GPS & Satellite Navigation Patents

© Brooke Clarke, N6GCE



3453624  SYSTEM FOR DETERMINING CRAFT POSITION

3630079 Navigation Method and Apparatus Utilizing Multiple Sensors, J.M. Hughes (TI), Dec 21 1971, -
3702477 Inertial Doppler Satellite Navigation System, R.G. Brown (UoIowa), Nov 7 1972, -


3769585  Method and Aparatus for Earth-Space Range Measurements Employing Correction for Ionospheric Group Delay Oct. 30, 1973 342/386; 324/76.52; 324/76.54; 370/252; 455/67.16 (SRI)
3941984
4030100 Multipurpose submarine antenna 343/709; 343/725; 343/895
4114155 Position determining apparatus and method 342/394
4318063 Crystal oscillator compensated for g-sensitivity 331/158; 331/116R
4329690 Multiple shipboard antenna configuration 343/709; 343/725; 343/885
4335433 Method for correcting navigation errors due to water currents June 15, 1982 701/200; 73/178R; 701/217 (sec of Navy)
4359733 Satellite-based vehicle position determining system 342/36; 342/44; 342/357.01; 342/456; 701/207
438429 Apparatus and method for providing pointing information 342/352; 89/41.03; 89/41.19
4426712 Correlation system for global position receiver 375/343; 370/515; 375/367
4445118 Navigation system and method 342/357.09; 342/356
4457006 Global positioning system receiver 375/333; 375/344; 455/264; 455/316 - designed for microprocessor use
4463357 Method and apparatus for calibrating the ionosphere and application to surveillance of geophysical events 342/460; 342/26; 342/352
4468793 Global position system (GPS) multiplexed receiver August 28, 1984 375/344; 342/357.12; 342/418; 375/326 (TI)
4485383 Global position system (GPS) multiplexed receiver 342/352; 370/324; 375/365 - L1 L2 mux while maintaining lock on each SV
4532637 Differential receiver 375/226; 324/76.79; 342/394; 375/373
4559613 Digital frequency synthesizer circuit 708/103; 377/48 - p-code circuit
4575861 Quadrature multiplexed post correlation IF channel 375/343; 375/327; 375/367
4578678 High dynamic global positioning system receiver March 25, 1986 342/357.12; 342/418 (U.S.A.)
4599620 Method for determining the orientation of a moving platform 342/357.11; 701/4; 701/21; 701/213; 702/150
4613977 Digital Navstar receiver 375/344; 342/420; 375/326; 375/367; 375/371
4660048 Microstrip patch antenna system 343/700MS; 343/830

4667203 Method and system for determining position using signals from satellites May 19, 1987 342/357.06; 342/357.08; 342/357.12; 342/418; 342/429; 342/450Counselman, III; Charles C.(Aero Service Div, Western Geophysical) - surveying use of GPS
4701934 Method of doppler searching in a digital GPS receiver 375/147; 342/357.15; 342/418; 702/77
Motorola uses FFT for processing GPS signals. Searches code delay and doppler space much faster than prior receivers reducing cold start time.

