Patents Assigned to Comtech EF Data Corp
  • 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
  • Patent number: 8817802
    Abstract: A method of hitless switching over a communications link, the method comprising transmitting, by a first modulator to a remote receiver, a first carrier signal having a first center frequency, enabling, by a second modulator to the remote receiver, transmission of a second carrier signal having a second center frequency while the first modulator is transmitting the first carrier signal, increasing, through the second modulator, a power level of the second carrier signal while the first carrier signal is transmitting, simultaneously decreasing, through the first modulator, a power level of the first carrier signal while the power level of the second carrier signal is increasing, and disabling transmission of the first carrier signal to the remote receiver when the power level of the second carrier signal reaches a predetermined level.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: August 26, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Wallace Davis, Valentine J. Rhodes, Michael Beeler
  • Publication number: 20140233611
    Abstract: A method of optimizing a link budget analysis comprising performing a first LBA based on a target modulation and coding pair (MODCOD), the MODCOD having a symbol energy to noise density ratio (Es/No), a target setting of a power amplifier, or a target antenna size, determining an excess margin and increasing or decreasing a maximum available MODCOD accordingly, iteratively performing a second LBA, calculating a ratio of allocated bandwidth to PEB and adjusting at least one of the MODCOD, amplifier power, and antenna size, summing a contribution to a final ratio of allocated bandwidth to PEB of the plurality of communications links, accessing a look up table and selecting a new MODCOD or adjusting the amplifier size or antenna size is based on the ratio of allocated bandwidth to PEB and altering one or more transmission or receiving parameters to apply the optimal MODCOD, amplifier size, or antenna size.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 21, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Michael Beeler, Vasile Manea, Joshua Bolick
  • Patent number: 8811460
    Abstract: A burst processing modem. Implementations may include a receive side including a channelizer adapted to process a plurality of channels and write a plurality of frames to a receive RAM array. A receive frame state machine may be adapted to generate a timing signal using a burst time plan for the plurality of frames. A demodulator may be coupled with the receive RAM array and adapted to read from the receive RAM array only the one or more bursts from the plurality of frames indicated by the timing signal. A transmit side may include a modulator coupled with a transmit frame state machine, with a transmit RAM array, and a combiner bank. The combiner bank may read the modulated plurality of channels from the transmit RAM array and assemble a plurality of frames using a timing signal generated from a burst time plan by the transmit frame state machine.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: August 19, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Richard Hollingsworth Cannon, John Scott Crockett, Cris M. Mamaril, Mark Dale
  • Publication number: 20140226696
    Abstract: A method of embedding and transmitting a meta-data message in an original burst carrier signal for message reassembly comprising spreading a meta-carrier signal using a Direct Sequence Spread Spectrum (DSSS) spreading code having a Pseudo-Random Noise (PRN) spreading code sequence, the meta-carrier signal comprising one or more bits of meta-data information about the original burst carrier signal, lowering a power spectral density of the meta-carrier signal using the PRN spreading code such that interference with the original signal is reduced, combining the original burst carrier and the meta-carrier signals using a modulator such that a composite burst carrier signal results wherein the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier, and transmitting the composite burst carrier using a transmitter over a telecommunications channel in which only one burst carrier signal is expected to be present within a predetermined frequency bandwidth at a point in time.
