Patents by Inventor Helena D. O'Shea

Helena D. O'Shea 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: 20210289498
    Abstract: Disclosed herein are system, method, and computer program product embodiments for synchronizing the switching of different wireless platforms to different portions of a frequency band. An embodiment, at a first wireless platform, operates by receiving a band switch request message from a second wireless platform, wherein the band switch request message comprises a band switch delay period for the second wireless platform. The embodiment calculates a band switch time based on a band switch delay period for the first wireless platform and the band switch delay period for the second wireless platform. The embodiment transmits a band switch accept message comprising the band switch time to the second wireless platform. The embodiment sets a first filter to operate on a second portion of the frequency band based on the band switch time. The embodiment then operates on the second portion of the frequency band.
    Type: Application
    Filed: March 10, 2020
    Publication date: September 16, 2021
    Applicant: Apple Inc.
    Inventors: Adam B. LAPEDE, Daniel R. BORGES, Mohammed W. MOKHTAR, Helena D. O'SHEA, Alon PAYCHER, Oren SHANI, Matthew L. SEMERSKY, Sriram HARIHARAN, Sreeraman ANANTHARAMAN, Khaye Loon WEI, Andrew D. SMART
  • Patent number: 8009761
    Abstract: A “unified” modulator for multiple modulation schemes (e.g., GMSK and 8PSK) is described. The waveform for each modulation scheme is generated based on a set of one or more pulse shaping functions. The waveforms for all supported modulation schemes may be generated based on a composite set of all the different pulse shaping functions. The unified modulator includes a filter for each pulse shaping function in the composite set. To generate the waveform for a selected modulation scheme, the set of one or more filters for this modulation scheme is enabled and all other filters are disabled. The outputs from all enabled filters are summed to generate a modulator output. When switching between modulation schemes, a smooth transition may be obtained by (1) providing a suitable data pattern for each filter to be enabled or disabled and (2) generating symbols for the new modulation scheme with an appropriate initial phase.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: August 30, 2011
    Assignee: Qualcomm Incorporation
    Inventors: Kuei-Chiang Lai, Helena D. O'Shea
  • Patent number: 7499506
    Abstract: A biasing algorithm, apparatus and method for detecting and modulation format of a received signal used in a mobile phone system implementing EDGE technology that transmits and receives both GMSK and 8PSK modulated signals. The biasing method and apparatus may also estimate the modulation format of bursts of data blocks of a received signal using information gathered and/or results determined during the modulation detection of one or more previous bursts of a data block to bias the modulation detection of a present burst of the same data block. The gathered information during the modulation detection of a previous burst includes either the signal-to-noise ratio or the noise energy information of the previous burst.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: March 3, 2009
    Assignee: QUALCOMM Incorporated
    Inventors: Kaushik Ghosh, Helena D. O'Shea
  • Publication number: 20040109516
    Abstract: A communications system has a demodulator having an output and a time-averaged DC component subtracter unit coupled to the output of said demodulator to subtract a time-averaged DC offset component from the signal at the output of the demodulator.
    Type: Application
    Filed: November 25, 2003
    Publication date: June 10, 2004
    Inventor: Helena D. O'Shea