Patents by Inventor Naofal Mohammed Wassel Al-Dhahir
Naofal Mohammed Wassel Al-Dhahir 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: 6781513Abstract: A telemeter for telemetry of diagnostic messages from a mobile asset to a remote station comprises a processor coupled to the output of one or more condition sensors. The processor converts the output of the condition sensors to a diagnostic message, and provides the diagnostic message at a processor output. A transmitter is coupled to the processor output. The transmitter is adapted to transmit the diagnostic messages in the Industrial, Scientific, Medical (ISM) frequency band. An exemplary embodiment of a telemetry system of the invention comprises a telemeter adapted to transmit diagnostic messages in the ISM frequency band, and a remote station including a receiver for receiving the diagnostic messages in the ISM band.Type: GrantFiled: April 28, 2000Date of Patent: August 24, 2004Assignee: General Electric CompanyInventors: Richard August Korkosz, John Erik Hershey, William Robert McKinney, Sr., Bruce Gunter Schings, Harold Woodruff Tomlinson, Jr., Charles McDonald Puckette, Naofal Mohammed Wassel Al-Dhahir, John Anderson Fergus Ross
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Patent number: 6668012Abstract: A receiver for a unique word sequence or a spreading code sequence includes a memory which is preloaded with all possible phases of the code. The sequence in the received signal is correlated, in parallel, with sums of various ones of the different phases of the code. Thus, the received code is correlated with all possible phases of a replica of its own code. Consequently, one of the sums will exhibit a correlation peak, which indicates that the desired phase of the code is included in that particular sum. The other sums will not exhibit a correlation peak, and are is discarded. The different phases in the one sum which displayed correlation are divided into new sums, each having fewer phases, and the correlation is again performed. Again, those sums exhibiting no correlation are discarded, and the sum exhibiting correlation is divided into sums of fewer codes.Type: GrantFiled: July 15, 1999Date of Patent: December 23, 2003Assignee: Lockheed Martin CorporationInventors: John Erik Hershey, Richard August Korkosz, Gary Jude Saulnier, Naofal Mohammed Wassel Al-Dhahir
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Publication number: 20030179810Abstract: The present invention is a coder for encoding and decoding a digital baseband signal in spread spectrum communication system such that the phase integrity of the carrier inversions is preserved. The coder comprises an encoder and a decoder. The encoder includes an exclusive “or” logic unit and a delay unit. The exclusive “or” logic unit includes a first input for receiving the baseband digital signal to be encoded. The one bit delay unit includes an input coupled to the output of the exclusive “or” logic unit. The one bit delay unit further includes an output coupled to a second input of the exclusive “or” logic unit. The undelayed output of the exclusive “or” logic unit provides the encoded digital baseband signal. The encoded digital baseband signal is utilized to modulate a spread spectrum carrier signal.Type: ApplicationFiled: July 6, 1999Publication date: September 25, 2003Inventors: JOHN ERIK HERSHEY, GARY JUDE SAULNIER, RICHARD AUGUST KORKOSZ, KENNETH BARKELEY WELLES, RICHARD CHARLES GUAS, NAOFAL MOHAMMED WASSEL AL-DHAHIR
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Patent number: 6621855Abstract: A method allows determination of the presence of, the frequency of, and or the timing of a coded signal distributed in time, as for example a direct-sequence spread-spectrum signal or a signal having a coded header. According to the method, the received signal is correlated (16, 216, 316) with small sections of the spreading or header code, to produce partial correlations, as for example a 1024-chip spreading code is correlated in eight- or sixteen-chip portions. The result of each partial correlation is delayed (32, 232, 332/350) by an amount which results in temporal congruence or simultaneous occurrence of the partial correlations at a Doppler processor. The processor processes the simultaneous partial correlations, to produce signals which recur in the appropriate frequency bin at the recurrence rate of the spreading code. The frequency bin identifies the frequency of the received signals, and the time of the appearance of the signals at the bins is indicative of the time.Type: GrantFiled: May 26, 1999Date of Patent: September 16, 2003Assignee: Lockhead Martin CorporationInventors: Nick Andrew Van Stralen, Richard August Korkosz, Gary Jude Saulnier, John Erik Hershey, Naofal Mohammed Wassel Al-Dhahir
