Search Patents
  • SUPER-LINEAR POWER AMPLIFIERS WITH ADAPTIVE BIASING
    Publication number: 20200373886
    Abstract: In one aspect, a power amplifier apparatus comprising a power amplifier (PA) and an adaptive controller is provided. The PA comprises at least one transistor and the adaptive controller is configured to control a bias voltage of the transistor based on a measured power efficiency of the PA and a measure output signal quality of the PA. In another aspect, a method of optimizing PA performance is provided. The PA comprises at least one transistor and the method includes initializing a bias voltage of the transistor, receiving measurements indicating a power efficiency and an output signal quality of the PA, evaluating the received measurements, calculating a new bias voltage for the transistor based on the evaluation, and applying the calculated new bias voltage to the transistor.
    Type: Application
    Filed: December 18, 2018
    Publication date: November 26, 2020
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Rui HOU, Andre BLEKER, Lars RIDELL VIRTANEN
  • PROJECTION SCREEN AND PROJECTION SYSTEM
    Publication number: 20230359114
    Abstract: A projection screen and a projection system are provided. The projection screen includes a surface layer, at least one substrate layer, a Fresnel lens layer, a reflective layer, and a plurality of light-transmitting protrusions. The surface layer, the substrate layer, the Fresnel lens layer, and the reflective layer are sequentially arranged in a stack manner. The plurality of light-transmitting protrusions are disposed on a surface of the surface layer away from the Fresnel lens layer. At least one light-transmitting protrusion of the plurality of light-transmitting protrusions includes: a body portion and at least one of a gradually narrowing portion or a gradually expanding portion. The gradually narrowing portion or the gradually expanding portion is disposed on a surface of the body portion away from the Fresnel lens layer.
    Type: Application
    Filed: July 12, 2023
    Publication date: November 9, 2023
    Applicant: HISENSE LASER DISPLAY CO., LTD
    Inventors: Wei XIAO, Chao WANG, Rui HOU, Yu FENG
  • ULTRA-WIDEBAND CREST FACTOR REDUCTION
    Publication number: 20210176107
    Abstract: Systems and methods for ultra-wideband Crest Factor Reduction (CFR) are provided. In some embodiments, a method performed by a wireless node for performing CFR includes performing a first CFR step on a plurality of input signals at a first sampling rate with joint peak detection and band-specific noise shaping; and performing a second CFR step on the resulting plurality of input signals at a second sampling rate with joint peak detection and joint noise shaping where the second sampling rate is higher than the first sampling rate. In this way, Peak-to-Average Power Ratio (PAPR) reduction may be increased while the computational complexity is reduced.
    Type: Application
    Filed: May 24, 2019
    Publication date: June 10, 2021
    Inventors: Rui HOU, Leonard REXBERG, Bo GÖRANSSON, Richard HELLBERG, Mats KLINGBERG, Stefan ENGSTRÖM
  • CREST FACTOR REDUCTION
    Publication number: 20220294678
    Abstract: A method for crest factor reduction (CFR). The method includes: generating a signal, xs(t); generating a vector, x(t), of size N×1 based on xs(t), wherein N>1; generating a clipping signal vector, z(t), based on x(t), wherein z(t) is a vector of size N×1; producing a transformed signal vector, y(t), based on z(t), wherein y(t) is a vector of size N×1; and generating an output signal vector, xp(t), based on y(t) and x(t), wherein generating xo(t) comprises subtracting y(t) from x(t) and xo(t) is a vector of size N×1.
