Patents by Inventor David J. Krause
David J. Krause 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).
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Publication number: 20190367361Abstract: An automatic optimization of an ozone generating device with a control PC board that controls a corona discharge cell via a microprocessor. An alarm, conveyed through a diagnostic LED, show how the cell is performing. The microprocessor is programmed to monitor current draw, transformer input voltage and length of time of use of the corona discharge cell. LED diagnostic indicator lights give a twelve function diagnostic ability including showing if the generating device is turned off; if the generating device is powered but the pilot input is off; the time between when the pilot input is supplied with voltage and the high voltage finally turns on; the high voltage output is on and stable; the auxiliary output signal lines normally closed or normally open are shorted; the programmed maintenance time has expired.Type: ApplicationFiled: April 24, 2019Publication date: December 5, 2019Inventor: David J. Krause
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Patent number: 9628180Abstract: A system may include an optical transmitter and an optical receiver. The optical transmitter may generate optical signals associated with sub-carriers, and may provide the optical signals via an optical link. The optical receiver may receive the optical signals via the optical link, and may generate samples based on the optical signals. The samples may be associated with the sub-carriers. The optical receiver may combine the samples to form a time domain sample vector having a particular size, and may generate a frequency domain sample vector, having the particular size, based on the time domain sample vector. The optical receiver may demultiplex the frequency domain sample vector to generate domain sample vectors corresponding to the sub-carriers. The optical receiver may process the frequency domain sample vectors to generate equalized frequency domain sample vectors, and may output the equalized frequency domain sample vectors.Type: GrantFiled: March 31, 2014Date of Patent: April 18, 2017Assignee: Infinera CorporationInventors: Han H. Sun, Kuang-Tsan Wu, David J. Krause, Yuejian Wu
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Patent number: 9537577Abstract: A device may insert a set of tones into a transmitter signal at a set of frequency offsets from a set of transmitter channels associated with a set of transmitter channel wavelengths. The set of transmitter channels may include a first channel being associated with a first quantity of bandwidth and a second channel associated with a second quantity of bandwidth. The first quantity of bandwidth may be different from the second quantity of bandwidth. The device may repeatedly adjust the transmitter signal to align the set of transmitter channel wavelengths based on a set of observed responses to the set of tones, generated based on the transmitter signal passing through an optical filter, failing to match a set of expected responses.Type: GrantFiled: October 15, 2014Date of Patent: January 3, 2017Assignee: Infinera CorporationInventors: Jeffrey T. Rahn, David J. Krause
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Patent number: 9485049Abstract: An optical system may include optical transmitters to provide respective optical signals. Each of the respective optical signals may provide one or more carriers in an optical channel. The optical channel may include multiple carriers associated with the respective optical signals. First and second carriers, of the multiple carriers, may have a particular carrier space width. The particular carrier space width may include a frequency error associated with one or more optical signals of the respective optical signals. The optical system may include a control system to determine the frequency error and cause one or more of the optical transmitters to adjust the particular carrier space width based on the adjusted frequency error.Type: GrantFiled: March 29, 2013Date of Patent: November 1, 2016Assignee: Infinera CorporationInventors: John D. McNicol, Han H. Sun, David J. Krause
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Publication number: 20160112141Abstract: A device may insert a set of tones into a transmitter signal at a set of frequency offsets from a set of transmitter channels associated with a set of transmitter channel wavelengths. The set of transmitter channels may include a first channel being associated with a first quantity of bandwidth and a second channel associated with a second quantity of bandwidth. The first quantity of bandwidth may be different from the second quantity of bandwidth. The device may repeatedly adjust the transmitter signal to align the set of transmitter channel wavelengths based on a set of observed responses to the set of tones, generated based on the transmitter signal passing through an optical filter, failing to match a set of expected responses.Type: ApplicationFiled: October 15, 2014Publication date: April 21, 2016Inventors: Jeffrey T. RAHN, David J. KRAUSE
