Patents Assigned to Comtech
  • Patent number: 9025516
    Abstract: A method of maintaining a data rate of a telecommunications link that involves, in a particular embodiment, modulating a carrier signal, encoding the carrier signal, and dynamically controlling a bandwidth of the carrier signal by changing a symbol rate of the carrier signal such that a data rate of the carrier signal remains substantially equal to a predetermined data rate when the carrier signal is transmitted to a remote receiver.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: May 5, 2015
    Assignee: Comtech EF Data Corp.
    Inventors: Wallace Davis, Michael Beeler
  • Patent number: 8982928
    Abstract: A method for detecting multi-user signals including conducting a first energy burst detection detecting a first plurality of user signals as a first energy burst, attempting to decode a user signal from the first plurality of signals within the first energy burst, cancelling out a first user signal from the first energy burst if the first user signal is successfully decoded from the first energy burst, determining a second user signal to be discarded if the second user signal is not successfully decoded from the first energy burst, conducting a second energy burst detection detecting a second plurality of signals as a second burst, and iteratively cancelling out the first user signal successfully decoded from the first energy burst from the second energy burst, wherein the second energy burst detection is conducted when all user signals within the first energy burst are either cancelled out or determined to be discarded.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: March 17, 2015
    Assignee: Comtech Mobile Datacom Corporation
    Inventors: Richard Candell, Paul Ebert, John Fossaceca, Greg Handermann, Mark Holland, Lajuana Johnson, Bruce L. McKinley, Bo Wang, Ralph Eugene Crenshaw
  • Patent number: 8976842
    Abstract: A method of detecting PN code synchronization for a DSSS signal comprising receiving a DSSS data signal of data frames comprised of I and Q symbols, at least a portion of each data frame comprising a unique word, demodulating the data signal into I and Q chip samples, filtering the I and Q chip samples and outputting the filtered I and Q chip samples to a chip stream controller which outputs the plurality of chip streams to a correlation matrix that correlates the plurality of chip streams with the chipped unique word and outputs a correlated data stream. A plurality of FFTs is run on the correlated output data stream and a processor searches for a maximum frequency bin power of each FFT. A PN synchronization detector searches for a maximum frequency bin power of each FFT. A PN synchronization detector searches for a maximum frequency bin power among the plurality of FFT rounds and determines whether PN synchronization is present.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: March 10, 2015
    Assignee: Comtech EF Data Corp.
    Inventor: Lianfeng Peng
  • Patent number: 8976726
    Abstract: A method of and system for distinguishing polarizations and information about the carrier signals transmitted from a repeating relay comprising encoding, using an encoder, a first data stream and a second data stream at a repeating relay, modulating, using a modulator, the first and second encoded data streams at the repeating relay, spreading, using a spreader, the first modulated data stream such that a first spread waveform results having first spreading characteristics and the second modulated data stream such that a second spread waveform results having second spreading characteristics, wherein the first spreading characteristics and the second spreading characteristics are different and differentiate the first spread waveform from the second spread waveform, and transmitting the first spread waveform as a first spread spectrum carrier signal on a first electromagnetic polarization and the second spread waveform as a second spread spectrum carrier signal on a second EM polarization.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: March 10, 2015
    Assignee: Comtech EF Data Corp.
    Inventor: Michael Beeler
  • Patent number: 8964811
    Abstract: A method for identifying the presence of an electronic transmission comprising detecting, by a detecting device, the presence of a burst of electromagnetic energy that results from the presence of an original carrier signal and transmitting, by a transmitting device, a spread spectrum meta-carrier signal within a portion of a bandwidth of the original carrier signal, wherein the meta-carrier signal contains information about the original carrier signal and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal during the presence of the burst of electromagnetic energy.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: February 24, 2015
    Assignee: Comtech EF Data Corp.
    Inventors: Michael Beeler, Cris M. Mamaril, Jeffery Harig
  • Patent number: 8959189
    Abstract: A method of dynamically modeling performance of a communications network that may involve modeling a communications network using a processor by performing a link budget analysis (LBA) for a proposed configuration of the communications network with at least one transmitter, at least one satellite repeating relay, and at least one remote receiver, determining link performance of the communications network by applying historical environmental data to the model, adjusting one or more network configuration parameters based on the determined link performance to improve performance of the modeled communications network, and determining one or more final network configuration parameters by iteratively performing the LBA and adjusting the one or more network configuration parameters based on the determined link performance and historical environmental data.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: February 17, 2015
    Assignee: Comtech EF Data Corp.
    Inventors: Wallace Davis, Michael Beeler
  • Patent number: 8934518
    Abstract: A communication method for transmitting meta-data through a meta-carrier signal comprising encoding meta-data using an encoder, the meta-data comprising information that identifies a repeating relay to which a spread meta-carrier signal is to be transmitted, encoded using an encoder, modulating, using a modulator and spreading, using a spreader, the encoded meta-data such that the spread meta-carrier signal results, and transmitting, by a transmitting device, the spread meta-carrier signal to the repeating relay wherein the repeating relay does not process or modify the spread meta-carrier signal, the spread meta-carrier signal being transmitted over at least a portion of a bandwidth of the repeating relay.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: January 13, 2015
    Assignee: Comtech EF Data Corp.
