Patents by Inventor Glenn Chang

Glenn Chang 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).

  • Publication number: 20180191427
    Abstract: A direct broadcast satellite (DBS) reception assembly may receive a desired satellite signal and process the desired satellite signal for output to a gateway. The DBS assembly may also receive one or more undesired satellite signals and determine a performance metric of the one or more undesired satellite signals. The elevation angle of the assembly and/or the azimuth angle of the assembly may be adjusted based on the performance metric(s) of the undesired satellite signal(s). The adjusting of the elevation angle and/or the azimuth angle may comprise electronically steering a directivity of a receive radiation pattern of the DBS reception assembly and/or mechanically steering one or more components of the assembly via motors, servos, actuators, MEMS, and/or the like. The performance metric may be received signal strength of the undesired signals, received signal strength of the desired signal, SNR of the desired signal, and/or SNR of the undesired signals.
    Type: Application
    Filed: February 27, 2018
    Publication date: July 5, 2018
    Inventors: Glenn Chang, Curtis Ling, Sridhar Ramesh
  • Publication number: 20180191452
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 5, 2018
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shantha Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Publication number: 20180152265
    Abstract: Methods and systems for improved cross polarization rejection and tolerating of coupling between satellite signals may comprise receiving radio frequency (RF) signals on a chip, where the RF signals comprising a desired signal and at least one crosstalk signal. The received RF signals may be down-converted to baseband frequencies, and the down-converted signals are converted to digital signals. Crosstalk may be determined by estimating complex coupling coefficients between the received RF signals utilizing a de-correlation algorithm across a frequency bandwidth comprising the desired and crosstalk signals. The down-converted signals may be low-pass filtered and summed with an output signal from a cancellation filter. The complex coupling coefficients may be determined utilizing the de-correlation algorithm on the summed signals, and may be used to configure the cancellation filter.
    Type: Application
    Filed: January 25, 2018
    Publication date: May 31, 2018
    Inventors: Rajasekhar Pullela, Timothy Gallagher, Glenn Chang
  • Patent number: 9985720
    Abstract: An Internet protocol low noise block downconverter (IP LNB) assembly, which is within a satellite dish assembly, may be operable to collect information received from one or more sensors that are integrated within or coupled to the IP LNB assembly. The IP LNB assembly may provide data and/or services associated with the satellite dish assembly based on the collected information received from the sensor(s). The collected information may be stored locally or remotely. The sensor(s) may comprise a camera, an atmospheric sensor, a motion sensor, a directional sensor, an insolation sensor, an acoustic sensor and/or a seismic sensor. The IP LNB assembly may communicate, to at least a user, one or more alarms based on temporal or spatial changes in the collected information. The sensor(s) may perform infrared (IR), cosmic radiation, ultraviolet (UV), far infrared (FIR), terahertz (THz) radiation, millimeter wave (MMW) and/or microwave sensing.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: May 29, 2018
    Assignee: MAXLINEAR, INC.
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Publication number: 20180109341
    Abstract: A first semiconductor die may comprise an interface circuit and a demodulation circuit. The interface circuit may be operable to receive an externally generated signal and recover decisions of a symbol de-mapper carried in the externally generated signal. The demodulation circuit may be operable to recover one or more transport streams based on the decisions of the symbol de-mapper. The first semiconductor die may comprise circuitry operable to combine a plurality of signals from a plurality of second semiconductor dice, where each of the plurality of signals comprises decisions of a respective one of a plurality of symbol de-mappers.