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Patent number: 9312962Abstract: An optical modulator includes a splitter, phase modulators, amplitude modulators, intensity modulators, and a combiner. The splitter is configured to receive light, and split the light into portions of the light. Each of the phase modulators is configured to receive a corresponding one of the portions of the light, and modulate a phase of the portion of the light to provide a phase-modulated signal. Each of the amplitude modulators is configured to receive a corresponding one of the phase-modulated signals, and modulate an amplitude of the phase-modulated signal to provide an amplitude-modulated signal. Each of the intensity modulators is configured to receive a corresponding one of the amplitude-modulated signals, and modulate an intensity of the amplitude-modulated signals to provide an intensity-modulated signal. The combiner is configured to receive the intensity-modulated signals, combine the intensity-modulated signals into a combined signal, and output the combined signal.Type: GrantFiled: November 13, 2012Date of Patent: April 12, 2016Assignee: Infinera CorporationInventors: David J. Krause, Damien Lambert, Masaki Kato, Vikrant Lal, Radhakrishnan L. Nagarajan, Mehrdad Ziari, Fred A. Kish, Jr., John D. McNicol, Han Henry Sun, Kuang-Tsan Wu
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Publication number: 20150280853Abstract: A system may include an optical transmitter and an optical receiver. The optical transmitter may generate optical signals associated with sub-carriers, and may provide the optical signals via an optical link. The optical receiver may receive the optical signals via the optical link, and may generate samples based on the optical signals. The samples may be associated with the sub-carriers. The optical receiver may combine the samples to form a time domain sample vector having a particular size, and may generate a frequency domain sample vector, having the particular size, based on the time domain sample vector. The optical receiver may demultiplex the frequency domain sample vector to generate domain sample vectors corresponding to the sub-carriers. The optical receiver may process the frequency domain sample vectors to generate equalized frequency domain sample vectors, and may output the equalized frequency domain sample vectors.Type: ApplicationFiled: March 31, 2014Publication date: October 1, 2015Applicant: Infinera CorporationInventors: Han H. SUN, Kuang-Tsan WU, David J. KRAUSE, Yuejian WU
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Patent number: 9014705Abstract: An apparatus (100) generates a preferred roaming list (108) for a wireless mobile station (404) that includes area identification data (such as GEO GROUP_ID) (200) corresponding to an area serviced by at least one wireless wide area network, such as a ground based CDMA system and an area services by at least one in-vehicle wireless pico-cell (402), such as a wireless CDMA pico-cell located on an aircraft or any other suitable vehicle. The area identification data (200) is associated with a wireless in-vehicle pico-cell system identification data (205) and in the case of a CDMA pico cell system, a system identification data SID) and network identification (NID) data pair (206) associated with the in-vehicle wireless pico-cell (402).Type: GrantFiled: December 30, 2005Date of Patent: April 21, 2015Assignee: Google Technology Holdings LLCInventors: William P. Alberth, Jr., Daniel J. Declerck, David J. Krause, William E. Welnick
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Patent number: 8977275Abstract: An apparatus (100) generates a preferred roaming list (108) for a wireless mobile station (404) that includes area identification data (such as GEO GROUP_ID) (200) corresponding to an area serviced by at least one wireless wide area network, such as a ground based CDMA system and an area services by at least one in-vehicle wireless pico-cell (402), such as a wireless CDMA pico-cell located on an aircraft or any other suitable vehicle. The area identification data (200) is associated with a wireless in-vehicle pico-cell system identification data (205) and in the case of a CDMA pico cell system, a system identification data SID) and network identification (NID) data pair (206) associated with the in-vehicle wireless pico-cell (402).Type: GrantFiled: December 30, 2005Date of Patent: March 10, 2015Assignee: Google Technology Holdings LLCInventors: William P. Alberth, Jr., Daniel J. Declerck, David J. Krause, William E. Welnick
