Patents by Inventor William N. Furman

William N. Furman 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: 10432445
    Abstract: Systems (400) and methods for reducing a number of cyclostationary features in a transmitted signal. The methods comprise: obtaining by a transmitter a discrete-time IF signal comprising a sequence of samples all having a same sample duration; performing operations by a sub-sample dithering processing device of the transmitter to modify a sample timing of the discrete-time IF signal by decreasing or increasing a duration of at least one first sample of the sequence using a digital signal processing technique in a digital domain; converting the discrete-time IF signal to an RF signal; and transmitting the RF signal having a reduced number of cyclo stationary features.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: October 1, 2019
    Assignee: Harris Global Communications, Inc.
    Inventors: James A. Norris, John W. Nieto, Michael A. Wadsworth, William N. Furman
  • Patent number: 10250232
    Abstract: Systems (400) and methods for removing dither introduced into a transmitted RF signal. The method comprising: receiving, by a receiver, the transmitted RF signal; converting, by the receiver, the transmitted RF signal into a discrete-time IF signal comprising a sequence of samples, where at least a first sample of said samples has a first sample duration different than a second sample duration of at least a second sample of said samples; and performing operations by a sub-sample dither removal device of the receiver to modify a sample timing of the discrete-time IF signal by decreasing or increasing the first sample duration of the first sample using a digital signal processing technique in a digital domain.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: April 2, 2019
    Assignee: Harris Global Communications, Inc.
    Inventors: James A. Norris, John W. Nieto, Michael A. Wadsworth, William N. Furman
  • Publication number: 20180059211
    Abstract: Determining a signal emitter location involves receiving a signal of interest (SOI) at detection devices, generating a time stamp corresponding to the arrival of the SOI at each detection device, and communicating digital data samples and the time stamp to a time-difference of arrival (TDOA) computer system. The TDOA computer system determines a TDOA of the SOI at the detection devices relative to an arrival time at a first one of the detection devices having an earliest time stamp. It determines a first solution to identify the emitter location in accordance with a first TDOA solution method. It evaluates the reliability of the first solution and selectively uses a second solution if the first solution is insufficiently reliable.
    Type: Application
    Filed: August 31, 2016
    Publication date: March 1, 2018
    Inventors: William N. Furman, John W. Nieto, Paul E. Voglewede
  • Patent number: 8792464
    Abstract: A communication network may be uncooperative with an uncooperative communications device. The communication network includes mobile wireless communications devices including a collection device and forward devices. Each forward device is configured to detect a received signal characteristic associated with the uncooperative communications device, and transmit the received signal characteristic to the collection device. The collection device is configured to selectively schedule reception of the received signal characteristic based upon a timing of communications among the forward devices, and determine a parameter associated with the uncooperative communications device based upon the received signal characteristic.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: July 29, 2014
    Assignee: Harris Corporation
    Inventors: Paul E. Voglewede, Nick A. Van Stralen, William N. Furman, Clifford Hessel, Fred C. Kellerman, James J. Hood, Richard J. Buckley, Dennis Martinez
  • Patent number: 8787432
    Abstract: An HF communication system includes a first device, and a second device. The first device sends a message to the second device, the message including a preamble portion, a variable length data portion after the preamble portion having a given ending point selected from among potential ending points, and a check portion after the variable length data portion indicating an end of the message. The second device performs a decoding operation on the message at a potential ending point, and performs a check operation on a potential check portion of the decoded message, and when the check operation is successful, recovers the variable length data portion from the decoded message. Otherwise, the second device performs another decoding operation on the message at a next potential ending point, and performs another check operation on another potential check portion of the respective decoded message.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 22, 2014
    Assignee: Harris Corporation
    Inventors: William N. Furman, John W. Nieto, Eric N. Koski
  • Patent number: 8767882
    Abstract: A mobile wireless communications device may include an antenna, and a receiver coupled to the antenna and being configured to use a modulation having memory for a received message in a block structure. The block structure may include a pair of mini-probes and a body therebetween. The receiver may be configured to demodulate the received message by determining a corresponding set of received signal characteristic values based upon the pair of mini-probes, and determining a decode starting point in the body based upon the set of received signal characteristic values. The receiver may be configured to demodulate the received message by at least, from the decode starting point, decoding the body in a first time direction, and decoding the body in a second time direction based upon a result of the decoding in the first direction.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: July 1, 2014
