Patents Assigned to Comtech EF Data Corp
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Publication number: 20120156986Abstract: A method of reducing adjacent satellite interference, the method comprising monitoring, by a processor, a power spectral density (PSD) of a signal transmitted by a remote transmitter, determining, by the processor, that the PSD of the signal transmitted by the remote transmitter is above a predetermined level, and reducing the PSD of the signal transmitted by the remote transmitter by adjusting at least one of a spread spectrum spreading factor, a power level, a modulation factor, and a forward error correction (FEC) rate using a modulator while maintaining a constant spectral allocation and center frequency of the signal.Type: ApplicationFiled: February 28, 2012Publication date: June 21, 2012Applicant: Comtech EF Data Corp.Inventors: Cris M. Mamaril, Michael Beeler, Wallace Davis
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Publication number: 20120137020Abstract: A data encapsulation system and related methods. Implementations may include: forming at least one frame having a data payload, a data sequence, and one or more control bytes; evaluating data to be stored in the data payload and setting a value of the one or more control bytes, where the value of the one or more control bytes may be equal to: a first control byte value where one or more values of the data correspond with the first control byte value; a second control byte value indicating a size of the data; or a third control byte value where one or more values of the data continue beyond the frame. The value of each one of the one or more control bytes for each of the at least one frames may be equal to either the first, second, or third control byte values.Type: ApplicationFiled: January 31, 2012Publication date: May 31, 2012Applicant: COMTECH EF DATA CORP.Inventor: John Ehlers
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Publication number: 20120127001Abstract: A method for assigning codes to Huffman trees and repairing invalid Huffman trees is disclosed using a calculated delta and moving nodes within the Huffman tree by adjusting their encode register entries.Type: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Applicant: COMTECH EF DATA CORP.Inventors: Patrick A. Owsley, Brian Banister, Jason Franklin
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Publication number: 20120128047Abstract: 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: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Applicant: COMTECH EF DATA CORP.Inventors: Richard Hollingsworth Cannon, John Scott Crockett, Cris M. Mamaril, Mark Dale
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Publication number: 20120082185Abstract: 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: ApplicationFiled: March 9, 2011Publication date: April 5, 2012Applicant: COMTECH EF DATA CORP.Inventors: Michael Beeler, Cris M. Mamaril, Jeffery Harig
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Publication number: 20120057509Abstract: A redundancy system for a co-channel telecommunication system and related methods. Implementations of the redundancy system may include at least a first modulator and a second modulator having a symbol mapper coupled to a parallel bit signal. The symbol mapper may be configured to route each of a plurality of parallel bits received through the parallel bit signal to a plurality of significant bit signals. In a first implementation, a plurality of significant bit signal multiplexers may be used to switch the plurality of parallel bit signals to allow the first and second modulators to operate in either a redundant or operating mode. In a second implementation, a premapped symbol (PMSI) encoder and a PMSI decoder may be used to transmit the plurality of significant bit signals across an interface bus as a real dual-data rate (DDR) signal and an imaginary DDR signal.Type: ApplicationFiled: September 19, 2011Publication date: March 8, 2012Applicant: COMTECH EF DATA CORP.Inventor: Richard M. Miller
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Publication number: 20120026022Abstract: 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: ApplicationFiled: October 7, 2011Publication date: February 2, 2012Applicant: Comtech EF Data Corp.Inventors: Brian A. Banister, Patrick Owsley, Sean M. Collison
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Publication number: 20120002701Abstract: 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: ApplicationFiled: February 10, 2011Publication date: January 5, 2012Applicant: COMTECH EF DATA CORP.Inventors: Frederick Morris, Michael Beeler
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Publication number: 20110310933Abstract: A method of embedding information within a burst carrier signal, the method comprising modulating meta-data using a modulator such that a meta-carrier signal results, lowering a Power Spectral Density (PSD) of the meta-carrier signal by Direct Sequence Spread Spectrum (DSSS) chipping the meta-carrier signal using a linear Pseudo-Random Number (PRN) sequence, embedding one or more modulated symbols of the meta-carrier signal within an unused portion of one or more quadrants of a modulation constellation of a burst carrier signal such that a composite carrier signal results, and synchronously transmitting the composite carrier signal using a transmitter such that symbols of the meta-carrier signal are synchronized with symbols of the burst carrier signal.Type: ApplicationFiled: August 26, 2011Publication date: December 22, 2011Applicant: COMTECH EF DATA CORP.Inventors: Richard Hollingsworth Cannon, Michael Beeler, Cris Mamaril
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Publication number: 20110312290Abstract: A method of signal distortion correction in a telecommunications channel, the method comprising modeling predicted signal distortion of an electromagnetic (EM) signal using one or more non-linearity model parameters of a signal distortion model, calculating and transferring one or more coefficients of the one or more non-linearity model parameters to a signal transmit location, pre-distorting the signal using an inverse function based on the one or more non-linearity model parameters, and transmitting the pre-distorted signal over the telecommunications channel containing a non-linear amplifier to a remote receiving device.Type: ApplicationFiled: August 31, 2011Publication date: December 22, 2011Applicant: COMTECH EF DATA CORP.Inventors: Michael Beeler, Richard Hollingsworth Cannon
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Patent number: 8060646Abstract: An adaptive telecommunications packet transmission system. Implementations may include a compression engine configured to compress a header of at least one uncompressed packet and to send at least one compressed packet corresponding to the at least one uncompressed packet across a communication channel coupled to the compression engine. A refresh rate calculator may be included that is configured to receive at least one error and at least one success from a decompression engine and calculate an adaptive refresh rate based on the at least one error or the at least one success. The refresh rate calculator may be configured to communicate an adaptive refresh rate to the compression engine. The compression engine may be configured to transmit at least one uncompressed packet across the communication channel according to the adaptive refresh rate received from the refresh rate calculator.Type: GrantFiled: February 29, 2008Date of Patent: November 15, 2011Assignee: Comtech EF Data Corp.Inventor: Lakshmana Chintada
