Patents by Inventor Christopher Douglas Moffatt

Christopher Douglas Moffatt 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).

  • Patent number: 8723720
    Abstract: The wireless detection beacon is for use with a Radio Frequency (RF) interrogator transmitting at a first frequency and receiving at a second frequency. The wireless detection beacon includes a substrate, a power supply carried by the substrate, an antenna assembly carried by the substrate, and a local oscillator (LO) carried by the substrate and configured to be powered by the power supply to provide an LO signal at a third frequency. A mixer is carried by the substrate and coupled to the antenna assembly and the LO. The mixer is configured to generate an outgoing beacon signal to the antenna assembly at the second frequency based upon mixing an incoming signal from the RF interrogator at the first frequency with the LO signal at the third frequency.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: May 13, 2014
    Assignee: Harris Corporation
    Inventors: Christopher Douglas Moffatt, James G. Tonti
  • Patent number: 8442137
    Abstract: The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: May 14, 2013
    Assignee: Harris Corporation
    Inventors: Christopher Douglas Moffatt, Ray J. Kolar, Charles W. Richards
  • Publication number: 20120280862
    Abstract: The wireless detection beacon is for use with a Radio Frequency (RF) interrogator transmitting at a first frequency and receiving at a second frequency. The wireless detection beacon includes a substrate, a power supply carried by the substrate, an antenna assembly carried by the substrate, and a local oscillator (LO) carried by the substrate and configured to be powered by the power supply to provide an LO signal at a third frequency. A mixer is carried by the substrate and coupled to the antenna assembly and the LO. The mixer is configured to generate an outgoing beacon signal to the antenna assembly at the second frequency based upon mixing an incoming signal from the RF interrogator at the first frequency with the LO signal at the third frequency.
    Type: Application
    Filed: May 3, 2011
    Publication date: November 8, 2012
    Applicant: Harris Corporation
    Inventors: Christopher Douglas MOFFATT, James G. Tonti
  • Publication number: 20120114074
    Abstract: The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations.
    Type: Application
    Filed: January 17, 2012
    Publication date: May 10, 2012
    Applicant: Harris Corporation
    Inventors: Christopher Douglas Moffatt, Ray J. Kolar, Charles W. Richards
  • Patent number: 8135081
    Abstract: The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: March 13, 2012
    Assignee: Harris Corporation
    Inventors: Christopher Douglas Moffatt, Ray J. Kolar, Charles W. Richards
  • Patent number: 7965743
    Abstract: A method and system for achieving synchronization at a local site to a wireless communication system transmitting data in a plurality of data packets distributed among a plurality of frequencies alternating in a sequence determined in accordance with at least two characteristics of said remote site by blindly determining at least one of said two characteristics are disclosed. The method comprises the steps of recording a plurality of occurrences of a selected one of the plurality of frequencies, determining the at least one first characteristic from at least one of the data packets, determining locally the at least one second characteristic wherein the determined at least one first characteristic and the at least one second characteristic match the selected frequency at each of the recorded detected occurrences, determining a time period for determining the first and second characteristics; and adjusting the at least one second characteristic by the time period.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: June 21, 2011
    Assignee: Harris Corporation
    Inventors: Thomas Jay Billhartz, Travis Lee Berrier, Christopher Douglas Moffatt
  • Publication number: 20110044403
    Abstract: The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations.
    Type: Application
    Filed: October 15, 2010
    Publication date: February 24, 2011
    Applicant: HARRIS CORPORATION
    Inventors: Christopher Douglas Moffatt, Ray J. Kolar, Charles W. Richards
  • Patent number: 7822136
    Abstract: The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: October 26, 2010
    Assignee: Harris Corporation
    Inventors: Christopher Douglas Moffatt, Ray J. Kolar, Charles W. Richards
  • Publication number: 20100020897
    Abstract: The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations.
    Type: Application
    Filed: October 6, 2009
    Publication date: January 28, 2010
    Inventors: Christopher Douglas Moffatt, Ray J. Kolar, Charles W. Richards
  • Patent number: 7639747
    Abstract: The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: December 29, 2009
    Assignee: Harris Corporation
    Inventors: Christopher Douglas Moffatt, Ray J. Kolar, Charles W. Richards
  • Publication number: 20090225789
    Abstract: A method and system for achieving synchronization at a local site to a wireless communication system transmitting data in a plurality of data packets distributed among a plurality of frequencies alternating in a sequence determined in accordance with at least two characteristics of said remote site by blindly determining at least one of said two characteristics are disclosed. The method comprises the steps of recording a plurality of occurrences of a selected one of the plurality of frequencies, determining the at least one first characteristic from at least one of the data packets, determining locally the at least one second characteristic wherein the determined at least one first characteristic and the at least one second characteristic match the selected frequency at each of the recorded detected occurrences, determining a time period for determining the first and second characteristics; and adjusting the at least one second characteristic by the time period.
    Type: Application
    Filed: March 31, 2009
    Publication date: September 10, 2009
    Inventors: Thomas Jay Billhartz, Travis Lee Berrier, Christopher Douglas Moffatt
  • Patent number: 7555013
    Abstract: A method and system for achieving synchronization at a local site to a wireless communication system transmitting data in a plurality of data packets distributed among a plurality of frequencies alternating in a sequence determined in accordance with at least two characteristics of said remote site by blindly determining at least one of said two characteristics are disclosed. The method comprises the steps of recording a plurality of occurrences of a selected one of the plurality of frequencies, determining the at least one first characteristic from at least one of the data packets, determining locally the at least one second characteristic wherein the determined at least one first characteristic and the at least one second characteristic match the selected frequency at each of the recorded detected occurrences, determining a time period for determining the first and second characteristics; and adjusting the at least one second characteristic by the time period.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: June 30, 2009
    Assignee: Harris Corporation
    Inventors: Thomas Jay Billhartz, Travis Lee Berrier, Christopher Douglas Moffatt
  • Publication number: 20040028083
    Abstract: A method and system for achieving synchronization at a local site to a wireless communication system transmitting data in a plurality of data packets distributed among a plurality of frequencies alternating in a sequence determined in accordance with at least two characteristics of said remote site by blindly determining at least one of said two characteristics are disclosed. The method comprises the steps of recording a plurality of occurrences of a selected one of the plurality of frequencies, determining the at least one first characteristic from at least one of the data packets, determining locally the at least one second characteristic wherein the determined at least one first characteristic and the at least one second characteristic match the selected frequency at each of the recorded detected occurrences, determining a time period for determining the first and second characteristics; and adjusting the at least one second characteristic by the time period.
    Type: Application
    Filed: August 12, 2002
    Publication date: February 12, 2004
    Inventors: Thomas Jay Billhartz, Travis Lee Berrier, Christopher Douglas Moffatt