    Assignee: Harris Corporation
    Inventors: Joseph B. Shaver, John Wesley Nieto, William N. Furman
  • Patent number: 8731074
    Abstract: The communications device includes a phase and frequency tracking loop having a signal input and an adjustable loop filter that establishes a predetermined tracking loop bandwidth for samples of communication signals received at the signal input and processed within the tracking loop. A tracking loop update circuit updates loop filter operating parameters and is operative with the loop filter for increasing or decreasing the tracking loop bandwidth of the phase and frequency tracking loop based on the dynamics of the frequency offset of measured samples from the output of the loop filter over time.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: May 20, 2014
    Assignee: Harris Corporation
    Inventors: William N. Furman, John W. Nieto, William L. Tyler
  • Patent number: 8583431
    Abstract: A communications system includes a first communications device cooperating with a second communications device. The first communications device multiplexes a digital speech message and a corresponding text message into a multiplexed signal, and wirelessly transmits the multiplexed signal. The second communications device wirelessly receives the multiplexed signal, de-multiplexes the multiplexed signal digital into the speech message and the corresponding text message, decodes the speech message for an audio output transducer, and operates a text processor on the corresponding text message for display. The corresponding text message is displayed in synchronization with the speech message output by the audio output transducer. A memory is coupled to the text processor for storing the text message, and the text processor is configured to display the stored text message.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: November 12, 2013
    Assignee: Harris Corporation
    Inventors: William N. Furman, John W. Nieto, Marcelo De Risio
  • Patent number: 8565324
    Abstract: A communications device includes a phase and frequency tracking loop having a signal input and adjustable loop filter that establishes a predetermined tracking loop bandwidth for samples of communication signals received at the signal input and processed within the tracking loop. A tracking loop update circuit updates the loop filter operating parameters. It is operative with the loop filter for increasing or decreasing the tracking loop bandwidth of the phase and frequency tracking loop based on the measured signal-to-noise ratio in the received samples of communication signals at the signal output by the tracking loop and on the known or measured apriori tracking capabilities of demodulator based on the symbol rate of communication signal.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: October 22, 2013
    Assignee: Harris Corporation
    Inventors: William N. Furman, John W. Nieto, William L. Tyler
  • Publication number: 20130223417
    Abstract: A communication network may be uncooperative with an uncooperative communications device. The communication network includes mobile wireless communications devices including a collection device and forward devices. Each forward device is configured to detect a received signal characteristic associated with the uncooperative communications device, and transmit the received signal characteristic to the collection device. The collection device is configured to selectively schedule reception of the received signal characteristic based upon a timing of communications among the forward devices, and determine a parameter associated with the uncooperative communications device based upon the received signal characteristic.
    Type: Application
    Filed: February 29, 2012
    Publication date: August 29, 2013
    Applicant: HARRIS CORPORATION
    Inventors: Paul E. VOGLEWEDE, Nick A. VAN STRALEN, William N. FURMAN, Clifford HESSEL, Fred C. KELLERMAN, James J. HOOD, Richard J. BUCKLEY, Dennis MARTINEZ
  • Patent number: 8488719
    Abstract: A wireless communications device may be configured to perform a first demodulation based upon a first sampling rate of a received signal to generate a first demodulated signal and determine therefrom whether a first error value is not greater than a first threshold, and, if so then decode the first demodulated signal. If the first error value is greater than the first threshold, a second demodulation is performed based upon a second sampling rate of the received signal greater than or equal to the first sampling rate to generate a second demodulated signal and determine therefrom whether a second error value is not greater than a second threshold, and, if so, then decode the second demodulated signal. If the second error value is greater than the second threshold, the second demodulation is performed at least one additional time with at least one change thereto.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: July 16, 2013
    Assignee: Harris Corporation
    Inventors: John W. Nieto, William N. Furman
  • Publication number: 20130054237
    Abstract: A communications system includes a first communications device cooperating with a second communications device. The first communications device multiplexes a digital speech message and a corresponding text message into a multiplexed signal, and wirelessly transmits the multiplexed signal. The second communications device wirelessly receives the multiplexed signal, de-multiplexes the multiplexed signal digital into the speech message and the corresponding text message, decodes the speech message for an audio output transducer, and operates a text processor on the corresponding text message for display. The corresponding text message is displayed in synchronization with the speech message output by the audio output transducer. A memory is coupled to the text processor for storing the text message, and the text processor is configured to display the stored text message.