Referenced by:
1 6577271 Signal detector employing coherent integration
2 6560536 System and method for rapid telepositioning
3 6542823 Information transfer in a multi-mode global positioning system used with wireless networks
4 6542821 GPS receiver and method for processing GPS signals
5 6531982 Field unit for use in a GPS system
6 6526322 Shared memory architecture in GPS signal processing
7 6519466 Multi-mode global positioning system for use with wireless networks
8 6519277 Accelerated selection of a base station in a wireless communication system
9 6512479 Signal acquisition using data bit information
10 6496145 Signal detector employing coherent integration
11 6480788 System and method for fast acquisition reporting using communication satellite range measurement
12 6480150 Autonomous hardwired tracking loop coprocessor for GPS and WAAS receiver
13 6466161 Location services system that reduces auto-correlation or cross-correlation in weak signals
14 6462708 GPS-based positioning system for mobile GPS terminals
15 6448925 Jamming detection and blanking for GPS receivers
16 6437739 Methods and systems for monitoring multiple channels in a very high frequency omni-directional range receiver
17 6421002 GPS receiver utilizing a communication link
18 6407699 Method and device for rapidly extracting time and frequency parameters from high dynamic direct sequence spread spectrum radio signals under interference
19 6400314 GPS receiver utilizing a communication link
20 6389291 Multi-mode global positioning system for use with wireless networks
21 6348744 Integrated power management module
22 6347113 Global positioning system receiver for monitoring the satellite transmissions and for reducing the effects of multipath error
23 6327473 Method and apparatus for increasing the sensitivity of a global positioning satellite receiver
24 6327471 Method and an apparatus for positioning system assisted cellular radiotelephone handoff and dropoff
25 6307504 Method and system for using altitude information in a satellite positioning system
26 6304216 Signal detector employing correlation analysis of non-uniform and disjoint sample segments
27 6282231 Strong signal cancellation to enhance processing of weak spread spectrum signal
28 6278403 Autonomous hardwired tracking loop coprocessor for GPS and WAAS receiver
29 6272430 GPS receiver and method for processing GPS signals
30 6259720 Versatile digital signal processing system
31 6259399 GPS receivers and garments containing GPS receivers and methods for using these GPS receivers
32 6236845 System and method for radio signal reconstruction using signal processor
33 6236673 Receiver for receiving signals of a statellite nagivation system
34 6236354 Reducing satellite signal interference in a global positioning system receiver
35 6208290 GPS receiver utilizing a communication link
36 6185427 Distributed satellite position system processing and application network
37 6169514 Low-power satellite-based geopositioning system
38 6154171 Low-power satellite-based geopositioning system
39 6147642 Method and apparatus for limiting access to satellite communication signals
40 6141372 Digital downconverter/despreader for direct sequence spread spectrum CDMA communications system
41 6133873 Method and apparatus for adaptively processing GPS signals in a GPS receiver
42 6133871 GPS receiver having power management
43 6111540 Combined GPS positioning system and communications system utilizing shared circuitry
44 6104340 GPS receiver and method for processing GPS signals
45 6094162 Low-power satellite-based geopositioning system
46 6075987 Stand alone global positioning system (GPS) and method with high sensitivity
47 6064336 GPS receiver utilizing a communication link
48 6061018 Method and system for using altitude information in a satellite positioning system
49 6049720 Link delay calculation and compensation system
50 6016119 Method and apparatus for determining the location of an object which may have an obstructed view of the sky

51 6005889 Pseudo-random noise detector for signals having a carrier frequency offset
52 6002363 Combined GPS positioning system and communications system utilizing shared circuitry
53 5978411 Synchronizer for receiver of spread spectrum communication apparatus
54 5953649 Signal acquisition in a satellite telephone system
55 5884214 GPS receiver and method for processing GPS signals
56 5874914 GPS receiver utilizing a communication link
57 5864754 System and method for radio signal reconstruction using signal processor
58 5841396 GPS receiver utilizing a communication link
59 5831574 Method and apparatus for determining the location of an object which may have an obstructed view of the sky
60 5825327 GPS receivers and garments containing GPS receivers and methods for using these GPS receivers
61 5805200 System for determining position from pseudorandomly modulated radio signals
62 5781156 GPS receiver and method for processing GPS signals
63 5696797 Demodulator with baseband doppler shift compensation and method
64 5692014 Subsampled carrier recovery for high data rate demodulators
65 5663734 GPS receiver and method for processing GPS signals
66 5630218 Radio receiving device for measuring an electric field level of a receiving channel and adjacent channels using common components
67 5535278 Global positioning system (GPS) receiver for recovery and tracking of signals modulated with P-code
68 5530452 Method of synchronizing spread spectrum radio transmitters
69 5526389 Spread spectrum open loop data recovery processor
70 5519718 Remote unit for use with remote pager
71 5499266 Low-power frequency-hopped spread spectrum acknowledgement paging system
72 5461921 Direct-sequence spread-spectrum ultrasonic testing device
73 5459473 GPS receiver
74 5450612 Communication system for communicating with a plurality of selective call receivers and method therefor
75 5430759 Low-power frequency-hopped spread spectrum reverse paging system
76 5418843 Method for estimating traffic density in mobile telephone networks
77 5418538 Rapid satellite signal acquisition in a satellite positioning system
78 5347284 System and method for a digital navigation satellite receiver
79 5335246 Pager with reverse paging facility
80 5271034 System and method for receiving and decoding global positioning satellite signals
81 5265121 Spread spectrum coherent processor
82 5223843 High performance global positioning system receiver means and method
83 5185761 GPS receiver
84 4841545 Synchronous tracking device for direct spread spectrum receiver
85 4841544 Digital direct sequence spread spectrum receiver
86 4821294 Digital signal processor and processing method for GPS receivers
87 4800577 GPS receiver
88 4748636 Method and apparatus of transmitting image data in a satellite system
89 4972431 P-code-aided global positioning system receiver
90 4972430 Spread spectrum signal detector
91 4965757 Process and device for decoding a code signal
92 4959656 Efficient detection and signal parameter estimation with application to high dynamic GPS receiver
93 4926130 Synchronous up-conversion direct digital synthesizer
94 4905177 High resolution phase to sine amplitude conversion
95 4903279 Receiver for spread spectrum communication and receiving method for the same
96 4894842 Precorrelation digital spread spectrum receiver
97 4879726 Spread spectrum communications system