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Patent number: 6542536Abstract: A spread spectrum communications system that is operable to provide user-selectable data transfer rates comprises a user station for generating an access request and a gateway server for receiving the access request. The gateway server includes a rate unit for comparing a requested rate to assigned rates, a selector for selecting an available user channel and an available signaling alphabet, and an allocation unit for assigning the carrier, user channel, and alphabet to the access request. One of several offered transfer rates is assigned to the available user channel. Each offered rate corresponds to a set of signaling alphabets with low cross-correlation for data transfer.Type: GrantFiled: November 16, 1999Date of Patent: April 1, 2003Assignee: General Electric CompanyInventors: John Erik Hershey, John Anderson Fergus Ross, Naofal Mohammed Wassel Al-Dhahir, Mark Lewis Grabb, Michael James Hartman, Richard Louis Frey, John Anthony Esposito, Roy Marion LaRosa
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Patent number: 6426720Abstract: A system for directing a receiving lobe of an adaptive antenna array toward an aircraft in flight includes an aircraft position vector calculator and an antenna weight vector generator. The aircraft position vector calculator receives aircraft position information from an aircraft tracking service and calculates, based upon the aircraft position information it receives, an aircraft position vector g. An antenna weight vector generator receives the aircraft position vector g from the aircraft position vector calculator and generates, based upon the aircraft position vector g, an antenna element weight vector w. The antenna weight vector w is applied to the elements of an adaptive antenna array to direct a receiving lobe of the array towards an aircraft in flight.Type: GrantFiled: April 3, 2000Date of Patent: July 30, 2002Assignee: General Electric CompanyInventors: John Anderson Fergus Ross, John Erik Hershey, Richard August Korkosz, Naofal Mohammed Wassel Al-Dhahir, William Robert McKinney, Bruce Gunter Schings
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Patent number: 6304299Abstract: A wide-band overlay sequence generator adds an overlay signal to a television signal which is transmitted through a channel. At a receiver, a replica of the transmitted overlay sequence is generated and synchronized to the overlay signal in the received signal. An adaptive equalizer filter effectively adjusts the received television signal so that the channel perturbations are removed from the signal.Type: GrantFiled: November 30, 1998Date of Patent: October 16, 2001Assignee: General Electric CompanyInventors: Richard Louis Frey, Naofal Mohammed Wassel Al-Dhahir, Mark Lewis Grabb, John Anderson Fergus Ross, John Erik Hershey, Nick Andrew Van Stralen
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Patent number: 6275187Abstract: A system for directing a receiving lobe of an adaptive antenna array toward an aircraft in flight includes an aircraft position vector calculator and an antenna weight vector generator. The aircraft position vector calculator receives aircraft position information from an aircraft tracking service and calculates, based upon the aircraft position information it receives, an aircraft position vector g. An antenna weight vector generator receives the aircraft position vector g from the aircraft position vector calculator and generates, based upon the aircraft position vector g, an antenna element weight vector w. The antenna weight vector w is applied to the elements of an adaptive antenna array to direct a receiving lobe of the array towards an aircraft in flight.Type: GrantFiled: January 8, 1999Date of Patent: August 14, 2001Assignee: General Electric CompanyInventors: John Anderson Fergus Ross, John Erik Hershey, Richard August Korkosz, Naofal Mohammed Wassel Al-Dhahir
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Patent number: 6262659Abstract: A telemeter for telemetry of diagnostic messages from a mobile asset to a remote station comprises a processor coupled to the output of one or more condition sensors. The processor converts the output of the condition sensors to a diagnostic message, and provides the diagnostic message at a processor output. A transmitter is coupled to the processor output. The transmitter is adapted to transmit the diagnostic messages in the Industrial, Scientific, Medical (ISM) frequency band. An exemplary embodiment of a telemetry system of the invention comprises a telemeter adapted to transmit diagnostic messages in the ISM frequency band, and a remote station including a receiver for receiving the diagnostic messages in the ISM band.Type: GrantFiled: March 2, 1999Date of Patent: July 17, 2001Assignee: General Electric CompanyInventors: Richard August Korkosz, William Robert McKinney, Sr., Bruce Gunther Schings, John Anderson Fergus Ross, Naofal Mohammed Wassel Al-Dhahir, Harold Woodruff Tomlinson, Charles McDonald Puckette, John Erik Hershey