    Type: Application
    Filed: August 25, 2011
    Publication date: February 28, 2013
    Applicant: Harris Corporation of the State of Delaware
    Inventors: William N. Furman, John W. Nieto, Marcelo De Risio
  • Patent number: 8315244
    Abstract: A wireless communications device may include a transceiver, a memory configured to store a predetermined set of preamble synchronization portions, each preamble synchronization portion having a different length, and a controller cooperating with the transceiver and the memory. The controller may be configured to receive forward transmission blocks, each forward transmission block having a preamble synchronization portion and a body portion associated therewith. The preamble synchronization portion may include a desired preamble synchronization portion from among the predetermined set of preamble synchronization portions. The controller may be configured to determine and use, for each received forward transmission block, the corresponding preamble synchronization portion from among the predetermined set of preamble synchronization portions.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: November 20, 2012
    Assignee: Harris Corporation
    Inventors: John W. Nieto, William N. Furman
  • Patent number: 8213402
    Abstract: A communication system includes a plurality of nodes forming a wireless mesh network. A plurality of wireless communication links connect the nodes together. Each node is formed as a communications device having a physical layer and a media access control (MAC) layer in accordance with the Open System Interconnect (OSI) model and operative for transmitting and receiving communications packets to and from other nodes via the wireless communication links in an Automatic Repeat Request (ARQ) mode. The physical layer monitors channel parameters of the wireless communications link when in an ARQ mode and, based on the channel parameters, communicates to the MAC layer over-the-air (OTA) parameters used for transmitting packets.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: July 3, 2012
    Assignee: Harris Corporation
    Inventors: John W. Nieto, William N. Furman, Michael A. Wadsworth
  • Patent number: 8204164
    Abstract: A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and a tap order selection circuit for selecting the number and order of adaptive filter taps based on one of at least measured output power from the adaptive filter and signal modulation. A demodulator and decoder receives the filtered output signal and demodulates and decodes the signal to obtain the communications data.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: June 19, 2012
    Assignee: Harris Corporation
    Inventors: William N. Furman, John W. Nieto, Fred C. Kellerman, Brian C. Padalino
  • Publication number: 20120069936
    Abstract: A mobile wireless communications device may include an antenna, and a receiver coupled to the antenna and being configured to use a modulation having memory for a received message in a block structure. The block structure may include a pair of mini-probes and a body therebetween. The receiver may be configured to demodulate the received message by determining a corresponding set of received signal characteristic values based upon the pair of mini-probes, and determining a decode starting point in the body based upon the set of received signal characteristic values. The receiver may be configured to demodulate the received message by at least, from the decode starting point, decoding the body in a first time direction, and decoding the body in a second time direction based upon a result of the decoding in the first direction.
    Type: Application
    Filed: September 17, 2010
    Publication date: March 22, 2012
    Applicant: Harris Corporation, Corporation of the State of Delaware
    Inventors: Joseph B. Shaver, John Wesley Nieto, William N. Furman
  • Patent number: 8121236
    Abstract: A communications system receives a modulated communication signal that carries encoded communications data. A signal input receives the communication signal. An adaptive filter circuit is connected to the signal input and comprises N number of parallel adaptive filters. Each adaptive filter has non-adaptive and adaptive taps with weighted coefficients that are different in number from the respective other parallel adaptive filters within the adaptive filter circuit. A selection output circuit is connected to each adaptive filter and selects for output the adaptive filter having the most suppression or least output power or other criterion which can indicate a best choice to use of the N parallel adaptive filters. A demodulator demodulates the signal and a decoder receives the filtered output signal from the demodulator and decodes the signal to obtain the communications data.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: February 21, 2012
    Assignee: Harris Corporation
    Inventors: William N. Furman, John W. Nieto, Fred C. Kellerman, Brian C. Padalino
  • Publication number: 20120039420
    Abstract: A wireless communications device may be configured to perform a first demodulation based upon a first sampling rate of a received signal to generate a first demodulated signal and determine therefrom whether a first error value is not greater than a first threshold, and, if so then decode the first demodulated signal. If the first error value is greater than the first threshold, a second demodulation is performed based upon a second sampling rate of the received signal greater than or equal to the first sampling rate to generate a second demodulated signal and determine therefrom whether a second error value is not greater than a second threshold, and, if so, then decode the second demodulated signal. If the second error value is greater than the second threshold, the second demodulation is performed at least one additional time with at least one change thereto.
    Type: Application
    Filed: August 12, 2010
    Publication date: February 16, 2012
    Applicant: Harris Corporation
    Inventors: John W. Nieto, William N. Furman
  • Patent number: 8107572
    Abstract: A communications system receives a modulated signal that carries encoded communications data. An adaptive filter circuit has a plurality of adaptive filters each having a plurality of non-adaptive and adaptive filter taps with weighted coefficients. At a selected adaptive filter, an interference reduction circuit is responsive to one of at least a received state of a demodulator, the type of modulation used by communication system and the input and output power of adaptive filter for updating the adaptive gain of the adaptive filter, selecting the number and order of adaptive filter taps, separating the spacing of multipath introduced by adaptive filter, controlling input and output normalizing circuits to adaptive filter(s) and selecting if signal passed to demodulator is original received signal or signal output by adaptive filter. A demodulator and decoder receive the filtered output signal and demodulate and decode the signal to obtain the communications data.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: January 31, 2012
    Assignee: Harris Corporation
    Inventors: William N. Furman, John W. Nieto, Fred C. Kellerman, Brian C. Padalino
  • Patent number: 8098708
    Abstract: A radio device includes a transmitter having a modulator for generating M-PAM communications symbols containing communications data. A Fast Walsh Transform circuit orthogonally encodes and band-spreads a communications symbol using the Fast Walsh Transform. A frequency modulation circuit frequency modulates the communications symbols wherein a constant envelope orthogonal Walsh modulated communications signal is generated having a plurality of orthogonal waveforms each forming a separate Walsh communications channel.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: January 17, 2012
    Assignee: Harris Corporation
    Inventors: John W. Nieto, William N. Furman