Patents by Inventor Luis Alberto Campos

Luis Alberto Campos 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).

  • Patent number: 11569973
    Abstract: Systems and methods presented herein provide for improved duplex communications in an RF cable network comprising a plurality of CMs. In one embodiment, a system includes a CMTS operable to transmit downstream communications to the CMs and to process upstream communications from the CMs. The system also includes a duplex RF communication path between the CMTS and the CMs. The CMTS is further operable to transmit a control signal that directs a first of the CMs to transmit, to direct the remaining CMs to receive the transmission from the first CM, to direct the CMs to report received power levels of the transmission from the first CM, and to calculate RF isolations of the remaining CMs with respect to the first CM based on the reported power levels.
    Type: Grant
    Filed: January 2, 2021
    Date of Patent: January 31, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Belal Hamzeh, Thomas H. Williams, Daniel Rice, Luis Alberto Campos
  • Patent number: 11563508
    Abstract: A communications network includes a central communication unit, an optical transport medium, and a plurality of remote radio base stations. The central communication unit generates, within a selected millimeter-wave frequency band, a plurality of adjacent two-tone optical frequency conjugate pairs. Each conjugate pair includes a first optical tone carrying a modulated data signal, and a second optical tone carrying a reference local oscillator signal. The optical transport medium transports the plurality of two-tone conjugate pairs to the plurality of radio base stations, and each base station receives at least one conjugate pair at an optical front end thereof. The optical front end separates the first optical tone from the second optical tone, and converts the first optical tone into a millimeter-wave radio frequency electrical signal.
    Type: Grant
    Filed: October 11, 2021
    Date of Patent: January 24, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Ruoyu Sun, Balkan Kecicioglu, Junwen Zhang, Haipeng Zhang, Zhensheng Jia, Luis Alberto Campos
  • Patent number: 11564020
    Abstract: A radio frequency (RF) beam transmission component having optical inputs and electrical outputs may include a wavelength selective switch (WSS) that has a plurality of optical WSS outputs. Each optical WSS output may be configured to transmit one or more wavelengths of the incoming optical signals. The RF beam transmission component may include a plurality of photodetectors (PD), each photodetector having an optical PD input coupled to one or more of said plurality of optical WSS outputs and a corresponding electrical output of a plurality of PD electrical outputs. The RF beam transmission component may further include a lens that has a plurality of electrical inputs and each electrical input may be electrically coupled to at least one of the plurality of electrical PD outputs. The lens may further have a plurality of electrical lens output ports.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: January 24, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Luis Alberto Campos, Zhensheng Jia, Lin Cheng
  • Patent number: 11563445
    Abstract: A method for differentiator-based compression of digital data includes (a) multiplying a tap-weight vector by an original data vector to generate a predicted signal, the original data vector comprising N sequential samples of an original signal, N being an integer greater than or equal to one, (b) using a subtraction module, subtracting the predicted signal from a sample of the original signal to obtain an error signal, (c) using a quantization module, quantizing the error signal to obtain a quantized error signal, and (d) updating the tap-weight vector according to changing statistical properties of the original signal.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: January 24, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Zhensheng Jia, Jing Wang, Luis Alberto Campos
  • Publication number: 20230017887
    Abstract: An optical access network includes an optical hub having at least one processor. The network further includes a plurality of optical distribution centers connected to the optical hub by a plurality of optical fiber segments, respectively, and a plurality of geographic fiber node serving areas. Each fiber node serving area of the plurality of fiber node serving areas includes at least one optical distribution center of the plurality of optical distribution centers. The network further includes a plurality of endpoints. Each endpoint of the plurality of endpoints is in operable communication with at least one optical distribution center. The network further includes a point-to-point network provisioning system configured to (i) evaluate each potential communication path over the plurality of optical fiber segments between a first endpoint and a second endpoint, and (ii) select an optimum fiber path based on predetermined path selection criteria.
    Type: Application
    Filed: September 16, 2022
    Publication date: January 19, 2023
    Inventors: Luis Alberto Campos, Zhensheng Jia, Carmela Stuart
  • Patent number: 11552831
    Abstract: A method for equalizer correction in a communication network includes (a) obtaining raw equalizer coefficients in a frequency domain, (b) removing time delay from the raw equalizer coefficients to generate corrected equalizer coefficients in a time domain such that a direct current (DC) corrected equalizer coefficient of the corrected equalizer coefficients has a phase of zero, and (c) converting the corrected equalizer coefficients from the time domain to the frequency domain.