Calls:
4313197 Jan., 1982 Maxemchuk 370/23.
4412325 Oct., 1983 Molo 370/23.
4453165 Jun., 1984 Maine 343/418.
4457006 Jun., 1984 Maine 375/97.
4494238 Jan., 1985 Groth, Jr. 375/1.
4711152 Apparatus for transmititng data to a projectile positioned within a gun tube 89/6.5
4754465 Global positioning system course acquisition code receiver 375/376; 455/3.02; 455/13.2 - Trimble Navigation oldest patent
calls:
3681697 Aug., 1972 Moroney 455/302.
4203070 May., 1980 Bowles et al. 375/115.
4232395 Nov., 1980 Yokogawa 455/173.
4247939 Jan., 1981 Stromswold et al. 375/1.
4384357 May., 1983 de Buda et al. 455/208.
4429418 Jan., 1984 Hooper 455/314.
4485477 Nov., 1984 Nossen 375/1.
4530103 Jul., 1985 Mosley, Jr. et al. 375/1.
4531236 Jul., 1985 Ishihara 455/330.
Called By:
1 6577271 Signal detector employing coherent integration
2 6574558 GPS receiver with cross-track hold
3 6542823 Information transfer in a multi-mode global positioning system used with wireless networks
4 6531982 Field unit for use in a GPS system
5 6526322 Shared memory architecture in GPS signal processing
6 6522682 Triple multiplexing spread spectrum receiver
7 6519466 Multi-mode global positioning system for use with wireless networks
8 6519277 Accelerated selection of a base station in a wireless communication system
9 6496145 Signal detector employing coherent integration
10 6493378 Methods and apparatuses for reducing multipath errors in the demodulation of pseudo-random coded signals
11 6480150 Autonomous hardwired tracking loop coprocessor for GPS and WAAS receiver
12 6466612 Multipath processing for GPS receivers
13 6466161 Location services system that reduces auto-correlation or cross-correlation in weak signals
14 6463091 Spread spectrum receiver using a pseudo-random noise code for ranging applications in a way that reduces errors when a multipath signal is present
15 6462708 GPS-based positioning system for mobile GPS terminals
16 6448925 Jamming detection and blanking for GPS receivers
17 6421609 GPS receiver with cross-track hold
18 6400753 Pseudo-noise correlator for a GPS spread spectrum receiver
19 6393046 Spread spectrum receiver with multi-bit correlator
20 6389291 Multi-mode global positioning system for use with wireless networks
21 6348744 Integrated power management module
22 6327471 Method and an apparatus for positioning system assisted cellular radiotelephone handoff and dropoff
23 6307439 Voltage controlled oscillator with adaptive closed loop coarse tune
24 6304216 Signal detector employing correlation analysis of non-uniform and disjoint sample segments
25 6295449 Data messaging in a communications network using a feature request
26 6292749 GPS receiver with cross-track hold
27 6282231 Strong signal cancellation to enhance processing of weak spread spectrum signal
28 6278403 Autonomous hardwired tracking loop coprocessor for GPS and WAAS receiver
29 6259401 Global positioning system receiver with improved multipath signal rejection
30 RE37256 System and method for generating precise position determinations
31 6249542 Multipath processing for GPS receivers
32 6240295 Data messaging in a communications network using a feature request
33 6236937 GPS receiver with cross-track hold
34 6198765 Spread spectrum receiver with multi-path correction
35 6188956 Navigation device and method for selectively displaying thoroughfare names
36 6148202 Vehicle locating and communicating method and apparatus
37 6125325 GPS receiver with cross-track hold
38 6088635 Railroad vehicle accident video recorder
39 6084484 Programmable precise frequency divider
40 6076039 Navigation device and method for displaying cartographic markers
41 6061558 Method and apparatus for a nation-wide cellular telephone network
42 6047017 Spread spectrum receiver with multi-path cancellation
43 6046687 Clandsetine location reporting for missing vehicles
44 6041280 GPS car navigation system
45 6040798 Satellite radiodetermination