    Type: Application
    Filed: August 21, 2019
    Publication date: September 15, 2022
    Applicant: Tetefonaktiebolaget LM Ericsson (publ)
    Inventors: Ashim BISWAS, Stefan ENGSTRÖM, S M Shahrear TANZIL, Rui HOU
  • Hardware acceleration wait time awareness in central processing units with multi-thread architectures
    Patent number: 9870255
    Abstract: Provided is a hardware accelerator, central processing unit, and computing device. A hardware accelerator includes a task accelerating unit configured to, in response to a request for a new task issued by a hardware thread, accelerate the processing of the new task and produce a processing result for the task; a task time prediction unit configured to predict the total waiting time of the new task for returning to a specified address associated with the hardware thread. One aspect of this disclosure makes the hardware thread aware of the time to be waited for before getting a processing result, facilitating its task planning accordingly.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: January 16, 2018
    Assignee: International Business Machines Corporation
    Inventors: Rui Hou, Yi Ge, Kun Wang, Zhen Bo Zhu
  • FORWARD SCATTER IN PARTICULATE MATTER SENSOR
    Publication number: 20190025180
    Abstract: Embodiments relate generally to systems and methods for detecting particulate matter in the air. A particulate matter sensor may comprise an airflow channel; a light source configured to pass light through the airflow channel; an airflow generator configured to generate airflow into the airflow channel; a waveguide configured to direct light from the light source after it passes through the airflow channel and scatters off of particulate matter within the airflow channel; a photodiode configured to receive light scattered by the waveguide; and a computing device coupled to the photodiode having a processor and a memory storing instructions which, when executed by the processor, determines a mass concentration of particles in the airflow channel based on an output of the photodiode.
    Type: Application
    Filed: September 26, 2018
    Publication date: January 24, 2019
    Inventors: Ouyang Yang, Lu Tian, Chen Feng, Lu Jinnan, Rui Hou, Tao Chen
  • ACCELERATOR AND ITS METHOD FOR REALIZING SUPPORTING VIRTUAL MACHINE MIGRATION
    Publication number: 20120005678
    Abstract: A computer-implemented method, an accelerator hardware unit, and an article of manufacture for supporting virtual machine migration. The method includes: acquiring a task request from a task queue of an accelerator hardware unit; extracting identification information of a related virtual machine from the task request; determining whether the identification information of the related virtual machine matches the identification information of a virtual machine to be migrated, where the identification information of a virtual machine to be migrated is recorded in a virtual machine identification information table; and deleting the task request from the task queue if the extracted identification information matches the identification information of a virtual machine to be migrated.
    Type: Application
    Filed: June 22, 2011
    Publication date: January 5, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Yi Ge, Rui Hou, Wu Yu Hui, Liang Liu, Wei Liu
  • FORWARD SCATTER IN PARTICULATE MATTER SENSOR
    Publication number: 20180217044
    Abstract: Embodiments relate generally to systems and methods for detecting particulate matter in the air. A particulate matter sensor may comprise an airflow channel; a light source configured to pass light through the airflow channel; an airflow generator configured to generate airflow into the airflow channel; a waveguide configured to direct light from the light source after it passes through the airflow channel and scatters off of particulate matter within the airflow channel; a photodiode configured to receive light scattered by the waveguide; and a computing device coupled to the photodiode having a processor and a memory storing instructions which, when executed by the processor, determines a mass concentration of particles in the airflow channel based on an output of the photodiode.
    Type: Application
    Filed: February 2, 2017
    Publication date: August 2, 2018
    Inventors: Ouyang Yang, Lu Tian, Chen Feng, Lu Jinnan, Rui Hou, Tao Chen
  • Decoding color barcodes
    Patent number: 11120238
    Abstract: A method of decoding a color barcode involves simultaneously illuminating the color barcode with three light zones in a manner that illuminates each bar of the color barcode with each of the three spatially separated light zones, where the three light zones are each illuminated by a different one of three colors; capturing a monochrome image of light reflected off of the color barcode that includes each of the bars in the barcode illuminated by the three light zones; and for each bar in the color barcode, determining a color of the bar by analysis of the intensity of the light captured in the image of the reflected light intensity in each of the three light zones.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: September 14, 2021
    Assignee: HAND HELD PRODUCTS, INC.
