Patents by Inventor Curtis Dean Knittle
Curtis Dean Knittle 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: 20220303102Abstract: An optical network includes a transmitter portion configured to transmit a digitized stream of symbols over a digital optical link, a mapping unit disposed within the transmitter portion and configured to code the transmitted digitized stream of symbols with a mapping code prior to transmission over the digital optical link, a receiver portion configured to recover the coded stream of symbols from the digital optical link, and a demapping unit disposed within the receiver portion and configured to map the recovered coded stream of symbols into an uncoded digitized signal corresponding to the digitized stream of symbols at the transmitter portion prior to coding by the mapping unit.Type: ApplicationFiled: June 13, 2022Publication date: September 22, 2022Inventors: ZHENSHENG JIA, LUIS ALBERTO CAMPOS, CURTIS DEAN KNITTLE, JING WANG
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Publication number: 20220263576Abstract: An analog signal processor includes a sampling unit configured to (i) filter, in the frequency domain, a received time domain analog signal into a low-frequency end of a corresponding frequency spectrum, (ii) sample the filtered analog signal at a frequency substantially higher than the low-frequency end, and (iii) spread quantization noise over an expanded Nyquist zone of the corresponding frequency spectrum. The processor further includes a noise shaping unit configured to shape the spread quantization noise out of the low-frequency end of the corresponding frequency spectrum such that the filtered analog signal and the shaped quantization noise are substantially separated in the frequency domain, and a quantization unit configured to apply delta-sigma modulation to the filtered analog signal using at least one quantization bit, and output a digitized bit stream that substantially follows the amplitude of the received time domain analog signal.Type: ApplicationFiled: May 2, 2022Publication date: August 18, 2022Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle, Jing Wang
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Publication number: 20220239377Abstract: An injection locked transmitter for an optical communication network includes a primary seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one secondary laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the primary seed laser source. The laser injected modulator is configured to receive the primary seed laser source input and the input data stream, and output a laser modulated data stream.Type: ApplicationFiled: April 18, 2022Publication date: July 28, 2022Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle
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Patent number: 11387929Abstract: A digital receiver is configured to process a polarization multiplexed carrier from a communication network. The polarization multiplexed carrier includes a first polarization and a second polarization. The receiver includes a first lane for transporting a first input signal of the first polarization, a second lane for transporting a second input signal of the second polarization, a dynamic phase noise estimation unit disposed within the first lane and configured to determine a phase noise estimate of the first input signal, a first carrier phase recovery portion configured to remove carrier phase noise from the first polarization based on a combination of the first input signal and a function of the determined phase noise estimate, and a second carrier phase recovery portion configured to remove carrier phase noise from the second polarization based on a combination of the second input signal and the function of the determined phase noise estimate.Type: GrantFiled: October 22, 2020Date of Patent: July 12, 2022Assignee: Cable Television Laboratories, Inc.Inventors: Junwen Zhang, Zhensheng Jia, Mu Xu, Haipeng Zhang, Luis Alberto Campos, Curtis Dean Knittle
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Patent number: 11362756Abstract: An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal.Type: GrantFiled: March 22, 2021Date of Patent: June 14, 2022Assignee: Cable Television Laboratories, Inc.Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle
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Patent number: 11362797Abstract: An optical network includes a transmitter portion configured to transmit a digitized stream of symbols over a digital optical link, a mapping unit disposed within the transmitter portion and configured to code the transmitted digitized stream of symbols with a mapping code prior to transmission over the digital optical link, a receiver portion configured to recover the coded stream of symbols from the digital optical link, and a demapping unit disposed within the receiver portion and configured to map the recovered coded stream of symbols into an uncoded digitized signal corresponding to the digitized stream of symbols at the transmitter portion prior to coding by the mapping unit.Type: GrantFiled: October 12, 2020Date of Patent: June 14, 2022Assignee: Cable Television Laboratories, Inc.Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle, Jing Wang