    Type: Application
    Filed: December 6, 2017
    Publication date: April 19, 2018
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Patent number: 9941986
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: April 10, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shanta Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Patent number: 9912402
    Abstract: A direct broadcast satellite (DBS) reception assembly may receive a desired satellite signal and process the desired satellite signal for output to a gateway. The DBS assembly may also receive one or more undesired satellite signals and determine a performance metric of the one or more undesired satellite signals. The elevation angle of the assembly and/or the azimuth angle of the assembly may be adjusted based on the performance metric(s) of the undesired satellite signal(s). The adjusting of the elevation angle and/or the azimuth angle may comprise electronically steering a directivity of a receive radiation pattern of the DBS reception assembly and/or mechanically steering one or more components of the assembly via motors, servos, actuators, MEMS, and/or the like. The performance metric may be received signal strength of the undesired signals, received signal strength of the desired signal, SNR of the desired signal, and/or SNR of the undesired signals.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: March 6, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Glenn Chang, Curtis Ling, Sridhar Ramesh
  • Publication number: 20180062736
    Abstract: Methods and systems for monitoring and maintenance of satellite dish assemblies. In a satellite dish assembly, baseline settings of the satellite dish assembly may be determined, and then current settings of the satellite dish assembly may be monitored, to identify deviations from the baseline settings. The settings may comprise a location setting, an alignment setting, and/or a received signal strength. The results of the monitoring may be reported to a service provider, which may determine based on the reported results adjustment information for applying adjustments to the satellite dish assembly. The adjustments may comprise adjusting the satellite dish assembly back to the baseline settings. The adjustment information may be provided to a technician and/or a user for applying the adjustments to the satellite dish assembly. The satellite dish assembly may communicated to the technician and/or the user, while applying the adjustments, information relating to current settings.
    Type: Application
    Filed: November 6, 2017
    Publication date: March 1, 2018
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Publication number: 20180048381
    Abstract: Methods and systems are provided for guard band detection and frequency offset detection. For each of a plurality of downconverted signals, frequency related information associated with one or more corresponding circuits used in obtaining the plurality of downconverted signals may be determined; and based on the determined frequency related information, one or both of a band stacking operation and a channel stacking operation may be performed. During the band stacking operation, frequency bands are not stacked on each other or stacked frequency bands do not overlap. During the channel stacking operation, channels are not stacked on each other or stacked channels do not overlap. The frequency related information may be determined based on predefined frequency related parameters associated with the corresponding circuits. Frequency corrections may be performed, on output signals corresponding to the band stacking operation and/or the channel stacking operation, based on the frequency related information.
    Type: Application
    Filed: August 31, 2017
    Publication date: February 15, 2018
    Inventors: Raja Pullela, Glenn Chang, Sridhar Ramesh
  • Patent number: 9882679
    Abstract: Methods and systems for improved cross polarization rejection and tolerating of coupling between satellite signals may comprise receiving radio frequency (RF) signals on a chip, where the RF signals comprising a desired signal and at least one crosstalk signal. The received RF signals may be down-converted to baseband frequencies, and the down-converted signals are converted to digital signals. Crosstalk may be determined by estimating complex coupling coefficients between the received RF signals utilizing a de-correlation algorithm across a frequency bandwidth comprising the desired and crosstalk signals. The down-converted signals may be low-pass filtered and summed with an output signal from a cancellation filter. The complex coupling coefficients may be determined utilizing the de-correlation algorithm on the summed signals, and may be used to configure the cancellation filter.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: January 30, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Raja Pullela, Glenn Chang, Timothy Gallagher
  • Patent number: 9876595
    Abstract: A first semiconductor die may comprise an interface circuit and a demodulation circuit. The interface circuit may be operable to receive an externally generated signal and recover decisions of a symbol de-mapper carried in the externally generated signal. The demodulation circuit may be operable to recover one or more transport streams based on the decisions of the symbol de-mapper. The first semiconductor die may comprise circuitry operable to combine a plurality of signals from a plurality of second semiconductor dice, where each of the plurality of signals comprises decisions of a respective one of a plurality of symbol de-mappers.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: January 23, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Publication number: 20180013485
    Abstract: A satellite reception assembly that provides satellite television and/or radio service to a customer premises may comprise a wireless interface via which it can communicate with other satellite reception assemblies. Wireless connections between satellite reception assemblies may be utilized for providing satellite content between different satellite customer premises. Wireless connections between satellite reception assemblies may be utilized for offloading traffic from other network connections.
    Type: Application
    Filed: September 8, 2017
    Publication date: January 11, 2018
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Publication number: 20170324466
    Abstract: Methods and systems are provided for Internet protocol low noise block downconverters (IP LNBs) supporting positioning. An IP LNB that is within a satellite reception assembly may determine based on signals received from at least two different sources, location information and corresponding time information for the IP LNB; and may communicate the determined location information and the corresponding time information to a wireless communication device communicatively coupled to the IP LNB. The location information may be configured to enable the wireless communication device to determine its location based on the determined location information and the corresponding time information. The IP LNB may receive the location information of the wireless communication device from that device. The IP LNB may adaptively provide services based on one or more of: its determined location information, the corresponding time information, and the location information of the wireless communication device.