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Patent number: 8971719Abstract: An optical system may have an optical transmitter including a digital signal processor to receive a signal channel, add data corresponding to a pilot tone, generate a digital signal associated with the signal channel and including the pilot tone, and output the digital signal. The optical system may further have a digital-to-analog converter to convert the digital signal to an analog signal, a laser to provide an optical signal, and a modulator to receive the optical signal and the analog signal, and modulate the optical signal based on the analog signal to form a modulated optical signal. The modulated optical signal may include the pilot tone. The optical system may also have an optical receiver to receive the modulated optical signal, process the modulated optical signal to determine a phase associated with the pilot tone, and apply the phase to the modulated optical signal to recover the signal channel.Type: GrantFiled: December 21, 2012Date of Patent: March 3, 2015Assignee: Infinera CorporationInventors: Pierre Herve Mertz, David J. Krause, Han Henry Sun
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Patent number: 8867930Abstract: Systems and methods for determining the envelope of a modulated signal using high bandwidth and low bandwidth samples of a hybrid signal. The hybrid signal is obtained by mixing the modulated signal with its carrier signal. The systems and methods of the present disclosure may be suitable for equivalent-time or real-time oscilloscopes.Type: GrantFiled: October 27, 2011Date of Patent: October 21, 2014Assignee: Queen's University at KingstonInventors: David J. Krause, John C. Cartledge
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Publication number: 20140294381Abstract: An optical system may include optical transmitters to provide respective optical signals. Each of the respective optical signals may provide one or more carriers in an optical channel. The optical channel may include multiple carriers associated with the respective optical signals. First and second carriers, of the multiple carriers, may have a particular carrier space width. The particular carrier space width may include a frequency error associated with one or more optical signals of the respective optical signals. The optical system may include a control system to determine the frequency error and cause one or more of the optical transmitters to adjust the particular carrier space width based on the adjusted frequency error.Type: ApplicationFiled: March 29, 2013Publication date: October 2, 2014Applicant: INFINERA CORPORATIONInventors: John D. MCNICOL, Han H. SUN, David J. KRAUSE
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Publication number: 20140178065Abstract: An optical system may have an optical transmitter including a digital signal processor to receive a signal channel, add data corresponding to a pilot tone, generate a digital signal associated with the signal channel and including the pilot tone, and output the digital signal. The optical system may further have a digital-to-analog converter to convert the digital signal to an analog signal, a laser to provide an optical signal, and a modulator to receive the optical signal and the analog signal, and modulate the optical signal based on the analog signal to form a modulated optical signal. The modulated optical signal may include the pilot tone. The optical system may also have an optical receiver to receive the modulated optical signal, process the modulated optical signal to determine a phase associated with the pilot tone, and apply the phase to the modulated optical signal to recover the signal channel.Type: ApplicationFiled: December 21, 2012Publication date: June 26, 2014Applicant: Infinera CorporationInventors: Pierre Herve MERTZ, David J. KRAUSE, Han Henry SUN
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Patent number: 8577594Abstract: An apparatus and method for route navigation for multiple destinations. Route parameters can be received and a route (140, 142) can be generated for multiple destinations (132, 134). An estimated time of arrival can be calculated for each destination. An updated estimated time of arrival can be generated for one of the destinations. A messaging service message including the updated time of arrival can be sent to a recipient (122, 124) associated with the respective destination if the updated time of arrival deviates from the original estimated time of arrival.Type: GrantFiled: October 25, 2006Date of Patent: November 5, 2013Assignee: Motorola Mobility LLCInventors: William P. Alberth, Jr., David J. Krause