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Publication number: 20220158751Abstract: A coherent passive optical network extender apparatus includes an extender transceiver for communication with an associated optical headend. The extender transceiver includes at least one receiving portion, at least one transmitting portion, and an extension processor. The apparatus further includes a signal adaptation unit configured to convert a downstream electrical transmission lane into a plurality of individual wavelengths. Each of the converted individual wavelengths are for transmission to one of an optical node and an end user. The apparatus further includes a plurality of transceivers, disposed within the signal adaptation unit, and configured to process and transmit the converted individual wavelengths as a bundle for retransmission to the respective end users.Type: ApplicationFiled: December 27, 2021Publication date: May 19, 2022Inventors: Zhensheng Jia, Curtis Dean Knittle, Luis Alberto Campos
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Publication number: 20220158732Abstract: A baseband processing unit includes a baseband processor configured to receive a plurality of component carriers of a radio access technology wireless service, and a delta-sigma digitization interface configured to digitize at least one carrier signal of the plurality of component carriers into a digitized bit stream, for transport over a transport medium, by (i) oversampling the at least one carrier signal, (ii) quantizing the oversampled carrier signal into the digitized bit stream using two or fewer quantization bits.Type: ApplicationFiled: January 31, 2022Publication date: May 19, 2022Inventors: Jing Wang, Luis Alberto Campos, Zhensheng Jia, Curtis Dean Knittle
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Patent number: 11323180Abstract: An analog signal processor includes a sampling unit configured to (i) filter, in the frequency domain, a received time domain analog signal into a low-frequency end of a corresponding frequency spectrum, (ii) sample the filtered analog signal at a frequency substantially higher than the low-frequency end, and (iii) spread quantization noise over an expanded Nyquist zone of the corresponding frequency spectrum. The processor further includes a noise shaping unit configured to shape the spread quantization noise out of the low-frequency end of the corresponding frequency spectrum such that the filtered analog signal and the shaped quantization noise are substantially separated in the frequency domain, and a quantization unit configured to apply delta-sigma modulation to the filtered analog signal using at least one quantization bit, and output a digitized bit stream that substantially follows the amplitude of the received time domain analog signal.Type: GrantFiled: August 31, 2020Date of Patent: May 3, 2022Assignee: Cable Television Laboratories, Inc.Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle, Jing Wang
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Patent number: 11309969Abstract: An injection locked transmitter for an optical communication network includes a primary seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one secondary laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the primary seed laser source. The laser injected modulator is configured to receive the primary seed laser source input and the input data stream, and output a laser modulated data stream.Type: GrantFiled: February 8, 2021Date of Patent: April 19, 2022Assignee: Cable Television Laboratories, Inc.Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle
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Patent number: 11239916Abstract: A baseband processing unit includes a baseband processor configured to receive a plurality of component carriers of a radio access technology wireless service, and a delta-sigma digitization interface configured to digitize at least one carrier signal of the plurality of component carriers into a digitized bit stream, for transport over a transport medium, by (i) oversampling the at least one carrier signal, (ii) quantizing the oversampled carrier signal into the digitized bit stream using two or fewer quantization bits.Type: GrantFiled: August 10, 2020Date of Patent: February 1, 2022Assignee: Cable Television Laboratories, Inc.Inventors: Jing Wang, Luis Alberto Campos, Zhensheng Jia, Curtis Dean Knittle
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Patent number: 11223504Abstract: An optical network includes a transmitter portion configured to (i) precode an input digitized stream of symbols into a precoded symbol stream, (ii) pulse shape the precoded symbol stream with an eigenvalue channel matrix, and (iii) transmit the pulse shaped symbol stream over a digital optical link. The optical network further includes a receiver portion configured to (i) recover the pulse shaped symbol stream from the digital optical link, (ii) decompose eigenvalues of the eigenvalue channel matrix from the recovered symbol stream, and (iii) decode the decomposed symbol stream into an output symbol stream.Type: GrantFiled: May 4, 2020Date of Patent: January 11, 2022Assignee: Cable Television Laboratories, Inc.Inventors: Mu Xu, Zhensheng Jia, Peng-Chun Peng, Siming Liu, Feng Lu, Curtis Dean Knittle