    Inventors: Frederick Morris, Michael Beeler
  • Patent number: 8913647
    Abstract: A method of receiving and reassembling non-sequential meta-data information embedded within an original burst carrier signal that receives multiple composite burst carrier signals each with an original burst carrier signal and a meta-carrier signal, wherein the meta-carrier signal occupies at least a portion of a bandwidth of the original burst carrier signal and includes one or more bits of meta-data information of a meta-data message about the original burst carrier signal that is non-contiguous in reference to a temporal order in which the meta-data information is received, detecting a DSSS spreading sequence and extracting the meta-carrier signals from the composite burst carrier signals, determining a phase progression of the meta-carrier signals based on a PRN spreading code, and reassembling the one or more bits of meta-data information from each meta-carrier signal into a sequential order after an entire meta-data message is received and extracted.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: December 16, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Michael Beeler, Frederick Morris, Cris Mamaril, Jeffery Harig, Richard Hollingsworth Cannon, Brian Banister
  • Patent number: 8914536
    Abstract: Methods of dynamically modeling performance of a communications network that may include modeling a communications network using a processor by performing a link budget analysis (LBA) for a configuration of the communications network, receiving a plurality of layers of real-time information about the communications network, iteratively performing additional LBAs using one or more of the layers of real-time information from among the plurality of layers of real-time information, multi-dimensionally co-modeling a matrix comprising results of the iteratively performed additional LBAs, and determining one or more final communications network configuration parameters based on the multi-dimensionally co-modeled matrix.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: December 16, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Michael Beeler, John Baddick, Wallace Davis
  • Patent number: 8897718
    Abstract: A method of provisioning a communications link between remote terminals within a hub-spoke network comprising receiving, by a first remote terminal, information about a second remote terminal from a hub, selecting, by the first remote terminal, a modulation factor, coding rate, symbol rate, center frequency, and power level based on the information received about the second remote terminal, transmitting, by the first remote terminal, a signal using at least one of the selected modulation factor, coding rate, symbol rate, center frequency, and power level, to the second remote terminal such that a communications link is created, and adjusting the modulation factor, coding rate, symbol rate, center frequency, or power level of the transmitted signal such that performance of the link is increased while maintaining a presence of the link.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: November 25, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Vasile Manea, Michael Beeler, Frederick Morris, Jeffery Harig
  • Patent number: 8887023
    Abstract: A method of searching for candidate codewords for a telecommunications system, the method comprising receiving a sequence of constellation points, producing a received FEC vector comprised of bits from the received constellation points, comparing the received FEC vector with a plurality of candidate codewords within a Dorsch decoding process using an ordered pattern, and terminating the search when a candidate codeword from among the plurality of candidate codewords is found residing within a predetermined range of a specified distance of the received FEC vector.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: November 11, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Brian A. Banister, Patrick Owsley, Sean M. Collison
  • Publication number: 20140321512
    Abstract: A method for identifying the presence of an electronic transmission comprising detecting, by a detecting device, the presence of a burst of electromagnetic energy that results from the presence of an original carrier signal and transmitting, by a transmitting device, a spread spectrum meta-carrier signal within a portion of a bandwidth of the original carrier signal, wherein the meta-carrier signal contains information about the original carrier signal and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal during the presence of the burst of electromagnetic energy.
    Type: Application
    Filed: February 18, 2014
    Publication date: October 30, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Michael Beeler, Cris M. Mamaril, Jeffery Harig
  • Patent number: 8849193
    Abstract: A method of transmitting telecommunications data comprising modulating first and second data signals, selecting transmit powers first and second terminals to achieve a predetermined power equivalent bandwidth (PEB) through an un-attenuated, transmitting the first data signal to the second terminal and the second data signal to the first terminal through a remote receiver, measuring a total received signal-to-noise ratio of the first and second data signals and a total received signal-to-noise ratio received at the second and first terminals, respectively, measuring a signal-power density ratio between the first and second signals, determining a ratio of excess uplink to downlink losses based a rain model parameter and operating frequency, calculating excess uplink and downlink losses relative an optimized, un-attenuated telecommunications channel, and changing a transmit power of a terminal such that the predetermined PEB is maintained when at least one of the signals experiences attenuation.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: September 30, 2014
    Assignee: Comtech EF Data Corp.
    Inventor: Mark Dale
  • Patent number: 8842783
    Abstract: A method of accelerated carrier signal acquisition for a digital communication receiver, the method comprising receiving a carrier signal by a receiver comprising a carrier recovery loop (CRL), setting the CRL to an open loop setting using a processor, setting a numerically controlled oscillator (NCO) within the CRL at a center frequency of the NCO, determining, by the processor, one or more initial parameters of the CRL, calculating an estimate and polarity for a sign frequency detection frequency using a sign frequency detector while simultaneously estimating a Fast Fourier Transform (FFT) frequency by running an FFT using the processor, comparing polarities of the estimates of the sign frequency detection frequency and FFT frequency and determining a frequency offset using the processor, and adjusting one or more parameters of the CRL based on the frequency offset using the processor.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: September 23, 2014
    Assignee: Comtech EF Data Corp.
