Patents by Inventor Yuhuan Xu

Yuhuan Xu 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: 8792588
    Abstract: The present invention disclosed a method for operating a software radio receiver. Said method comprises receiving a radio signal, determining a signal quality of said radio signal, selecting a suitable algorithm for a function in the receiver in accordance with said determined signal quality and applying said selected algorithm to the radio signal.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: July 29, 2014
    Assignee: Nokia Corporation
    Inventors: Edmund Coersmeier, Yuhuan Xu, Martin Kosakowski, Marc Hoffmann
  • Publication number: 20130072959
    Abstract: Non-fragmenting low friction bioactive absorbable coils are disclosed that improve long-term anatomic results in the endovascular treatment of intracranial aneurysms. The coils are composed of at least one biocompatible and bioabsorbable polymer. The coils are then coated with a polymer to reduce the friction. The coating can contain drugs, such as growth factors, and can be used to accelerate histopathologic transformation in aneurysms. The coil can be a polymer such as polyglycolic acid (PGA), poly-L-lactic acid (PLLA), polycaprolactive, poly-L-lactide, polydioxanone, polycarbonates, polyanhydrides, polyglycolic acid/poly-L-lactic acid copolymers, polyhydroxybutyrate/hydroxyvalerate copolymers, or combinations thereof.
    Type: Application
    Filed: July 18, 2012
    Publication date: March 21, 2013
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Benjamin M. Wu, Fernando Vinuela, Yuichi Marayama, Yuhuan Xu
  • Patent number: 8010588
    Abstract: The present invention relates to a method and apparatus for implementing a discrete Fourier transformation (DFT) of a predetermined vector size, wherein at least one enhanced DFT module is provided by using at least one type of DFT module including multiplication by first and second types of twiddle factors in respective different multiplication stages separated by an intermediate integration stage, and generating the enhanced DFT module by combining the at least one type of DFT module with a recursive stage configured to multiply by a third type of twiddle factor and to selectively switch between a bypass function and a butterfly function in said recursive stage. Thereby, an implementation of non 2x-radix Fourier transformation can be achieved with moderate hardware complexity.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: August 30, 2011
    Assignee: Nokia Corporation
    Inventors: Yuhuan Xu, Ludwig Schwoerer
  • Patent number: 7796951
    Abstract: A lightning detector for lightning detection and a lightning detection method, wherein the lightning detector includes a Digital Radio Mondiale (DRM) digital broadcasting system receiver having an analog front-end and a digital base-band; wherein with the analog front-end DRM receiver the radio signal from lightning can be detected when a DRM receiver application and a lightning detection application operate in the same AM band application engine.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: September 14, 2010
    Assignee: Nokia Corporation
    Inventors: Edmund Coersmeier, Joni Jantunen, Martin Kosakowski, Stefan Mende, Yuhuan Xu
  • Publication number: 20090209217
    Abstract: The invention relates to an electronic device comprising a headset connector adapted to connect a headset to the electronic device and an active amplifier circuit connected to the headset connector. The active amplifier circuit is adapted to amplify radio signals received by an antenna, which is connected to the electronic device via the headset connector. The invention relates equally to a chip comprising such an active amplifier circuit, to a system comprising the electronic device and to a corresponding method for receiving radio signals at such an electronic device.
    Type: Application
    Filed: October 14, 2005
    Publication date: August 20, 2009
    Inventors: Edmund Coersmeier, Martin Kosakowski, Stefan Mende, Yuhuan Xu, Thomas Hinzmann, Jesper Hartig Larsen
  • Publication number: 20090131123
    Abstract: Provided are apparatuses and methods for reducing processor load or power consumption during channel estimation in a receiver. For example, a receiver may monitor a transmission channel and determine if a change in channel parameters or characteristics has occurred. If a change is detected, the receiver may update filter coefficients associated with channel estimation. If a change is not detected, the filter coefficients may be maintained such that no change or updated is made to the filter coefficients.
    Type: Application
    Filed: March 17, 2006
    Publication date: May 21, 2009
    Applicant: NOKIA CORPORATION
    Inventors: Edmund Coersmeier, Yuhuan Xu, Martin Kosakowski, Marc Hoffmann
  • Publication number: 20090074112
    Abstract: The present invention disclosed a method for operating a software radio receiver. Said method comprises receiving a radio signal, determining a signal quality of said radio signal, selecting a suitable algorithm for a function in the receiver in accordance with said determined signal quality and applying said selected algorithm to the radio signal.
    Type: Application
    Filed: March 17, 2006
    Publication date: March 19, 2009
    Inventors: Edmund Coersmeier, Yuhuan Xu, Martin Kosakowski, Marc Hoffmann
  • Publication number: 20080290554
    Abstract: Devices for fabricating oriented polymer fibers, and methods for fabricating thereof by electropulling, are provided.
    Type: Application
    Filed: March 31, 2005
    Publication date: November 27, 2008
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Benjamin M. Wu, Michael V. Sofroniew, King-Ning Tu, Yuhuan Xu
  • Publication number: 20080126462
    Abstract: The present invention relates to a method and apparatus for implementing a discrete Fourier transformation (DFT) of a predetermined vector size, wherein at least one enhanced DFT module is provided by using at least one type of DFT module including multiplication by first and second types of twiddle factors in respective different multiplication stages separated by an intermediate integration stage, and generating the enhanced DFT module by combining the at least one type of DFT module with a recursive stage configured to multiply by a third type of twiddle factor and to selectively switch between a bypass function and a butterfly function in said recursive stage. Thereby, an implementation of non 2x-radix Fourier transformation can be achieved with moderate hardware complexity.