    Type: Application
    Filed: April 20, 2017
    Publication date: November 9, 2017
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Patent number: 9813146
    Abstract: An Internet protocol low noise block downconverter (IP LNB) assembly, which is within a satellite dish assembly, may be operable to determine one or more baseline settings of the satellite dish assembly. The IP LNB assembly may monitor, periodically or aperiodically, one or more current settings that may correspond to the determined one or more baseline settings to identify deviations of the one or more current settings from the baseline settings. The results of the monitoring may be communicated to a satellite service provider. The satellite service provider may provide maintenance and/or service management for the satellite dish assembly based on the communicated results of the monitoring. The IP LNB assembly may determine a location setting via a GNSS module and determine an alignment setting via a directional sensor in the IP LNB assembly. The IP LNB assembly may determine a received signal strength based on a RSSI.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: November 7, 2017
    Assignee: MAXLINEAR, INC.
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Patent number: 9813761
    Abstract: One or more circuits for use in a transceiver that is collocated with a satellite dish, may receive a satellite signal carrying media content, and remove content protection from the received media content. After removing the first content protection, the one or more circuits may apply second content protection to the media content. The content protection applied by the one or more circuits may adhere to a different protocol, utilize different keys, and/or otherwise be distinguishable from the content protection that was removed. After applying the content protection, the one or more circuits may transmit the media content onto one or more links between the satellite dish and one or more client devices. The removal of the content protection may comprise descrambling and/or decrypting the media content. The application of the content protection may comprise scrambling and/or encrypting the media content.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: November 7, 2017
    Assignee: MAXLINEAR, INC.
    Inventors: Brian Sprague, Glenn Chang, Timothy Gallagher, Sridhar Ramesh
  • Publication number: 20170302367
    Abstract: A satellite reception assembly may comprise a first module operable to demodulate a first one or more channels of a signal output by a direct broadcast satellite (DBS) low noise block downconverter (LNB). The first module may output a signal to a second module which may demodulate a second one or more channels of the signal output by the DBS LNB. The second module may be installed after the satellite reception assembly has been deployed upon a number of clients served by the satellite reception assembly reaching a threshold.
    Type: Application
    Filed: June 15, 2017
    Publication date: October 19, 2017
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Publication number: 20170288908
    Abstract: Methods and systems are provided for band translation with protection. A signal processing circuitry (chip) may be configured to receive and process a plurality of input signals, and generate one or more output signals based on the plurality of input signals. The processing may comprise determining when including a component of a first input signal into at least one output signal would have an effect on a component of a second input signal that is also to be included in the output signal, and applying, based on the effect, one or more adjustments to processing of one or both of the first signal and the second signal to mitigate the effect before generating the output signal. In this regard, applying the one or more adjustments may comprise applying one or both of filtering and spectral inversion to one or both of the first signal and the second signal.
    Type: Application
    Filed: April 20, 2017
    Publication date: October 5, 2017
    Inventors: Glenn Chang, Raja Pullela, Sridhar Ramesh
  • Publication number: 20170264325
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Application
    Filed: May 31, 2017
    Publication date: September 14, 2017
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Patent number: 9762311
    Abstract: A satellite reception assembly that provides satellite television and/or radio service to a customer premises may comprise a wireless interface via which it can communicate with other satellite reception assemblies. Wireless connections between satellite reception assemblies may be utilized for providing satellite content between different satellite customer premises. Wireless connections between satellite reception assemblies may be utilized for offloading traffic from other network connections.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: September 12, 2017
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Patent number: 9755728
    Abstract: Methods and systems are provided for guard band detection and/or frequency offset detection. For example, a signal processing circuit may be operable to determine, for each of a plurality of downconverted signals, one or more frequency offsets that are associated with one or more corresponding local oscillators (LOs) used in obtaining the plurality of downconverted signals; and relating to the determined frequency offsets may be generated for the plurality of downconverted signals. The signal processing circuit may perform, based on the generated information, one or both of a band stacking operation and a channel stacking operation so as to prevent channels/bands being stacked on each other or being overlapped.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: September 5, 2017
    Assignee: MAXLINEAR, INC.
    Inventors: Raja Pullela, Glenn Chang, Sridhar Ramesh