Patents by Inventor James J. Spilker, Jr.
James J. Spilker, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6879286Abstract: A method, apparatus, and computer-readable media for determining the position of a user terminal comprises receiving, at the user terminal, a broadcast analog television signal comprising a chirp-type signal; and generating a pseudorange based on the chirp-type signal; and wherein the location of the user terminal is determined based on the pseudorange and a location of a transmitter of the broadcast analog television signal.Type: GrantFiled: January 28, 2003Date of Patent: April 12, 2005Assignee: The Rosum CorporationInventors: Matthew Rabinowitz, James J. Spilker, Jr.
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Patent number: 6861984Abstract: A computer program product, apparatus, and method for determining the position of a user terminal. It includes receiving at the user terminal a plurality of digital television (DTV) broadcast signals from a plurality of DTV transmitters, determining a pseudo-range between the user terminal and each DTV transmitter based on the DTV broadcast signals, and determining a position of the user terminal based on the pseudo-ranges and a location of each of the DTV transmitters.Type: GrantFiled: July 31, 2002Date of Patent: March 1, 2005Assignee: Rosum CorporationInventors: Matthew Rabinowitz, James J. Spilker, Jr.
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Patent number: 6859173Abstract: A method, apparatus, and computer-readable media for determining the position of a user terminal comprises receiving at the user terminal a broadcast television signal from a television signal transmitter; determining a first pseudo-range between the user terminal and the television signal transmitter based on a known component of the broadcast television signal; receiving at the user terminal a mobile telephone signal from a mobile telephone base station; determining a second pseudo-range between the user terminal and the mobile telephone base station based on a known component of the mobile telephone signal; and determining a position of the user terminal based on the first and second pseudo-ranges, a location of the television signal transmitter, and a location of the mobile telephone base station; wherein the mobile telephone signal is selected from the group consisting of a EDGE (Enhanced Data Rates for Global System for Mobile Communications (GSM) Evolution) signal; a Code-Division Multiple Access 2000Type: GrantFiled: December 29, 2003Date of Patent: February 22, 2005Assignee: The Rosum CorporationInventors: James J. Spilker, Jr., Jimmy K. Omura, Matthew Rabinowitz
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Patent number: 6839024Abstract: An apparatus, method, and computer-readable media comprise a receiver adapted to receive a plurality of broadcast signals; a signal processor adapted to determine a position based on the received plurality of broadcast signals; a signal generator adapted to generate a ranging signal comprising a known component of a television signal; and a transmitter adapted to broadcast a signal comprising the ranging signal and a position signal comprising a description of the position.Type: GrantFiled: January 31, 2003Date of Patent: January 4, 2005Assignee: Rosum CorporationInventors: James J. Spilker, Jr., Matthew Rabinowitz
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Patent number: 6753812Abstract: A computer program product, apparatus, and method for use in determining the position of a user terminal includes receiving at the user terminal a digital television (DTV) broadcast signal transmitted by a DTV transmitter; tracking a periodic component of the DTV signal using a delay-lock loop (DLL), including selecting an observation interval based on the timing of the periodic component, and turning on a portion of the DLL during the observation interval, and turning the portion off otherwise; and determining a pseudo-range between the user terminal and the DTV transmitter based on the DTV broadcast signal; and wherein the position of the user terminal is determined based on the pseudo-range and a location of the DTV transmitter.Type: GrantFiled: July 31, 2002Date of Patent: June 22, 2004Assignee: Rosum CorporationInventors: Matthew Rabinowitz, James J. Spilker, Jr.
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Patent number: 6727847Abstract: A method, apparatus, and computer-readable media for providing satellite positioning system aiding information to a satellite positioning system receiver configured to determine the position of the satellite positioning system receiver using the satellite positioning system aiding information and the propagation time of a signal transmitted by a satellite in the satellite positioning system comprises providing the satellite positioning system aiding information; providing a digital television signal comprising a plurality of frames, each frame comprising a plurality of data segments; encoding the satellite positioning system aiding information as codewords; replacing data segments within the digital television signal with the codewords; and transmitting the digital television signal; wherein the satellite positioning system receiver receives the digital television signal and recovers the satellite positioning system aiding information.Type: GrantFiled: November 12, 2002Date of Patent: April 27, 2004Assignee: Rosum CorporationInventors: Matthew Rabinowitz, James J. Spilker, Jr., Jimmy K. Omura, Matthew D. Pierce
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Patent number: 6717547Abstract: A method, apparatus, and computer-readable media for determining the position of a user terminal comprises receiving at the user terminal a broadcast television signal from a television signal transmitter; determining a first pseudo-range between the user terminal and the television signal transmitter based on a known component of the broadcast television signal; receiving at the user terminal a mobile telephone signal from a mobile telephone base station; determining a second pseudo-range between the user terminal and the mobile telephone base station based on a known component of the mobile telephone signal; and determining a position of the user terminal based on the first and second pseudo-ranges, a location of the television signal transmitter, and a location of the mobile telephone base station.Type: GrantFiled: August 29, 2002Date of Patent: April 6, 2004Assignee: Rosum CorporationInventors: James J. Spilker, Jr., Jimmy K. Omura, Matthew Rabinowitz
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Patent number: 6559800Abstract: A computer program product, apparatus, and method for determining the position of a user terminal. It includes receiving, at the user terminal, a broadcast analog television signal having a periodic component; and correlating the broadcast analog television signal with a predetermined reference signal based on the periodic component, thereby producing a pseudorange; and wherein the location of the user terminal is determined based on the pseudorange and a location of the transmitter of the broadcast analog television signal.Type: GrantFiled: January 22, 2002Date of Patent: May 6, 2003Assignee: Rosum CorporationInventors: Matthew Rabinowitz, James J. Spilker, Jr.