46 6018784 PCI card for receiving a GPS signal
47 6018704 GPS receiver
48 6009330 Method and apparatus for call delivery to a mobile unit
49 5995818 Low noise block downconverter
50 5987377 Method and apparatus for determining expected time of arrival
51 5983108 Method and apparatus for a nation-wide cellular telephone network
52 5970481 Method and apparatus for determining tax of a vehicle
53 5963582 Mitigation of multipath effects in global positioning system receivers
54 5953367 Spread spectrum receiver using a pseudo-random noise code for ranging applications in a way that reduces errors when a multipath signal is present
55 5913170 Locating system and method using a mobile communications network
56 5901171 Triple multiplexing spread spectrum receiver
57 5897605 Spread spectrum receiver with fast signal reacquisition
58 5884221 Vehicle locating and communicating method and apparatus
59 5832394 Vehicle locating and communicating method and apparatus
60 5815539 Signal timing synchronizer
61 5812591 Dual conversion GPS frequency converter and frequency plan for same
62 5809064 Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
63 5808582 Global positioning system receiver with improved multipath signal rejection
64 5771455 Data messaging in a communications network using a feature request
65 5734981 Method and apparatus for call delivery to a mobile unit
66 5724243 Method and apparatus for determining expected time of arrival
67 5699275 System and method for remote patching of operating code located in a mobile unit
68 5694322 Method and apparatus for determining tax of a vehicle
69 5689245 Integrated communications terminal
70 5652707 Vehicle locating and communicating method and apparatus
71 5583513 System and method for generating precise code based and carrier phase position determinations
72 5579376 Phantom mobile-identification number method and apparatus
73 5572218 System and method for generating precise position determinations
74 5564098 Ultra low-power integrated circuit for pseudo-baseband down-conversion of GPS RF signals
75 5548293 System and method for generating attitude determinations using GPS
76 5544225 Data messaging in a cellular communications network
77 5539810 Data messaging in a communications network
78 5519760 Cellular network-based location system
79 5519621 Vehicle locating and communicating method and apparatus
80 5513111 Vehicle locating and communicating method and apparatus
81 5495499 Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
82 5455823 Integrated communications terminal
83 5422813 No-outage GPS/commercial RF positioning system
84 5414729 Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time delay spacing
85 5398190 Vehicle locating and communicating method and apparatus
86 5390207 Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
87 5343210 Satellite radionavigation receiver
88 5343209 Navigation receiver with coupled signal-tracking channels
89 5313491 Acquisition method for DSSS communications
90 5313490 Acquisition apparatus for DSSS communications
91 5303393 Integrated radio satellite response system and method
92 5299132 Vehicle locating and communicating method and apparatus using cellular telephone network
93 5223843 High performance global positioning system receiver means and method
94 5192957 Sequencer for a shared channel global positioning system receiver
95 5155491 Satellite radio signal tracking method for GPS receivers
96 5148452 Global positioning system digital receiver
97 5101416 Multi-channel digital receiver for global positioning system
98 5068872 Apparatus and method for short cycling sequences of a p-code generator
99 5008898 Carrier modulating device for a spread spectrum communication device
100 4998263 Generation of trigger signals
101 4933916 Phase measurements using pseudo-random code
102 4862178 Digital system for codeless phase measurement
103 4847862 Global positioning system course acquisition code receiver