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Patent number: 11212028Abstract: A coherent passive optical network extender apparatus includes an extender transceiver for communication with an associated optical headend. The extender transceiver includes at least one receiving portion, at least one transmitting portion, and an extension processor. The apparatus further includes a signal adaptation unit configured to convert a downstream electrical transmission lane into a plurality of individual wavelengths. Each of the converted individual wavelengths are for transmission to one of an optical node and an end user. The apparatus further includes a plurality of transceivers, disposed within the signal adaptation unit, and configured to process and transmit the converted individual wavelengths as a bundle for retransmission to the respective end users.Type: GrantFiled: December 30, 2019Date of Patent: December 28, 2021Assignee: Cable Television Laboratories, Inc.Inventors: Zhensheng Jia, Curtis Dean Knittle, Luis Alberto Campos
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Publication number: 20210367676Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.Type: ApplicationFiled: August 9, 2021Publication date: November 25, 2021Inventors: Chuang Zhou, Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle, Jing Wang
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Patent number: 11165437Abstract: A method for virtually performing delta-sigma digitization is provided. The method is performed on a series of digital samples output from a communication stack of a communication network. The method includes steps of obtaining a delta-sigma digitization sampling frequency for the output series of digital samples, calculating an oversampling ratio for the output series of digital samples, interpolating the output series of digital samples at a rate equivalent to the oversampling ratio, and quantizing the interpolated series of digital samples to plurality of discrete predetermined levels.Type: GrantFiled: February 14, 2020Date of Patent: November 2, 2021Assignee: Cable Television Laboratories, Inc.Inventors: Belal Hamzeh, Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle, Jing Wang
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Publication number: 20210336703Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.Type: ApplicationFiled: May 25, 2021Publication date: October 28, 2021Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle
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Patent number: 11108490Abstract: A digital receiver is configured to process a polarization multiplexed carrier from a communication network. The polarization multiplexed carrier includes a first polarization and a second polarization. The receiver includes a first lane for transporting a first input signal of the first polarization, a second lane for transporting a second input signal of the second polarization, a dynamic phase noise estimation unit disposed within the first lane and configured to determine a phase noise estimate of the first input signal, a first carrier phase recovery portion configured to remove carrier phase noise from the first polarization based on a combination of the first input signal and a function of the determined phase noise estimate, and a second carrier phase recovery portion configured to remove carrier phase noise from the second polarization based on a combination of the second input signal and the function of the determined phase noise estimate.Type: GrantFiled: January 9, 2020Date of Patent: August 31, 2021Assignee: Cable Television Laboratories, Inc.Inventors: Zhensheng Jia, Junwen Zhang, Mu Xu, Haipeng Zhang, Luis Alberto Campos, Curtis Dean Knittle
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Patent number: 11088761Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.Type: GrantFiled: April 13, 2020Date of Patent: August 10, 2021Assignee: Cable Television Laboratories, Inc.Inventors: Chuang Zhou, Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle, Jing Wang
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Patent number: 11082143Abstract: A full duplex communication network includes an optical transmitter end having a first coherent optics transceiver, an optical receiver end having a second coherent optics transceiver, and an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver. The first coherent optics transceiver is configured to simultaneously transmit a downstream optical signal and receive an upstream optical signal. The second coherent optics transceiver is configured to simultaneously receive the downstream optical signal from the first coherent optics transceiver and transmit the upstream optical signal first coherent optics transceiver. At least one of the downstream optical signal and the upstream optical signal includes at least one coherent optical carrier and at least one non-coherent optical carrier.Type: GrantFiled: August 16, 2019Date of Patent: August 3, 2021Assignee: Cable Television Laboratories, Inc.Inventors: Zhensheng Jia, Luis Alberto Campos, Jing Wang, Mu Xu, Haipeng Zhang, Curtis Dean Knittle
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Publication number: 20210226718Abstract: An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal.Type: ApplicationFiled: March 22, 2021Publication date: July 22, 2021Inventors: ZHENSHENG JIA, Luis Alberto Campos, Curtis Dean Knittle