    Inventors: Jie Ren, Jun Yin, Li Liu, Haiming Qu, HongJian Jin, Rui Hou, ZhiPeng Teng, Miansong Chen
  • Super-linear power amplifiers with adaptive biasing
    Patent number: 11444579
    Abstract: In one aspect, a power amplifier apparatus comprising a power amplifier (PA) and an adaptive controller is provided. The PA comprises at least one transistor and the adaptive controller is configured to control a bias voltage of the transistor based on a measured power efficiency of the PA and a measure output signal quality of the PA. In another aspect, a method of optimizing PA performance is provided. The PA comprises at least one transistor and the method includes initializing a bias voltage of the transistor, receiving measurements indicating a power efficiency and an output signal quality of the PA, evaluating the received measurements, calculating a new bias voltage for the transistor based on the evaluation, and applying the calculated new bias voltage to the transistor.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: September 13, 2022
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Rui Hou, Andre Bleker, Lars Ridell Virtanen
  • Accelerator and its method for realizing supporting virtual machine migration
    Patent number: 8578377
    Abstract: A computer-implemented method, an accelerator hardware unit, and an article of manufacture for supporting virtual machine migration. The method includes: acquiring a task request from a task queue of an accelerator hardware unit; extracting identification information of a related virtual machine from the task request; determining whether the identification information of the related virtual machine matches the identification information of a virtual machine to be migrated, where the identification information of a virtual machine to be migrated is recorded in a virtual machine identification information table; and deleting the task request from the task queue if the extracted identification information matches the identification information of a virtual machine to be migrated.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: November 5, 2013
    Assignee: International Business Machines Corporation
    Inventors: Yi Ge, Rui Hou, Wu Yu Hui, Liang Liu, Wei Liu
  • Method and system for sampling input data
    Patent number: 8132051
    Abstract: A method and system for sampling input data. The method includes: buffering input data; recording an execution path of the buffered input data in an online operation module; determining whether the buffered input data passes through a desired execution path, and responsive to the buffered input data passing through the desired execution path, sampling the buffered input data to a data set. The system includes: buffering means for buffering input data; recording means for recording an execution path; sampling means for determining whether the buffered input data passes through a desired execution path.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: March 6, 2012
    Assignee: International Business Machines Corporation
    Inventors: Rui Hou, Zhi Yu Liu, Huayong Wang, Yan Qi Wang, Qiong Zou, Yao Zou
  • Decoding color barcodes
    Patent number: 10796119
    Abstract: A method of decoding a color barcode involves simultaneously illuminating the color barcode with three light zones in a manner that illuminates each bar of the color barcode with each of the three spatially separated light zones, where the three light zones are each illuminated by a different one of three colors; capturing a monochrome image of light reflected off of the color barcode that includes each of the bars in the barcode illuminated by the three light zones; and for each bar in the color barcode, determining a color of the bar by analysis of the intensity of the light captured in the image of the reflected light intensity in each of the three light zones.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: October 6, 2020
    Assignee: HAND HELD PRODUCTS, INC.