    Type: Application
    Filed: June 27, 2007
    Publication date: May 29, 2008
    Inventors: Yuhuan Xu, Ludwig Schwoerer
  • Publication number: 20070299903
    Abstract: The present invention relates to a method and apparatus for implementing a discrete Fourier transformation (DFT) of a predetermined vector size, wherein at least one DFT module is configured to perform DFTs of a first predetermined number and of a vector size corresponding to a second predetermined number, to multiply by twiddle factors, and to perform DFTs of said second predetermined number and of a vector size corresponding to said first predetermined number. At least two of the at least one DFT module are combined to obtain the predetermined vector size. Thereby, an implementation of non 2x-radix Fourier transformation can be achieved with moderate hardware complexity.
    Type: Application
    Filed: September 25, 2006
    Publication date: December 27, 2007
    Inventors: Yuhuan Xu, Ludwig Schwoerer
  • Publication number: 20070093889
    Abstract: Non-fragmenting low friction bioactive absorbable coils are disclosed that improve long-term anatomic results in the endovascular treatment of intracranial aneurysms. The coils are composed of at least one biocompatible and bioabsorbable polymer. The coils are then coated with a polymer to reduce the friction. The coating can contain drugs, such as growth factors, and can be used to accelerate histopathologic transformation in aneurysms. The coil can be a polymer such as polyglycolic acid (PGA), poly-L-lactic acid (PLLA), polycaprolactive, poly-L-lactide, polydioxanone, polycarbonates, polyanhydrides, polyglycolic acid/poly-L-lactic acid copolymers, polyhydroxybutyrate/hydroxyvalerate copolymers, or combinations thereof.
    Type: Application
    Filed: August 28, 2006
    Publication date: April 26, 2007
    Inventors: Benjamin Wu, Fernando Vinuela, Yuichi Murayama, Yuhuan Xu
  • Publication number: 20070087697
    Abstract: A lightning detector for lightning detection and a lightning detection method, wherein the lightning detector includes a Digital Radio Mondiale (DRM) digital broadcasting system receiver having an analog front-end and a digital base-band; wherein with the analog front-end DRM receiver the radio signal from lightning can be detected when a DRM receiver application and a lightning detection application operate in the same AM band application engine.
    Type: Application
    Filed: October 14, 2005
    Publication date: April 19, 2007
    Inventors: Edmund Coersmeier, Joni Jantunen, Martin Kosakowski, Stefan Mende, Yuhuan Xu
  • Publication number: 20060141924
    Abstract: A wireless electronic device receives a digital broadcast data stream above 150 kilohertz, using a digital receiver. The device has a visual output unit for displaying or causing to be displayed a digital image or text received via the broadcast data stream. A user input device enables a user to indicate at least one selected image or text to be automatically saved, or immediately output by the visual output unit. The visual output unit may be capable of providing multimedia output such as digital services and video.
    Type: Application
    Filed: December 28, 2004
    Publication date: June 29, 2006
    Inventors: Stefan Mende, Edmund Coersmeier, Yuhuan Xu, Martin Kosakowski
  • Patent number: 6280794
    Abstract: An improved dielectric material having pores formed therein and a method for forming the material are disclosed. The material is formed of a polymer. Pores within the polymer are formed by forming solid organic particles within the polymer and eventually vaporizing the particles to form pores within the polymer.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: August 28, 2001
    Assignee: Conexant Systems, Inc.
    Inventors: King-Ning Tu, Yuhuan Xu, Bin Zhao
  • Patent number: 5947011
    Abstract: A food plate for containing food and supporting a beverage container wherein the plate and beverage container are held together as a unit by one hand of a person. The food plate has a flat top surface and at least one depression formed therein for containing a food item. A first aperture formed in the plate is sized and shaped to allow passage of a beverage container partially therethrough and engage a mid portion of the beverage container such that the center of gravity of the container is even with or below the top surface of the plate and the lower portion of the container exterior is exposed on the underside of the plate. A second aperture formed in the plate adjacent to the first aperture is sized and shaped to receive the thumb of the person's hand from the underside of the plate.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: September 7, 1999
    Inventor: Yuhuan Xu
  • Patent number: 5342648
    Abstract: Amorphous ferroelectric materials are formed by a sol-gel type process and the ferroelectric properties stabilized by complete hydrolysis and polycondensation, and extraction of residual organic materials, preferably by heating at temperatures below the temperature at which crystallization may occur. Stable solutions of metal alkoxides are prepared by reacting or dissolving a metal alkoxide in alcohol such as absolute ethanol. The solution may be spincast on essentially any substrate, conductor or nonconductor, crystalline or amorphous, transparent or opaque, and even including plastics. Hydrolysis and polycondensation occur in situ to deposit an amorphous ferroelectric film. Residual alcohol is extracted by heating below the temperature at which crystallization occurs. Such films show P-E hysteresis loops and pyroelectric current. Such ferroelectric thin films are useable in electronic, opto-electronic and optical devices.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: August 30, 1994
    Assignee: The Regents of the Universty of California
    Inventors: John D. MacKenzie, Ren Xu, Yuhuan Xu