4807256 Global position system receiver February 21, 1989375/344; 342/357.12 (TI)
4847862 Global positioning system course acquisition code receiver 375/376; 370/317
5108334 Dual down conversion GPS receiver with single local oscillator  April 28, 1992 455/314; 331/22; 455/318
5202694 P-code generation April 13, 1993 342/357.12; 380/46; 708/250
5663735 GPS receiver using a radio signal for improving time to first fix September 2, 1997 Trimble

Multipath Reduction

6278407 Dual-frequency choke-ring ground planes, Javad Ashjaee (Topcon Positioning Systems), Aug 21, 200, 343/700MS ; 343/785; 343/848
Calls:
3434146 Low Profile Open-ended Waveguide Antenna with Dielectric Disc Lens, Louis G. Petrich (Army), Mar 18 1969, 343/753 ; 343/772; 343/783; 343/785
used on the Nike missile to provide an isotropic X-band antenna
Calls:
2742640 Aerial Systems, D.E. Cronin (GE), Apr 17 1956, 343/772
Calls:
2322971Shielded Antenna Feeder or Line, H.O. Roosenstein (), Jun 29 1843, 333/12 ; 174/28; 174/36; 333/207; 333/243
has 1/4 wave sections of coax coaxial with the normal coax line
2407068 Wave Transmetting System, M.D. Fiske (GE), - waveguide termination to act as antenna
2451876 Radio Frequency Joint, W.W. Salisbury (Navy), -
Chokes applied to coax and waveguide to get low impedance connection including rotary joints and flanges
2459768 Apparatus for Radiation or Reception of Electromagnetic Waves, E.C. Cork (GB), uses 1/4 wave choke to block exterior currents
2549783 Antenna, L.A. DeRosa (Fed Tel & Radio), Apr 24 1951, - slot antenna
2557951 Antenna System, L.A. DeRosa (Fed Tel & Radio), Jun 26 1951, - slot antennas
2584399 Rotatable Waveguide Joint, W.M. Preston (Navy), - choke ring flanges
2597143 Wave Guide Joint, W.A. Aron (Navy), - circular choke that's not a full circle
talks about choke to flange and choke to choke waveguide joints and the off center frequency reasonances of choke to choke joints
Calls:
2451876 <see above>
2476621Cavity Joint, E.C. Okress (Westinghouse), July 19 1949 - choke flange to replace threaded or soldered joints
2921309 Surface Wave Omnidirectional Antenna, R.S. elliott (Hughes), Jan 1960,
References:
"An Annular Corrugated-surface Antenna", by E.M.T. Jones, Proceedings of the I.R.E, Vol 40, Nbr. 6 June 1952
2761138 Isotropic Radiator, D.R. Sherman (Navy), - uses circular polarization to achieve both horizontal and vertical polarization at the same time

Counselman GPS Patents

5194871 System for simultaneously deriving position information from a plurality of satellite transmissions
5014066 System for simultaneously deriving position information from a plurality of satellite transmissions
4894662 Method and system for determining position on a moving platform, such as a ship, using signals from GPS satellites
4870422 Method and system for determining position from signals from satellites
4809005 Multi-antenna gas receiver for seismic survey vessels
4667203 Method and system for determining position using signals from satellites
4647942 Circularly polarized antenna for satellite positioning systems

