Patents Assigned to Comtech EF Data Corp
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Publication number: 20110206095Abstract: 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: ApplicationFiled: March 11, 2011Publication date: August 25, 2011Applicant: COMTECH EF DATA CORP.Inventor: Michael Beeler
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Publication number: 20110193684Abstract: A method and system for analyzing an electromagnetic (EM) carrier signal that is operating outside transmission parameters by determining that an original carrier signal is operating outside one or more transmission parameters, modulating the original carrier signal and a meta-carrier signal, the meta-carrier signal comprising meta-data that identifies a transmission source, such that a modulated composite carrier signal results, and transmitting the composite carrier signal to a remote receiving device.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: Comtech EF Data Corp.Inventors: Michael Beeler, Frederick Morris
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Patent number: 7991373Abstract: A signal filtering system for a frequency reuse system. A first implementation may include a downlink baseband signal, coupled to a downlink bandwidth filter, including a composite received signal including at least an interfering signal and a signal of interest, each having a composite bandwidth, a first bandwidth, and a second bandwidth, respectively. An uplink baseband signal may be included, coupled to an uplink bandwidth filter, having a replica of the interfering signal corresponding with the interfering signal and having an interference bandwidth. A baseband processing module may be coupled with the downlink bandwidth filter and the uplink bandwidth filter and may be configured to cancel the interfering signal from the composite received signal using the replica of the interfering signal. The downlink bandwidth filter may be configured to reduce the composite bandwidth and the uplink bandwidth filter may be configured to reduce the interference bandwidth.Type: GrantFiled: August 21, 2008Date of Patent: August 2, 2011Assignee: Comtech EF Data Corp.Inventors: Richard M. Miller, Cris M. Mamaril
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Publication number: 20110176603Abstract: A method of inserting meta-data into a physical layer framing structure of a Digital Video Broadcast Satellite-Generation 2 (DVB-S2) comprising encoding meta-data and an original carrier signal using an encoder, the original carrier signal having a pilot sequence, replacing, by a meta-data insertion device, at least a portion of the pilot sequence with at least a portion of the meta-data to form a meta-pilot carrier signal, modulating, using a modulator, the meta-pilot carrier signal to form a modulated meta-pilot carrier signal, and transmitting, using a transmitting device, the modulated meta-pilot carrier signal. Additionally, the meta-data may be inserted by a meta-data insertion device into at least a portion of the XFECFRAME structure when dummy-PL Frames are available when VCM and ACM operation is used.Type: ApplicationFiled: March 31, 2011Publication date: July 21, 2011Applicant: COMTECH EF DATA CORP.Inventors: Michael Beeler, Cris Mamaril, Frederick Morris, Jeffery Harig
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Publication number: 20110170574Abstract: A method of reducing probability of detection and interception of a sub-carrier signal comprising encoding, using an encoder, information that is to be transmitted via the sub-carrier signal, modulating, using a modulator, the encoded information such that a modulated sub-carrier signal results, spreading, using a spreader, the modulated sub-carrier signal such that a spread sub-carrier signal results, and transmitting the spread sub-carrier signal at a frequency that is dynamic relative to an original carrier signal having a static frequency.Type: ApplicationFiled: March 24, 2011Publication date: July 14, 2011Applicant: COMTECH EF DATA CORP.Inventors: Andrew Ripple, Michael Beeler
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Publication number: 20110057688Abstract: A system for generating a frequency reference signal comprising an oscillator, a direct digital synthesizer coupled to the oscillator and configured to receive a signal output from the oscillator, a digital to analog converter coupled to the direct digital synthesizer and configured to receive a sampled signal from the direct digital synthesizer and to convert the sampled signal to an analog waveform, and a bandpass filter coupled to the digital to analog converter and configured to select an aliased output signal from the digital to analog converter at a Nyquist zone other than a first Nyquist zone and to output the frequency reference signal.Type: ApplicationFiled: September 9, 2010Publication date: March 10, 2011Applicant: Comtech EF Data Corp.Inventors: Cris Mamaril, Tiberiu Artizi, Terry Richmond