    Type: Grant
    Filed: April 1, 2022
    Date of Patent: January 10, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, Luis Alberto Campos, Lin Cheng
  • Patent number: 11553357
    Abstract: Beamforming for adapting wireless signaling beams in an adaptive and agile manner is contemplated. The beamforming may be characterized by adaptively constructing beam form parameters to provide wireless signaling in a manner that maximizes efficiency and bandwidth according to device positioning relative to a responding base station.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: January 10, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Jennifer Andreoli-Fang, Thomas Williams
  • Patent number: 11546058
    Abstract: A method for chromatic dispersion pre-compensation in an optical communication network includes (1) distorting an original modulated signal according to an inverse of a transmission function of the optical communication network, to generate a compensated signal, (2) modulating a magnitude of an optical signal in response to a magnitude of the compensated signal, and (3) modulating a phase of the optical signal, after modulating the magnitude of the optical signal, in response to a phase of the compensated signal.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: January 3, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Zhensheng Jia, Haipeng Zhang, Luis Alberto Campos, Junwen Zhang
  • Patent number: 11546061
    Abstract: 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: Grant
    Filed: March 8, 2021
    Date of Patent: January 3, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Junwen Zhang, Zhensheng Jia, Luis Alberto Campos, Haipeng Zhang, Mu Xu, Jing Wang, Curtis Dean Knittle, Chuang Zhou
  • Patent number: 11539441
    Abstract: A method for laser chirp precompensation includes modulating an amplitude of an optical signal, in response to an amplitude of one of (i) a chirp-compensated signal generated via distortion of an original modulated signal according to an inverse of a chirp-response function of a laser and (ii) a first signal derived from the chirp-compensated signal, to yield an amplitude-modulated optical signal. The method also includes modulating a phase of the amplitude-modulated optical signal in response to a phase of one of (i) the chirp-compensated signal and (ii) a second signal derived from the chirp-compensated signal to yield a chirp-compensated optical signal.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: December 27, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Junwen Zhang, Haipeng Zhang, Zhensheng Jia, Luis Alberto Campos, Curtis D. Knittle
  • Patent number: 11539442
    Abstract: A method for automatic power and modulation management in a communication network includes (1) generating a management function of (a) mutual information per symbol (MIPS) of the communication network and (b) output power (P) of a transmitter of the communication network, determining a selected MIPS value and a selected P value which achieve a maximum value of the management function, and causing the transmitter of the communication network to operate according to the selected MIPS value and the selected P value.
    Type: Grant
    Filed: November 3, 2021
    Date of Patent: December 27, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Zhensheng Jia, Luis Alberto Campos, Chris Stengrim
  • Patent number: 11539432
    Abstract: A skew compensation system for a coherent optical communication network includes a transmitter modulator having a first driver input for receiving a first signal from a first channel, a second driver input for receiving a second signal from a second channel, a source input for receiving a continuous wave source signal, and a modulation output in communication with an optical transport medium of the network. The system further includes a tunable delay line disposed between the second channel and the second driver input for inserting a pre-determined training sequence onto the second signal prior to the second driver input, and a processor for determining a skew amount between the second signal at the second driver input and the first signal at the first driver input, calculating a pre-compensation value corresponding to the skew amount, and reducing the skew amount at the modulation output according to the pre-compensation value.
    Type: Grant
    Filed: August 30, 2021
    Date of Patent: December 27, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Luis Alberto Campos, Haipeng Zhang, Junwen Zhang, Zhensheng Jia
  • Patent number: 11540032
    Abstract: An optical network communication system utilizes a passive optical network (PON) and includes an optical line terminal (OLT) having a downstream transmitter and an upstream receiver, and an optical network unit (ONU) having a downstream receiver and an upstream transmitter. The downstream transmitter is configured to provide a coherent downlink transmission, and the downstream receiver is configured to obtain one or more downstream parameters from the coherent downlink transmission. The system further includes a long fiber configured to carry the coherent downlink transmission between the OLT and the ONU. The ONU is configured to communicate to the OLT a first upstream ranging request message, the OLT is configured to communicate to the ONU a first downstream acknowledgement in response to the upstream first ranging request message, and the ONU is configured to communicate to the OLT a second upstream ranging request message based on the first downstream acknowledgement.
    Type: Grant
    Filed: June 14, 2021
    Date of Patent: December 27, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Zhensheng Jia, Matthew Schmitt, Curtis Dean Knittle
  • Publication number: 20220407602
    Abstract: An echo cancellation method includes steps of (a) extracting phase-distortion estimates, (b) reconstructing an echo signal, (c) generating a clean signal, and (d) producing a primary signal. Step (a) includes extracting, from a first phase signal, a plurality of phase-distortion estimates, the first phase signal having been estimated from an echo-corrupted signal received at a first coherent transceiver of a coherent optical network. Step (b) includes reconstructing an echo signal from the plurality of phase-distortion estimates and a transmitted signal transmitted by the first coherent transceiver. Step (c) includes generating a clean signal as a difference between the reconstructed echo signal and the first phase signal. Step (d) includes producing a primary signal by mapping each of a plurality of clean-phase estimates of the clean signal to one of a plurality of constellation symbols associated with a modulation scheme of the primary signal.