Differential Corrections Inc

5477228 Differential global positioning system using radio data system, (Differential Corrections Inc.) 342/357.03 ; 455/12.1
Calls:
4751512 Differential navigation system for remote mobile users (Oceanonics, Inc.), Jun 14, 1988
5311194 GPS precision approach and landing system for aircraft (NAVSYS Corp), May 10, 1994
5323322 Networked differential GPS system (Trimble), Jun 21, 1994
Calls:
4646096 Enhanced global positioning system Delta-Range processing (Litton Sys), Feb 24, 1987
4751512 Differential navigation system for remote mobile users (Oceanonics) Jun 14, 1988
4797677 Method and apparatus for deriving pseudo range from earth-orbiting satellites (Istac, Inc) Jan 10, 1989
5155490 Geodetic surveying system using multiple GPS base stations (GPS Technology Corp) Oct 13, 1992
5202829 Exploration system and method for high-accuracy and high-confidence level relative position and velocity determinations (Trimble) Apr 13, 1993
5225842 Vehicle tracking system employing global positioning system (GPS) satellites (NAVSYS Corp) Jul 6, 1993

Magnavox, Torrance, CA Patents  

5177489 Pseudolite-aided method for precision kinematic positioning
5072227 Method and apparatus for precision attitude determination
4972431 P-code-aided global positioning system receiver 375/150; 342/357.12; 380/258
4963889 Method and apparatus for precision attitude determination and kinematic positioning
4384293 Apparatus and method for providing pointing information
3475558
Time Gated Pseudonoise Multiplexing System Oct. 28, 1969 370/312; 370/335; 375/142; 375/145; 375/149; 375/150 - PN CDMA

Trimble Navigation Patents

There are 505 as of 31 July 2003. Not all are directly GPS, but realted.
5640452 Location-sensitive decryption of an encrypted message, Michael D. Murphy (trimble), Jun 17, 1997, 380/5; 380/20 - Direct Broadcast TV application

Motorola GPS patents

There are 375 as of 31 July 2003

SiRF Technology GPS patents

There are 38 as of 31 July, 2003.

contain Conexant:
6636178 Signal detector employing correlation analysis of non-uniform and disjoint ...
6496145 Signal detector employing coherent integration
6850557 Signal detector and method employing a coherent accumulation system to ...
6917331 Signal detector employing coherent integration
6952440 Signal detector employing a Doppler phase correction system
6931055 Signal detector employing a doppler phase correction system
7002516 Signal detector employing correlation analysis of non-uniform and disjoint ...
10151471 System and method for receiving digital satellite radio and GPS

Rockwell Collins

contain Conexant:
6067503 Method and apparatus for compensating unexpected frequency shifts in Positioning Receivers - sense temperature and shock to allow faster recovery

Conexant

5920283 Receiver engine for global positioning system - aimed at embedding GPS into App (cell phone, game, etc)
6114992 Satellite acquisition and measurement system and process - method of reducing the size of the acquisition search space for doppler based on a prior lock
6031302 Battery management system with current measurement across on-resistance of semiconductor Cutout Switch - uses the On resistance of a MOSFET switch instead of sense resistor
6327471 Method and an apparatus for positioning system assisted cellular radiotelephone handoff and dropoff -
6100670 Multi-functional battery management module operable in a charging mode and a ...
6348744 Integrated power management module
6385460 Power management system for a mobile unit by reduced neighbor cell scanning
6044105 Doppler corrected spread spectrum matched filter - faster and less power
6412081 System and method for providing a trap and patch function to low power, cost ... - a way of patching errors in a ROM by providing a alternate memory such as EEPROM
6448925 Jamming detection and blanking for GPS receivers methods of detecting jamming based on changed in correlator output changes (Why Conexant?)
6208844 System and process for shared functional block communication transceivers ...
6304216 Signal detector employing correlation analysis of non-uniform and disjoint ...
6628605 Method and apparatus for efficiently transmitting multiple data signals
6297771 Signal detector employing coherent integration
9728351 Phase noise tracker with a delayed rotator
7028134 Crossbar integrated circuit with parallel channels for a communication device
6484096 Wireless vehicle monitoring system (Satellite Devices Limited)
6484095 Vehicle operation and position recording system incorporating GPS (Satellite Devices Limited)
6665611 System for discovering and maintaining geographic location information in a ... (Cisco)
7206323 Interfacing 622.08 MHz line interface to a 77.76 MHz SONET framer
11035065 Power management for wireless direct link
11695838 Minimum processor instruction for implementing weighted fair queuing and ...


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