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Publication number: 20110269396Abstract: 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: ApplicationFiled: June 16, 2011Publication date: November 3, 2011Applicant: Comtech EF Data Corp.Inventors: Michael Beeler, Jeffery Harig, Wallace Davis, Frederick Morris, Cris Mamaril
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Patent number: 8046532Abstract: A method and system for detecting matching strings in a string of characters utilizing content addressable memory using primary and secondary matches is disclosed.Type: GrantFiled: August 20, 2008Date of Patent: October 25, 2011Assignee: Comtech EF Data Corp.Inventors: Patrick A. Owsley, Nathan Hungerford, Seth Sjoholm, Ed Coulter, Jason Franklin, Brian Banister, Tom Hansen
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Publication number: 20110249706Abstract: A communication method for embedding a meta-carrier under an original carrier signal with reduced or minimal original carrier signal degradation, the method comprising transmitting an original carrier signal and transmitting a meta-carrier signal separate from the original carrier signal, wherein the meta-carrier signal contains information about an original carrier signal, is extractable under an interfered condition, and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal.Type: ApplicationFiled: February 10, 2011Publication date: October 13, 2011Applicant: COMTECH EF DATA CORP.Inventors: Michael Beeler, Frederick Morris, Jeffery Harig, Cris Mamaril
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Publication number: 20110243260Abstract: 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: ApplicationFiled: June 13, 2011Publication date: October 6, 2011Applicant: Comtech EF Data Corp.Inventors: Richard Hollingsworth Cannon, Louis Dubin, Cris Mamaril
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Patent number: 8028125Abstract: A method and system for detecting matching strings in a string of characters utilizing content addressable memory is disclosed.Type: GrantFiled: August 20, 2008Date of Patent: September 27, 2011Assignee: Comtech EF Data Corp.Inventors: Patrick A. Owsley, Brian Banister, Tom Hansen, Jason Franklin, Nathan Hungerford, Seth Sjoholm, Ed Coulter
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Publication number: 20110228929Abstract: A method for encrypting an information carrier comprising generating a sequence of data using a sequence generator, modulating, using a first modulator an output from the sequence generator such that an interference signal results, encoding the interference generator's synchronization information using an encoder, modulating, using a second modulator, the encoded synchronization information such that a synchronization carrier signal results, spreading the synchronization carrier signal using a spreader such that a spread sub-carrier synchronization signal results, and combining the modulated information carrier signal, interference signal, and spread sub-carrier synchronization signal using a signal combiner such that a composite signal results, the interference signal having one or more signal characteristics that results in obfuscation of the information carrier signal when the information carrier signal and interference signal are combined.Type: ApplicationFiled: May 31, 2011Publication date: September 22, 2011Applicant: COMTECH EF DATA CORP.Inventors: Kasra Akhavan-Toyserkani, Andrew Ripple, Michael Beeler, Cris Mamaril
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Publication number: 20110228817Abstract: A method of combining a GPS carrier signal and a communication carrier signal over a common coaxial connection, the method comprising receiving a GPS carrier signal into a signal system using an antenna, which system is configured to receive a non-GPS communication carrier signal from a communication system, processing the GPS carrier signal with the signal communication system to produce a modified GPS carrier signal, the processing comprising at least: filtering the modified GPS carrier signal using a filter, and amplifying the GPS carrier signal using an amplifier; filtering, using a filter, and power combining using a power combiner, the GPS carrier signal and the non-GPS communication carrier signal, and transmitting, using a single coaxial cable, the combined GPS carrier and non-GPS communication carrier signals to a communication device.Type: ApplicationFiled: May 19, 2011Publication date: September 22, 2011Applicant: Comtech EF Data Corp.Inventors: Michael Beeler, Cris Mamaril, Jeffery Harig
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Patent number: 8022781Abstract: A redundancy system for a co-channel telecommunication system and related methods. Implementations of the redundancy system may include at least a first modulator and a second modulator having a symbol mapper coupled to a parallel bit signal. The symbol mapper may be configured to route each of a plurality of parallel bits received through the parallel bit signal to a plurality of significant bit signals. In a first implementation, a plurality of significant bit signal multiplexers may be used to switch the plurality of parallel bit signals to allow the first and second modulators to operate in either a redundant or operating mode. In a second implementation, a premapped symbol (PMSI) encoder and a PMSI decoder may be used to transmit the plurality of significant bit signals across an interface bus as a real dual-data rate (DDR) signal and an imaginary DDR signal.Type: GrantFiled: August 19, 2008Date of Patent: September 20, 2011Assignee: Comtech EF Data Corp.Inventor: Richard M. Miller
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Publication number: 20110211460Abstract: A method for generating a packet sequence for determining a Packet Error Rate (PER) using network packets, the method comprising generating, using a Local Area Network (LAN) enabled computer, a series of network PER test packets and frames, each packet comprising a predetermined unique identifier and each frame comprising a predetermined sequence for the packets in the series of network packets, wherein the series of network packets and frames are each of a size that is compliant with a predetermined framing mode and encapsulation protocol for the transmission system for determining a PER from the series of network packets and frames, and transmitting, using a transmitting device, the network packets and frames to a receiving device.Type: ApplicationFiled: May 5, 2011Publication date: September 1, 2011Applicant: Comtech EF Data Corp.Inventor: Michael Beeler