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Patent number: 6122015Abstract: A system for filtering digital television signals is provided. The system comprises a generator for providing a first data sequence to a private data packetizer, and a transmitter for transmitting the packetized first data sequence in a data channel of a digital television signal. The system further includes a receiver for receiving the digital television signal and recovering the first data sequence. The receiver includes a channel estimator for providing an estimate of channel characteristics, such as estimated channel impulse estimate and estimated noise variance. The receiver further includes an adaptive equalizer filter having an input for receiving the digital television signal and an input for receiving adaptive filter coefficients. The receiver further includes a coefficient processor for calculating adaptive filter coefficients based on the channel estimate, and providing the adaptive filter coefficients to the adaptive equalizer filter.Type: GrantFiled: December 7, 1998Date of Patent: September 19, 2000Assignee: General Electric CompanyInventors: Naofal Mohammed Wassel Al-Dhahir, John Erik Hershey, Nick Andrew Van Stralen, Richard Louis Frey, Mark Lewis Grabb
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Patent number: 5828335Abstract: A control system for the uplink transmitter of a ground station communicating with a spacecraft includes an antenna located at the ground station, pointed toward the spacecraft for receiving downlink signals transmitted therefrom. The received signals are accompanied by noise attributable to ambient, sky and ground temperatures. A low-noise receiver is coupled to the output port of the antenna, for establishing the receiver noise temperature. A processor is coupled to the low-noise receiver apparatus and to the power control input port of the uplink transmitter, for responding to changes in the received noise power attributable to the presence or absence of precipitation in the downlink. The processor does this by producing an estimate of the attenuation attributable to the rain in the downlink, and generates the control signal in response to the estimate of the attenuation.Type: GrantFiled: November 6, 1995Date of Patent: October 27, 1998Assignee: Martin Marietta CorporationInventors: Naofal Mohammed Wassel Al-Dhahir, John Erik Hershey, Gary Jude Saulnier
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Patent number: 5708966Abstract: A communications system includes first and second ground stations and a spacecraft repeater. Data signals are transmitted between ground stations by way of the repeater, together with spread-spectrum ranging signals. Uplink rain attenuation is compensated for changing the transmitted power at the ground stations. The amount of downlink attenuation is determined by measuring the total carrier-to-noise ratio in three paths, station 1 to station 2, station 2 to station 1, and station 1 to station 1. With these three values of total attenuation, the two downlink attenuations and the number of active signals traversing the repeater can be determined. The downlink attenuations are converted to uplink attenuations, and used to control the transmitters.Type: GrantFiled: April 4, 1996Date of Patent: January 13, 1998Assignee: Lockheed Martin CorporationInventors: Naofal Mohammed Wassel Al-Dhahir, Gary Jude Saulnier, John Erik Hershey
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Patent number: RE42317Abstract: A system for filtering digital television signals is provided. The system comprises a generator for providing a first data sequence to a private data packetizer, and a transmitter for transmitting the packetized first data sequence in a data channel of a digital television signal. The system further includes a receiver for receiving the digital television signal and recovering the first data sequence. The receiver includes a channel estimator for providing an estimate of channel characteristics, such as estimated channel impulse estimate and estimated noise variance. The receiver further includes an adaptive equalizer filter having an input for receiving the digital television signal and an input for receiving adaptive filter coefficients. The receiver further includes a coefficient processor for calculating adaptive filter coefficients based on the channel estimate, and providing the adaptive filter coefficients to the adaptive equalizer filter.Type: GrantFiled: February 22, 2007Date of Patent: May 3, 2011Assignee: General Electric CompayInventors: Naofal Mohammed Wassel Al-Dhahir, John Erik Hersey, Nick Andrew Van Stralen, Richard Louis Frey, Mark Lewis Grabb