    Type: Application
    Filed: April 15, 2014
    Publication date: August 14, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Michael Beeler, Frederick Morris, Cris Mamaril, Jeffery Harig, Richard Hollingsworth Cannon, Brian Banister
  • Patent number: 8781030
    Abstract: A system for removing interference comprising a receive decimation filter that accepts a composite received baseband signal and generates filtered sampled data at a decimation rate, a transmit decimation filter that accepts a digitally converted replica of an interfering signal and generates filtered sampled data at a decimation rate, an integer sample delay control (ISDC) that provides multiple sample delay control for the replica and stores an estimated delay value, an adaptive filter that provides fractional sample delay control for the replica of the interfering signal and optimizes cancellation of the interfering signal, a digital phase-locked loop (DPLL) programmed with a known frequency offset of the interfering signal that tracks a phase and frequency of the replica of the interfering signal, an automatic gain control (AGC) that maintains near full scale operation of adaptive filtering and the DPLL, and a slicer, mixer, and delay unit forming an error estimator.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: July 15, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Lianfeng Peng, Lazaro F. Cajegas, III
  • Publication number: 20140177520
    Abstract: A method of creating a pseudo hemispherical beam using a plurality of individual spot beams comprising receiving by a single router or packet processor, user data from a plurality of users, processing the user data by the single router or packet processor using a QoS logic such that a single output comprising a plurality of queues of data results, each queue of data comprising data designated for transmission only to one or more predetermined remote receivers, modulating the plurality of queues of data received using a multiple-carrier modulator such that a single output comprising a plurality of individual spot beams results, wherein each individual spot beam has a unique center frequency and carrier signal configuration, and transmitting the plurality of individual spot beams to a repeating relay configured to transmit each individual spot beam to the one or more predetermined remote receivers.
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Wallace Davis, Tiberiu Artzi, Michael Beeler
  • Patent number: 8755425
    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: February 10, 2011
    Date of Patent: June 17, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Frederick Morris, Michael Beeler
  • Publication number: 20140160970
    Abstract: A method of optimizing a link budget analysis (LBA) for a link comprising performing a first LBA based on a target modulation and coding pair (MODCOD) based on one or more link parameters, the MODCOD having a predetermined symbol energy to noise density ratio (Es/No), calculating a ratio of allocated bandwidth to a power equivalent bandwidth (PEB) for the link and converting the ratio to Decibels, determining whether additional energy is present by summing the Es/No for the link at the target MODCOD and the calculated ratio of allocated bandwidth to PEB, accessing a look up table to determine an optimal MODCOD for the link wherein if the sum is a positive value, selecting a MODCOD having a higher Es/No and if the sum is a negative value, selecting a MODCOD having a lower Es/No and altering one or more transmission or receiving parameters to apply the selected optimal MODCOD.
    Type: Application
    Filed: February 13, 2014
    Publication date: June 12, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Michael Beeler, Vasile Manea, Joshua Bolick
  • Publication number: 20140161155
    Abstract: A method of providing a recovery channel for a common transmission network of remote devices comprising encoding data that contains information about a primary carrier signal, modulating the encoded information, spreading, the modulated encoded information such that a secondary carrier signal results, combining, the spread secondary carrier with the primary carrier signal such that the spread secondary carrier signal occupies at least a portion of a bandwidth of the bandwidth pool, transmitting the combined primary and secondary carrier signals across a communications link having a plurality of remote carrier signals also being transmitted across the communications link to a remote receiver and sharing a same bandwidth pool (or multiple bandwidth pools), and reestablishing the communications link with the primary carrier signal after a loss of the communications link using the information about the primary carrier signal contained in the secondary carrier signal to recover one or more network configuration pa
    Type: Application
    Filed: February 12, 2014
    Publication date: June 12, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Michael Beeler, Wallace Davis, Randall Remillong, Jason McCollum
  • Publication number: 20140161204
    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: Application
    Filed: February 18, 2014
    Publication date: June 12, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Richard Hollingsworth Cannon, Louis Dubin, Cris Mamaril
  • Publication number: 20140153580
    Abstract: A method of reducing packet loss resulting from header compression during data transmission comprising of calculating, by a transmitter, the difference between one or more delta fields of each packet among a plurality of packets and a base frame of data wherein for at least a portion of the packets, the base frame is a packet other than a packet immediately preceding the packet for which the difference is calculated, encoding the difference and compressing the plurality of packets using the transmitter; transmitting, using the transmitter, the plurality of compressed packets and an uncompressed full-header packet through a communications channel to a receiver, receiving the plurality of compressed packets and the uncompressed full-header packet by the receiver, and decompressing, by the receiver, the plurality of compressed packets using the difference between the one or more delta fields of each packet among the plurality of compressed packets and the base frame.
    Type: Application
    Filed: February 11, 2014
    Publication date: June 5, 2014
    Applicant: Comtech EF Data Corp.
    Inventors: Lakshmana Chintada, Jason McCollum