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Publication number: 20110058518Abstract: A multi-channel demodulating system comprising an analog to digital converter (ADC) that samples an input signal and produces a digital signal, a tuning, filtering, and decimation stage coupled to the ADC and configured to select a transponder based on a frequency range of the digital signal and deliver a signal representative of the digital signal to the transponder, and a demodulator coupled to the selected transponder, a decoder, and the circuit stage, the demodulator configured to receive the representative signal from the transponder, the demodulator and decoder configured to separate and process the representative signal to produce a processed signal. The system further comprises a packet de-encapsulation module coupled to the demodulator and decoder configured to de-encapsulate packets of data contained in the processed signal, a switch coupled to the packet de-encapsulation module and a satellite router, the switch configured to transmit the packets of data to the satellite router.Type: ApplicationFiled: September 8, 2010Publication date: March 10, 2011Applicant: COMTECH EF DATA CORP.Inventor: Mark Dale
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Patent number: 7890751Abstract: A system for increasing data access in a secure socket layer network environment includes a web server computer having SSL acceleration server software (SSLAS) and a client computer communicatively linked to the web server computer having SSL acceleration client software operably associated with the client computer which communicates with the SSLAS software to receive a copy of a pseudo CA certificate and a public key from the SSLAS software and present the pseudo CA certificate to web browser software on the client computer for validation thereof.Type: GrantFiled: December 3, 2003Date of Patent: February 15, 2011Assignee: Comtech EF Data CorpInventors: Brian C. Morris, Scott P. Hertzog, Thomas P. Yohe
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Publication number: 20100220780Abstract: 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: ApplicationFiled: May 11, 2010Publication date: September 2, 2010Applicant: COMTECH EF DATA CORP.Inventors: Lianfeng Peng, Lazaro F. Cajegas, III
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Publication number: 20100162078Abstract: A telecommunication system and related methods. Implementations may include implementations of a method of encoding data for transmission, including forming a frame by encoding a message block using a short-block low density parity check (LDPC) code and an encoder to form a short encoded block, modulating the short encoded block using a modulation format and a modulator to form a modulated short encoded block, including the modulated short encoded block in a data payload of the frame, and transmitting the frame into a telecommunication channel with a transmitter. The frame may be one of a plurality of frames and each modulated short encoded block in each of the plurality of frames may have a constant number of symbols. The frame may include a modulation/code pair (ModCod) including information relating to the modulation format and the short-block LDPC code used for encoding and modulation.Type: ApplicationFiled: March 3, 2010Publication date: June 24, 2010Applicant: COMTECH EF DATA CORP.Inventors: Richard Miller, Brian A. Banister, Patrick Owsley
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Publication number: 20100091825Abstract: 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: December 17, 2009Publication date: April 15, 2010Applicant: COMTECH EF DATA CORP.Inventors: Richard Hollingsworth Cannon, John Scott Crockett, Cris M. Mamaril, Mark Dale
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Publication number: 20100091777Abstract: A burst processing modem and related methods. Implementations of a first method of demodulating bursts from a plurality of channels may include receiving a plurality of channels from a received beam and separating the plurality of channels and storing a plurality of frames in a random access memory (RAM) array with a channelizer where each frame of the plurality of frames includes one or more bursts. The method may include serially reading, using a demodulator in response to receiving a timing signal, a desired burst from a frame stored in the RAM array wherein a burst time plan identifying the desired burst is used by a receive frame state machine to generate the timing signal. The method may include demodulating and decoding the desired burst using a demodulator and a decoder to produce a quantity of packet data, and sending the quantity of packet data to a specified destination.Type: ApplicationFiled: December 17, 2009Publication date: April 15, 2010Applicant: COMTECH EF DATA CORP.Inventors: Richard Hollingsworth Cannon, John Scott Crockett, Cris M. Mamaril, Mark Dale
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Publication number: 20100054379Abstract: A burst demodulator. Implementations may include a first frequency estimating module adapted to remove a first frequency offset from a plurality of data samples. A second frequency estimating module may be coupled with the first frequency estimating module and may be adapted to remove a second frequency offset from the plurality of data samples. A third frequency estimating module may be coupled with the second frequency estimating module and may be adapted to remove a third frequency offset from the plurality of data samples. A clock phase estimating module may be coupled with the third frequency estimating module and may be adapted to calculate a clock phase offset value, select one or more coefficients for a finite impulse response (FIR) filter, and process the plurality of data samples with the FIR filter. A data processing module may be adapted to recover the data included in the plurality of data samples.Type: ApplicationFiled: September 2, 2009Publication date: March 4, 2010Applicant: COMTECH EF DATA CORP.Inventors: Steven Eymann, Phil Reum