Patents by Inventor Yanyu Huang
Yanyu Huang 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: 11664836Abstract: A received signal is enhanced by removing distortion components of a concurrently transmitted signal. A received signal is acquired in a receive frequency band concurrently with transmission of a transmit signal in a transmit frequency band. The received signal includes an intermodulation distortion component of the transmit signal. A representation of the transmit signal is processed using a non-linear predictor to output a distortion signal representing predicted distortion components in the received signal. The received signal is enhanced using the distortion signal by removing the predicted distortion components from the received signal corresponding to the distortion signal.Type: GrantFiled: May 17, 2018Date of Patent: May 30, 2023Assignee: NanoSemi, Inc.Inventors: Yanyu Huang, Zohaib Mahmood, Yan Li, Alexandre Megretski, Helen H. Kim
-
Patent number: 11303251Abstract: Disclosed are methods, systems, devices, apparatus, media, and other implementations, including a method for digital predistortion for a power amplifier system. The method includes determining one or more system characteristics for the power amplifier system comprising at least a power amplifier that produces output with non-linear distortions, with the one or more system characteristics corresponding to an estimate for a complex load metric for the power amplifier system coupled to a load. The method further includes determining, based on the one or more system characteristics corresponding to the estimate for the complex load metric, digital predistortion (DPD) coefficients to compensate for the nonlinear behavior of the power amplifier system.Type: GrantFiled: October 1, 2018Date of Patent: April 12, 2022Assignee: NanoSemi, Inc.Inventors: Yu-Chen Wu, Yanyu Huang, Zohaib Mahmood, Helen H. Kim
-
Patent number: 11057004Abstract: Disclosed are methods, systems, devices, apparatus, media, design structures, and other implementations, including a method for digital predistortion of multiband signals that includes receiving a plurality of input signals respectively associated with multiple radio frequency (RF) bands, with the plurality of input signals occupying an input frequency span corresponding to a difference between a maximum frequency in a highest of the multiple RF bands and a minimum frequency in a lowest of the multiple RF bands. The method further includes frequency shifting at least one signal from the plurality of input signals to produce condensed shifted signals, each corresponding to a respective one of the plurality of input signals, occupying a condensed frequency span smaller than the input frequency span, and processing the condensed shifted signals, including applying digital predistortion to the condensed shifted signals.Type: GrantFiled: February 23, 2018Date of Patent: July 6, 2021Assignee: NanoSemi, Inc.Inventors: Helen H. Kim, Alexandre Megretski, Yan Li, Kevin Chuang, Zohaib Mahmood, Yanyu Huang
-
Patent number: 10812166Abstract: An approach to predistortion of a first set of signals for an antenna array allows beam-steering without corrupting spectrum away from the main beam and where other users may be located. In some implementations, the predistorter uses fewer than one predistorter per signal (i.e., per power amplifier or per antenna), and/or has the computational complexity of such fewer predistorters, to generate predistortions of the first set of signals for amplification and transmission via the antenna array.Type: GrantFiled: October 6, 2017Date of Patent: October 20, 2020Assignee: NanoSemi, Inc.Inventors: Helen H. Kim, Alexandre Megretski, Yan Li, Kevin Chuang, Zohaib Mahmood, Yanyu Huang
-
Publication number: 20200259465Abstract: Disclosed are methods, systems, devices, apparatus, media, and other implementations, including a method for digital predistortion for a power amplifier system. The method includes determining one or more system characteristics for the power amplifier system comprising at least a power amplifier that produces output with non-linear distortions, with the one or more system characteristics corresponding to an estimate for a complex load metric for the power amplifier system coupled to a load. The method further includes determining, based on the one or more system characteristics corresponding to the estimate for the complex load metric, digital predistortion (DPD) coefficients to compensate for the nonlinear behavior of the power amplifier system.Type: ApplicationFiled: October 1, 2018Publication date: August 13, 2020Inventors: Yu-Chen Wu, Yanyu Huang, Zohaib Mahmood, Helen H. Kim
-
Publication number: 20200177229Abstract: A received signal is enhanced by removing distortion components of a concurrently transmitted signal. A received signal is acquired in a receive frequency band concurrently with transmission of a transmit signal in a transmit frequency band. The received signal includes an intermodulation distortion component of the transmit signal. A representation of the transmit signal is processed using a non-linear predictor to output a distortion signal representing predicted distortion components in the received signal. The received signal is enhanced using the distortion signal by removing the predicted distortion components from the received signal corresponding to the distortion signal.Type: ApplicationFiled: May 17, 2018Publication date: June 4, 2020Inventors: Yanyu Huang, Zohaib MAHMOOD, Yan Li, Alexandre MEGRETSKI, Helen H. KIM
-