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Patent number: 6522297Abstract: A method, apparatus, and computer-readable media for determining the position of a user terminal comprises generating a correlation reference signal based on known characteristics of a chirp-type signal present in a broadcast analog television signal; receiving, at the user terminal, a broadcast analog television signal comprising the chirp-type signal; and correlating the broadcast analog television signal with the correlation reference signal, thereby producing a pseudorange; and wherein the location of the user terminal is determined based on the pseudorange and a location of the transmitter of the broadcast analog television signal.Type: GrantFiled: May 31, 2002Date of Patent: February 18, 2003Assignee: Rosum CorporationInventors: Matthew Rabinowitz, James J. Spilker, Jr.
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Patent number: 6058135Abstract: A receiver for tracking and acquisition of the split spectrum PN GPS C/A signal constellation from an earth-orbiting satellite for radiolocation includes an RF front end for receiving and downconverting the split spectrum PN GPS C/A signals from the earth-orbiting satellite to an IF signal. The total power in the split spectrum PN GPS C/A signal is compressed and the compressed split spectrum PN GPS C/A signals are supplied to a utilization device.Type: GrantFiled: February 17, 1999Date of Patent: May 2, 2000Assignee: Stanford Telecommunications, Inc.Inventor: James J. Spilker, Jr.
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Patent number: 6044071Abstract: A system for providing a signal structure for code-division multiplexed radio positioning comprises a coherent signal source from which carrier frequency and all lower frequencies used in code definition are derived through frequency synthesis. A radio frequency (RF) carrier approximately centered in the available band is provided.Type: GrantFiled: November 20, 1997Date of Patent: March 28, 2000Assignee: Stanford Telecommunications, Inc.Inventor: James J. Spilker, Jr.
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Patent number: 5815046Abstract: A tunable digital modulator is tunable across an R.F. frequency range for transmission without additional frequency conversion and includes two toggled multiplexed analog-to-digital converters for reducing spurious frequency components in the output. The modulator and digital-to-analog converters are fabricated in a single integrated circuit with the two converters laid out physically in adjacent spaces with their gain and voltage characteristics matched. By alternating the two digital-to-analog converters in producing the analog modulated signal output, transients from switching of the converters have a chance to die out before the output of each converter is sampled. Thus, any spurious glitch energy is greatly attenuated.Type: GrantFiled: February 11, 1997Date of Patent: September 29, 1998Assignee: Stanford TelecomInventors: James J. Spilker, Jr., James D. McVey
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Patent number: 5398034Abstract: A position, time location receiving system deriving its output position estimates from received inputs from a distributed array of pseudonoise multiplexed transmitter channels at determinable spatial positions. The receiving system has a plurality of delay lock loops, one for each transmitter channel. Control signals for the delay lock loops of each transmitter channel are derived from a current estimated location vector (x, y, z) and time.Type: GrantFiled: March 29, 1993Date of Patent: March 14, 1995Assignee: Stanford Telecommunications, Inc.Inventor: James J. Spilker, Jr.
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Patent number: 4363130Abstract: 1. A binary digital communication system comprising a transmitter and receiver: said transmitter comprising means for alternately radiating in response to the digits of a binary message two signals of non-periodic energy which have been delayed by a predetermined amount with respect to one another, and means for phase shifting one of said signals by 180.degree. prior to radiation thereof in response to one of the "0" and "1" digits of the binary message; said receiver comprising means for receiving the signals alternately radiated by said transmitter, means for delaying the alternately received signals with respect to one another so they are brought back into correlation, and correlation-sensitive means to which the correlated received signals are fed, the output of said correlation-sensitive means being representative of said binary message.Type: GrantFiled: March 18, 1960Date of Patent: December 7, 1982Assignee: Lockheed Missiles & Space Company, Inc.Inventors: William R. Ramsay, James J. Spilker, Jr.
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Patent number: 4326292Abstract: 5. An intelligence communication system comprising a transmitter and a receiver; said transmitter comprising means for obtaining a relatively wide band random energy carrier signal, means for modulating said random carrier signal with an intelligence signal thereby forming a message signal, means responsive to said wide band energy obtaining means for deriving a reference signal which differs in frequency with said message signal by a definite fixed amount and means for radiating to the receiverr both the message and reference random signals; said receiver comprising an antenna for picking up both the message and reference random signal simultaneously, means for operating on at least one of said message and reference random signals to obtain message and reference random signals which are recombined and mixer means for multiplying the recombined message and reference random signals to obtain a resultant signal from which the intelligence signal can be derived.Type: GrantFiled: March 18, 1960Date of Patent: April 20, 1982Assignee: Lockheed Missiles & Space Company, Inc.Inventors: James J. Spilker, Jr., William R. Ramsay