    Inventor: Lazaro F. Cajegas, III
  • Publication number: 20140273812
    Abstract: A method for remotely and dynamically controlling adjacent satellite interference comprising monitoring one or more off-axis signals emitted by one or more remote transmitters; determining whether one or more of the off-axis signals is creating adjacent satellite interference (ASI), off axis emissions and inband interference that is higher than a predetermined level of acceptable interference, and transmitting a control signal to at least one of the one or more remote transmitters in response to the determination that the one or more off-axis signals is creating interference that is higher than the predetermined level of acceptable interference, the control signal initiating an adjustment to one or more transmission parameters of the one or more remote transmitters such that interference resulting from the one or more off-axis signals emitted by the one or more remote transmitters is reduced or eliminated.
    Type: Application
    Filed: May 27, 2014
    Publication date: September 18, 2014
    Applicant: COMTECH EF DATA CORP.
    Inventors: Michael Beeler, Jeffery Harig, Wallace Davis, Frederick Morris, Cris Mamaril
  • Patent number: 8837627
    Abstract: A method of reducing signal correlation in a symmetrical adaptive canceller link comprising spectrally inverting one of a first carrier signal and a second carrier signal by causing a spectral inversion of one of the first and second carrier signals using a modulator, transmitting the first and second carrier signals within a bandwidth to a remote receiver using a transmitting device such that a composite carrier signal results, and cancelling at least one of the first carrier signal from the composite carrier signal using a cancellation technique such that the second carrier signal results on one end of the link and the second carrier signal from the composite carrier signal using a cancellation technique such that the first carrier signal results on the opposite end of the link.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: September 16, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Richard Hollingsworth Cannon, Louis Dubin, Cris Mamaril
  • Patent number: 8830903
    Abstract: A method of and system for distinguishing polarizations and information about the carrier signals transmitted from a repeating relay comprising encoding, using an encoder, a first data stream and a second data stream at a repeating relay, modulating, using a modulator, the first and second encoded data streams at the repeating relay, spreading, using a spreader, the first modulated data stream such that a first spread waveform results having first spreading characteristics and the second modulated data stream such that a second spread waveform results having second spreading characteristics, wherein the first spreading characteristics and the second spreading characteristics are different and differentiate the first spread waveform from the second spread waveform, and transmitting the first spread waveform as a first spread spectrum carrier signal on a first electromagnetic polarization and the second spread waveform as a second spread spectrum carrier signal on a second EM polarization.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: September 9, 2014
    Assignee: Comtech EF Data Corp.
    Inventor: Michael Beeler
  • Patent number: 8824571
    Abstract: Methods of transmitting and recovering data traversing a telecommunication channel. Implementations may include forming a first frame of a plurality of frames using a frame module where the first frame includes a first control codeword including information relating to a first format used for a first data payload included in the first frame and where the first control codeword is selected from a non-linear block code and has a first distance spectrum. The method may include forming a second frame of the plurality of frames using the frame module where the second frame includes a second control codeword selected from the non-linear block code and has a second distance spectrum where the second distance spectrum is different from the first distance spectrum. The method may also include transmitting the plurality of frames into a telecommunication channel using a frame transmission module.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: September 2, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Patrick Owsley, Brian A. Banister
  • Publication number: 20140241466
    Abstract: A method of rapid non-data aided carrier signal acquisition for a low symbol rate carrier signal, comprising receiving and converting an analog intermediate frequency carrier to a digital carrier signal, down-converting the signal to substantially baseband, reducing a sampling rate of the digital carrier signal using a decimation filter, determining a highest Fast Fourier Transform (FFT) based on a result of one or more FFT's generated by an FFT module using a peak finder, selecting an input source for the FFT module using a multiplexer, generating a frequency estimate of the digital carrier signal using a walking coarse detector, tuning a carrier recovery loop (CRL) based on the frequency estimate generated by the walking coarse detector, determining a final carrier frequency offset estimate using a result of the FFT module, modulation removal, and the peak finder, and programming an oscillator within the CRL to the final carrier frequency offset estimate.
    Type: Application
    Filed: May 2, 2014
    Publication date: August 28, 2014
    Applicant: Comtech EF Data Corp.
    Inventor: Lazaro F. Cajegas, III
  • Publication number: 20140243031
    Abstract: A method of provisioning a communications link between remote terminals within a hub-spoke network comprising receiving, by a first remote terminal, information about a second remote terminal from a hub, selecting, by the first remote terminal, a modulation factor, coding rate, symbol rate, center frequency, and power level based on the information received about the second remote terminal, transmitting, by the first remote terminal, a signal using at least one of the selected modulation factor, coding rate, symbol rate, center frequency, and power level, to the second remote terminal such that a communications link is created, and adjusting the modulation factor, coding rate, symbol rate, center frequency, or power level of the transmitted signal such that performance of the link is increased while maintaining a presence of the link.
    Type: Application
    Filed: May 6, 2014
    Publication date: August 28, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Vasile Manea, Michael Beeler, Frederick Morris, Jeffery Harig