Publication number: 20200028476Abstract: Disclosed are methods, systems, devices, apparatus, media, design structures, and other implementations, including a method for digital predistortion of multiband signals that includes receiving a plurality of input signals respectively associated with multiple radio frequency (RF) bands, with the plurality of input signals occupying an input frequency span corresponding to a difference between a maximum frequency in a highest of the multiple RF bands and a minimum frequency in a lowest of the multiple RF bands. The method further includes frequency shifting at least one signal from the plurality of input signals to produce condensed shifted signals, each corresponding to a respective one of the plurality of input signals, occupying a condensed frequency span smaller than the input frequency span, and processing the condensed shifted signals, including applying digital predistortion to the condensed shifted signals.Type: ApplicationFiled: February 23, 2018Publication date: January 23, 2020Inventors: Helen H. Kim, Alexandre Megretski, Yan Li, Kevin Chuang, Zohaib Mahmood, Yanyu Huang
-
Publication number: 20190238204Abstract: An approach to predistortion of a first set of signals for an antenna array allows beam-steering without corrupting spectrum away from the main beam and where other users may be located. In some implementations, the predistorter uses fewer than one predistorter per signal (i.e., per power amplifier or per antenna), and/or has the computational complexity of such fewer predistorters, to generate predistortions of the first set of signals for amplification and transmission via the antenna array.Type: ApplicationFiled: October 6, 2017Publication date: August 1, 2019Inventors: Helen H. Kim, Alexandre Megretski, Yan Li, Kevin Chuang, Zohaib Mahmood, Yanyu Huang
-
Patent number: 10141961Abstract: A received signal is enhanced by removing distortion components of a concurrently transmitted signal. A received signal is acquired in a receive frequency band concurrently with transmission of a transmit signal in a transmit frequency band. The received signal includes an intermodulation distortion component of the transmit signal. A representation of the transmit signal is processed using a non-linear predictor to output a distortion signal representing predicted distortion components in the received signal. The received signal is enhanced using the distortion signal by removing the predicted distortion components from the received signal corresponding to the distortion signal.Type: GrantFiled: May 18, 2017Date of Patent: November 27, 2018Assignee: NanoSemi, Inc.Inventors: Yanyu Huang, Zohaib Mahmood, Yan Li, Alexandre Megretski, Helen H. Kim
-
Publication number: 20180337700Abstract: A received signal is enhanced by removing distortion components of a concurrently transmitted signal. A received signal is acquired in a receive frequency band concurrently with transmission of a transmit signal in a transmit frequency band. The received signal includes an intermodulation distortion component of the transmit signal. A representation of the transmit signal is processed using a non-linear predictor to output a distortion signal representing predicted distortion components in the received signal. The received signal is enhanced using the distortion signal by removing the predicted distortion components from the received signal corresponding to the distortion signal.Type: ApplicationFiled: May 18, 2017Publication date: November 22, 2018Inventors: Yanyu Huang, Zohaib Mahmood, Yan Li, Alexandre Megretski, Helen H. Kim
-
Patent number: 8179205Abstract: Systems and methods for provided for linearization systems and methods for variable attenuators. The variable attenuators can include series transistors along a main signal path from the input to output, as well as shunt transistors. A bootstrapping body bias circuit can be used with one or of the series transistors to allow the body of a connected transistor to swing responsive to a received RF input signal. As the RF signal increases and affects the gate-to-source voltage difference of a transistor, a bootstrapping body bias circuit can adaptively adjust the threshold voltage of the connected transistor and compensate the channel resistance variation resulting from gate-to-source voltage swing. The bootstrapping body bias circuit can be implemented using passive elements, active elements, or a combination thereof.Type: GrantFiled: May 21, 2010Date of Patent: May 15, 2012Assignee: Samsung Electro-MechanicsInventors: Yanyu Huang, Wangmyong Woo, Chang-Ho Lee, Joy Laskar
-
Publication number: 20110285481Abstract: Systems and methods for provided for linearization systems and methods for variable attenuators. The variable attenuators can include series transistors along a main signal path from the input to output, as well as shunt transistors. A bootstrapping body bias circuit can be used with one or of the series transistors to allow the body of a connected transistor to swing responsive to a received RF input signal. As the RF signal increases and affects the gate-to-source voltage difference of a transistor, a bootstrapping body bias circuit can adaptively adjust the threshold voltage of the connected transistor and compensate the channel resistance variation resulting from gate-to-source voltage swing. The bootstrapping body bias circuit can be implemented using passive elements, active elements, or a combination thereof.Type: ApplicationFiled: May 21, 2010Publication date: November 24, 2011Applicants: GEORGIA TECH RESEARCH CORPORATION, SAMSUNG ELECTRO-MECHANICS COMPANYInventors: Yanyu Huang, Wangmyong Woo, Chang-Ho Lee, Joy Laskar