectSIRF TECH INC·Filed 2002·Granted Nov 4, 2003·87 cites·18 claims
- 4491US6519277B2Accelerated selection of a base station in a wireless communication systemSIRF TECH INC·Filed 2001·Granted Feb 11, 2003·43 cites·30 claims
- 4591US6466612B2Multipath processing for GPS receiversSIRF TECH INC·Filed 2001·Granted Oct 15, 2002·63 cites·20 claims
- 4691US6249542B1Multipath processing for GPS receiversSIRF TECH INC·Filed 1998·Granted Jun 19, 2001·77 cites·16 claims
- 4790US7076256B1Method and apparatus for transmitting position data using control channels in wireless networksSIRF TECH INC·Filed 2002·Granted Jul 11, 2006·59 cites·21 claims
- 4890US6961660B2Method and system for data detection in a global positioning system satellite receiverSIRF TECH INC·Filed 2004·Granted Nov 1, 2005·61 cites·1 claims
- 4990US6282231B1Strong signal cancellation to enhance processing of weak spread spectrum signalSIRF TECH INC·Filed 1999·Granted Aug 28, 2001·133 cites·17 claims
- 5090US5897605ASpread spectrum receiver with fast signal reacquisitionSIRF TECH INC·Filed 1996·Granted Apr 27, 1999·124 cites·11 claims
Showing the top 50 of 237 patent records by PatentIndex Score.
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