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Patent number: 8477056Abstract: A system, method, and apparatus is disclosed for interpolation of an output of an analog to digital converter (ADC) to enable operation of the ADC at a sampling rate that is independent of the sampling rate for a DSP core so as to efficiently enable operation at higher date rates. According to one of the embodiments, an interpolation circuit is coupled between the ADC and DSP core and receives a first plurality of samples of data at the first data rate from the ADC and supplies a plurality of samples of second data at a second data rate to the DSP core; the second data rate being less than the first data rate. According to one of the embodiments, the interpolation circuit includes a memory and a FIR filter circuit having filter tap coefficient values selected to provide attenuation at high frequencies to reduce aliasing noise.Type: GrantFiled: June 1, 2010Date of Patent: July 2, 2013Assignee: Infinera CorporationInventors: Han Henry Sun, Kuang-Tsan Wu, Yuejian Wu, Sandy Thomson, John D. McNicol, David J. Krause
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Patent number: 8335440Abstract: A system, method, and apparatus is disclosed for enabling a constant modulus algorithm (CMA) to be reliably used for blind equalization training of an equalizer. According to one embodiment, received signals in a binary phase shift keying (BPSK) format are converted to a quadrature phase shift keying (QPSK) format, to which CMA processing can be reliably applied for equalization. According to another aspect of this embodiment, the equalized QPSK signals are rotated to convert the signals to an equalized BPSK format for output.Type: GrantFiled: June 1, 2010Date of Patent: December 18, 2012Assignee: Infinera CorporationInventors: David J. Krause, Han Henry Sun, John D. McNicol
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Publication number: 20120140809Abstract: Systems and methods for determining the envelope of a modulated signal using high bandwidth and low bandwidth samples of a hybrid signal. The hybrid signal is obtained by mixing the modulated signal with its carrier signal. The systems and methods of the present disclosure may be suitable for equivalent-time or real-time oscilloscopes.Type: ApplicationFiled: October 27, 2011Publication date: June 7, 2012Inventors: David J. KRAUSE, John C. CARTLEDGE
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Publication number: 20110291865Abstract: A system, method, and apparatus is disclosed for interpolation of an output of an analog to digital converter (ADC) to enable operation of the ADC at a sampling rate that is independent of the sampling rate for a DSP core so as to efficiently enable operation at higher date rates. According to one of the embodiments, an interpolation circuit is coupled between the ADC and DSP core and receives a first plurality of samples of data at the first data rate from the ADC and supplies a plurality of samples of second data at a second data rate to the DSP core; the second data rate being less than the first data rate. According to one of the embodiments, the interpolation circuit includes a memory and a FIR filter circuit having filter tap coefficient values selected to provide attenuation at high frequencies to reduce aliasing noise.Type: ApplicationFiled: June 1, 2010Publication date: December 1, 2011Inventors: Han Henry Sun, Kuang-Tsan Wu, Yuejian Wu, Sandy Thomson, John D. McNicol, David J. Krause
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Publication number: 20110293289Abstract: A system, method, and apparatus is disclosed for enabling a constant modulus algorithm (CMA) to be reliably used for blind equalization training of an equalizer. According to one embodiment, received signals in a binary phase shift keying (BPSK) format are converted to a quadrature phase shift keying (QPSK) format, to which CMA processing can be reliably applied for equalization. According to another aspect of this embodiment, the equalized QPSK signals are rotated to convert the signals to an equalized BPSK format for output.Type: ApplicationFiled: June 1, 2010Publication date: December 1, 2011Inventors: David J. Krause, Han Henry Sun, John D. McNicol
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Patent number: 7856238Abstract: In a method of configuring a mobile communication between a position determination entity and a mobile device, an indication that the mobile device has an ability to perform a positioning system search simultaneously with a communication is sent to the position determination entity. A preferred response quality indicator is set to a state that will allow the mobile device an extended period to provide to a location of the mobile device to the position determination entity when the mobile device has the ability to perform a positioning system search simultaneously with a communication.Type: GrantFiled: October 16, 2006Date of Patent: December 21, 2010Assignee: Motorola, Inc.Inventors: David J. Krause, Thomas M. Wied