Patents by Inventor Stephen S. Shiao

Stephen S. Shiao 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: 7418040
    Abstract: A receiver 200 as a component in a wireless communication device 100 and a corresponding method are used for receiving a multi-carrier communication signal and determining a timing offset thereof. The receiver 200 comprises a controller 222 to perform a correlation on each of a plurality of sub-carriers comprising the multi-carrier signal to provide a plurality of timing offsets. A quality metric corresponding to each of the plurality of timing offsets may be employed to select the best timing offset. Alternatively, a set of timing offsets whose quality metric exceed a threshold may be averaged. Either the best or average timing offset is used for processing all the sub-carriers of the multi-carrier signal.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: August 26, 2008
    Assignee: Motorola, Inc.
    Inventors: Michael J. Rudowicz, Stephen S. Shiao, Patrick J. Doran
  • Patent number: 7383175
    Abstract: A pitch adaptive circuit (200) includes an equalizer control circuit (206) that evaluates the pitch of the speech signals that are being processed and depending on the pitch information, the equalizer control circuit (206) selects an equalizer (208, 210) to shape the decoded speech signals. By selecting the best equalizer (208 or 210) to use based on the pitch information, improvements in audio quality are provided automatically without user intervention.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: June 3, 2008
    Assignee: Motorola, Inc.
    Inventors: Patrick J. Doran, Stephen S. Shiao
  • Patent number: 7313188
    Abstract: A system, wireless device (102) and method reduce the peak-to-average power of a transmitter by creating at least two sampled carrier data streams, running each carrier through a separate delay block, mixing each carrier over in frequency an appropriate amount, resulting in at least two frequency division multiplexed signals, and combining the at least two frequency division multiplexed signals together. The four sampled carrier data streams may each have a bandwidth of 25 kHz. Each separate delay block is less than 20% of its corresponding symbol time. The transmitter may be used to transmit wideband integrated digitally enhanced network (WiDEN) signals.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: December 25, 2007
    Assignee: Motorola, Inc.
    Inventors: Stephen S. Shiao, Michael N. Kloos, Michael J. Rudowicz, Patrick J. Doran
  • Patent number: 7280841
    Abstract: In the present power control technique, a power control circuit (404) that is operably coupled to a receiver circuit (412) assesses (514, 522) a tclip adjust value based on a power cutback value from the receiver circuit. The tclip adjust value is forwarded to a peak to average ratio control circuit (402) operably coupled to the power control circuit (404), and using the tclip adjust value, an adjust peak power signal is accordingly assessed (612).
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: October 9, 2007
    Assignee: Motorola, Inc.
    Inventors: Mark A. Goldberg, Stephen S. Shiao
  • Publication number: 20040264586
    Abstract: A system, wireless device (102) and method reduce the peak-to-average power of a transmitter by creating at least two sampled carrier data streams, running each carrier through a separate delay block, mixing each carrier over in frequency an appropriate amount, resulting in at least two frequency division multiplexed signals, and combining the at least two frequency division multiplexed signals together. The four sampled carrier data streams may each have a bandwidth of 25 kHz. Each separate delay block is less than 20% of its corresponding symbol time. The transmitter may be used to transmit wideband integrated digitally enhanced network (WiDEN) signals.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Applicant: MOTOROLA, INC.
    Inventors: Stephen S. Shiao, Michael N. Kloos, Michael J. Rudowicz, Patrick J. Doran
  • Publication number: 20040240569
    Abstract: A receiver 200 as a component in a wireless communication device 100 and a corresponding method are used for receiving a multi-carrier communication signal and determining a timing offset thereof. The receiver 200 comprises a controller 222 to perform a correlation on each of a plurality of sub-carriers comprising the multi-carrier signal to provide a plurality of timing offsets. A quality metric corresponding to each of the plurality of timing offsets may be employed to select the best timing offset. Alternatively, a set of timing offsets whose quality metric exceed a threshold may be averaged. Either the best or average timing offset is used for processing all the sub-carriers of the multi-carrier signal.
    Type: Application
    Filed: May 30, 2003
    Publication date: December 2, 2004
    Applicant: MOTOROLA, INC.
    Inventors: Micheal J. Rudowicz, Stephen S. Shiao, Patrick J. Doran
  • Publication number: 20040193405
    Abstract: A pitch adaptive circuit (200) includes an equalizer control circuit (206) that evaluates the pitch of the speech signals that are being processed and depending on the pitch information, the equalizer control circuit (206) selects an equalizer (208, 210) to shape the decoded speech signals. By selecting the best equalizer (208 or 210) to use based on the pitch information, improvements in audio quality are provided automatically without user intervention.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 30, 2004
    Inventors: Patrick J. Doran, Stephen S. Shiao