    Type: Application
    Filed: August 22, 2022
    Publication date: December 22, 2022
    Inventors: MU XU, ZHENSHENG JIA, JUNWEN ZHANG, HAIPENG ZHANG, LUIS ALBERTO CAMPOS
  • Publication number: 20220385369
    Abstract: An optical network communication system includes an optical hub, an optical distribution center, at least one fiber segment, and at least two end users. The optical hub includes an intelligent configuration unit configured to monitor and multiplex at least two different optical signals into a single multiplexed heterogeneous signal. The optical distribution center is configured to individually separate the at least two different optical signals from the multiplexed heterogeneous signal. The at least one fiber segment connects the optical hub and the optical distribution center, and is configured to receive the multiplexed heterogeneous signal from the optical hub and distribute the multiplexed heterogeneous signal to the optical distribution center. The at least two end users each include a downstream receiver configured to receive one of the respective separated optical signals from the optical distribution center.
    Type: Application
    Filed: August 9, 2022
    Publication date: December 1, 2022
    Inventors: Luis Alberto Campos, Zhensheng Jia
  • Publication number: 20220385359
    Abstract: An optical access network includes an optical hub having at least one processor, and a plurality of optical fiber strands. Each optical fiber strand has a first strand end connected to the optical hub. The network further includes a plurality of nodes connected to at least one segment of a first fiber strand of the plurality of optical fiber strands. Each node is sequentially disposed at respective locations along the first fiber strand at different differences from the optical hub, respectively. The network further includes a plurality of end-points. Each end-point includes a receiver. Each respective receiver (i) has a different optical signal-to-noise ratio (OSNR) from the other receivers, (ii) is operably coupled with at least one node of the plurality of nodes, and (iii) is configured to receive the same optical wavelength signal from the first fiber strand as received by the other receivers.
    Type: Application
    Filed: August 8, 2022
    Publication date: December 1, 2022
    Inventors: Luis Alberto Campos, Zhensheng Jia, Jing Wang
  • Patent number: 11496349
    Abstract: A method for transmitting data through a multi-media communication network includes converting transmission entities into data symbols at a first communication device, transmitting the data symbols from the first communication device to a second communication device through at least two different types of communication media using only lower PHY layers of the at least two different types of communication media, and converting the data symbols into transmission entities at the second communication device.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: November 8, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Jennifer Andreoli-Fang, Judson D. Cary, David Daniel Smith
  • Publication number: 20220352986
    Abstract: Methods, systems, and devices for network communications to reduce optical beat interference (OBI) in upstream communications are described. For example, a fiber node may provide a narrow band seed source to injection lock upstream laser diodes. Therefore, upstream communications from each injection locked laser diode may primarily include the wavelength associated with each seed source. The seed sources may be unique to each end device and configured to minimize OBI. That is, the upstream laser diodes may be generic, but the received seed source may enable upstream communications at varying wavelengths. The fiber node may provide each seed source by filtering (e.g., by a grating filter) a broadband light source.
    Type: Application
    Filed: July 18, 2022
    Publication date: November 3, 2022
    Inventor: Luis Alberto Campos
  • Patent number: 11489594
    Abstract: 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 (i) transmit a downstream optical signal at a first wavelength, and (ii) simultaneously receive an upstream optical signal at a second wavelength. The second coherent optics transceiver is configured to (i) receive the downstream optical signal, and (ii) simultaneously transmit the upstream optical signal. The first wavelength has a first center frequency separated from a second center frequency of the second wavelength.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: November 1, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Luis Alberto Campos, Jing Wang, Mu Xu, Haipeng Zhang, Curtis Dean Knittle
  • Publication number: 20220337320
    Abstract: An optical full-field transmitter for an optical communications network includes a primary laser source configured to provide a narrow spectral linewidth for a primary laser signal, and a first intensity modulator in communication with a first amplitude data source. The first intensity modulator is configured to output a first amplitude-modulated optical signal from the laser signal. The transmitter further includes a first phase modulator in communication with a first phase data source and the first amplitude-modulated optical signal. The first phase modulator is configured to output a first two-stage full-field optical signal. The primary laser source has a structure based on a III-V compound semiconductor.
    Type: Application
    Filed: June 30, 2022
    Publication date: October 20, 2022
    Inventors: HAIPENG ZHANG, JUNWEN ZHANG, MU XU, ZHENSHENG JIA, LUIS ALBERTO CAMPOS