    Inventors: Jie Ren, Jun Yin, Li Liu, Haiming Qu, HongJian Jin, Rui Hou, ZhiPeng Teng, Miansong Chen
  • Crest factor reduction
    Patent number: 11750433
    Abstract: A method for crest factor reduction (CFR). The method includes: generating a signal, xs(t); generating a vector, x(t), of size N×1 based on xs(t), wherein N>1; generating a clipping signal vector, z(t), based on x(t), wherein z(t) is a vector of size N×1; producing a transformed signal vector, y(t), based on z(t), wherein y(t) is a vector of size N×1; and generating an output signal vector, xp(t), based on y(t) and x(t), wherein generating xo(t) comprises subtracting y(t) from x(t) and xo(t) is a vector of size N×1.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: September 5, 2023
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Ashim Biswas, Stefan Engström, S M Shahrear Tanzil, Rui Hou
  • Hand-supportable digital imaging-based bar code symbol reader employing an event-driven system control subsystem, automatic IR-based object detection, and trigger-switch activated image capture and processing subsystem
    Patent number: 7347374
    Abstract: A hand-supportable digital imaging-based bar code symbol reader employing an event-driven system control subsystem, automatic IR-based object detection, and a trigger-switch activated image capture and processing subsystem.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: March 25, 2008
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C. Harry Knowles
  • Ultra-wideband crest factor reduction
    Patent number: 11438205
    Abstract: Systems and methods for ultra-wideband Crest Factor Reduction (CFR) are provided. In some embodiments, a method performed by a wireless node for performing CFR includes performing a first CFR step on a plurality of input signals at a first sampling rate with joint peak detection and band-specific noise shaping; and performing a second CFR step on the resulting plurality of input signals at a second sampling rate with joint peak detection and joint noise shaping where the second sampling rate is higher than the first sampling rate. In this way, Peak-to-Average Power Ratio (PAPR) reduction may be increased while the computational complexity is reduced.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: September 6, 2022
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Rui Hou, Leonard Rexberg, Bo Göransson, Richard Hellberg, Mats Klingberg, Stefan Engström
  • HARDWARE SUPPORTED HIGH PERFORMANCE LOCK SCHEMA
    Publication number: 20110161540
    Abstract: A method and apparatus for lock allocation control. When a processor core acquires a lock, other processor cores do not need to constantly poll memory to check whether the required lock is released. Instead, other processor cores will be in sleep state and the next processor core needed will be selectively woken up based on predetermined rule, such that an out-of-order lock contention procedure is turned into an in-order lock allocation procedure. By selectively waking up a processor core that is in sleep state, the method and apparatus can avoid occupying a large amount of bus bandwidth, can avoid cache misses, and can save power consumption of chip.
    Type: Application
    Filed: December 22, 2010
    Publication date: June 30, 2011
    Applicant: International Business Machines Corporation
    Inventors: Xiao Tao Chang, Rui Hou, Yudong Yang, Hong Bo Zeng, Zhen Bo Zhu
  • Method of reading bar code symbols using a digital-imaging based code symbol reading system employing an event-driven multi-tier modular software architecture and supporting automatic operating system login and loading of bar code symbol reading application
    Publication number: 20080149723
    Abstract: A method of reading bar code symbols using a digital-imaging based code symbol reading system employing an event-driven multi-tier modular software architecture and supporting automatic operating system login and loading of a bar code symbol reading application.
    Type: Application
    Filed: May 10, 2007
    Publication date: June 26, 2008
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C. Harry Knowles
  • Digital-imaging based code symbol reading system employing an event-driven multi-tier modular software architecture and supporting automatic operating system login and loading of code symbol reading application
    Patent number: 7469835
    Abstract: Digital-imaging based code symbol reading system employing an event-driven multi-tier modular software architecture and supporting automatic operating system login and loading of a bar code symbol reading application.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: December 30, 2008
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C. Harry Knowles
  • LINEAR DOHERTY POWER AMPLIFIER
    Publication number: 20190140600
    Abstract: An amplifier arrangement for amplifying an input signal to an output signal for delivering to a load is disclosed. The amplifier arrangement comprises a power splitter configured to receive the input signal and produce split input signals. The amplifier arrangement further comprises a first amplifier branch comprising multiple main amplifier circuits. Output signals of the multiple main amplifier circuits are combined to generate a first output signal. The amplifier arrangement further comprises a second amplifier branch comprising at least one auxiliary amplifier circuit. The at least one auxiliary amplifier circuit is configured to receive a split input signal from the power splitter and produce a second output signal. The amplifier arrangement further comprises a power combiner configured to receive the first and second output signals and produce the output signal for delivering to the load.
    Type: Application
    Filed: June 28, 2016
    Publication date: May 9, 2019
    Inventors: Rui Hou, Lars Ridell Virtanen
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